IBook G4 Kernel Panic (Solution?)

today i tried to fix my iBook G4 (mid 2005). the problem i was having was i would get kernel panics very shortly after boot, i don't know why but i was. for a while it sat on my shelf and i may have fixed it. i replaced the optical drive with one from my dead TiBook because it said "leopard can't be installed on this computer because the media may be damaged." now it seems to work.. is this a known problem with these iBooks?

The AirPort Extreme Card on that model is attached to the logic board semi-permanently.
It's not an easy thing to swap it out as it was on previous models.
If it's the 12-inch model, the instructions can be found at this link:
http://www.ifixit.com/Guide/Repair/Installing-iBook-G4-12-Inch-1-33-GHz-AirPort- Bluetooth-Board/707/1
At the time I'm posting this, iFixit has two of the boards in stock.

Similar Messages

IBook G3 Kernel Panic at Start Up?

Here is my Problem and what I have done so far. Any suggestions are very much appreciated.
1. I was on the iBook I switched users opened finder and then it crashed. The toolbar disappeared but the dock was still there. (I tried to relaunch finder did not work)
2. I did a force shutdown.
3. I rebooted and it went into a kernel panic at the gray apple screen.
4. Rebooted another kernel panic
5. I tried to boot to safe mode to repair permissions. (did not work)
6. I sent it into target disk mode and tried to repair permissions but it wouldn't let me. (The option was grayed out)
7. I tried to install applejack on it from my iMac using Target Disk Mode. It told me I could only install it on the running OS
Here is what the Kernel Panic Says:
panic(cpu 0 caller 0x002E1EC4) : Unable to find driver for this platform: "PowerBook 4,3".
And then a lot of different numbers and words?
The top part is highlighted in black with gray text but the bottom is white text.
Any help Appreciated Thanks!
JW
P.S. Is this a software issue because of what it says at the top (Unable to find driver for this platform)
I do not have any disk repair software and am looking for a free/very cheap way to fix this. I do not have a hardware test CD or Mac OS CD to boot from.
Does anybody know how to repair permissions using firewire mode?
The only resources I have are:
iMac G4 running Leopard
HP PC Laptop XP
I have already taken out my RAM and Airport Card.

First you should do this:
Repairing the Hard Drive and Permissions
Boot from your OS X Installer disc. After the installer loads select your language and click on the Continue button. When the menu bar appears select Disk Utility from the Installer menu (Utilities menu for Tiger and Leopard.) After DU loads select your hard drive entry (mfgr.'s ID and drive size) from the the left side list. In the DU status area you will see an entry for the S.M.A.R.T. status of the hard drive. If it does not say "Verified" then the hard drive is failing or failed. (SMART status is not reported on external Firewire or USB drives.) If the drive is "Verified" then select your OS X volume from the list on the left (sub-entry below the drive entry,) click on the First Aid tab, then click on the Repair Disk button. If DU reports any errors that have been fixed, then re-run Repair Disk until no errors are reported. If no errors are reported click on the Repair Permissions button. Wait until the operation completes, then quit DU and return to the installer. Now restart normally.
If DU reports errors it cannot fix, then you will need Disk Warrior (4.0 for Tiger, and 4.1 for Leopard) and/or TechTool Pro (4.6.1 for Leopard) to repair the drive. If you don't have either of them or if neither of them can fix the drive, then you will need to reformat the drive and reinstall OS X.
Most likely this will not fix the problem but it will assure whether the drive is OK. If it is then do the following:
How to Perform an Archive and Install
An Archive and Install will NOT erase your hard drive, but you must have sufficient free space for a second OS X installation which could be from 3-9 GBs depending upon the version of OS X and selected installation options. The free space requirement is over and above normal free space requirements which should be at least 6-10 GBs. Read all the linked references carefully before proceeding.
1. Be sure to use Disk Utility first to repair the disk before performing the Archive and Install.
Repairing the Hard Drive and Permissions
Boot from your OS X Installer disc. After the installer loads select your language and click on the Continue button. When the menu bar appears select Disk Utility from the Installer menu (Utilities menu for Tiger.) After DU loads select your hard drive entry (mfgr.'s ID and drive size) from the the left side list. In the DU status area you will see an entry for the S.M.A.R.T. status of the hard drive. If it does not say "Verified" then the hard drive is failing or failed. (SMART status is not reported on external Firewire or USB drives.) If the drive is "Verified" then select your OS X volume from the list on the left (sub-entry below the drive entry,) click on the First Aid tab, then click on the Repair Disk button. If DU reports any errors that have been fixed, then re-run Repair Disk until no errors are reported. If no errors are reported, then quit DU and return to the installer.
2. Do not proceed with an Archive and Install if DU reports errors it cannot fix. In that case use Disk Warrior and/or TechTool Pro to repair the hard drive. If neither can repair the drive, then you will have to erase the drive and reinstall from scratch.
3. Boot from your OS X Installer disc. After the installer loads select your language and click on the Continue button. When you reach the screen to select a destination drive click once on the destination drive then click on the Option button. Select the Archive and Install option. You have an option to preserve users and network preferences. Only select this option if you are sure you have no corrupted files in your user accounts. Otherwise leave this option unchecked. Click on the OK button and continue with the OS X Installation.
4. Upon completion of the Archive and Install you will have a Previous System Folder in the root directory. You should retain the PSF until you are sure you do not need to manually transfer any items from the PSF to your newly installed system.
5. After moving any items you want to keep from the PSF you should delete it. You can back it up if you prefer, but you must delete it from the hard drive.
6. You can now download a Combo Updater directly from Apple's download site to update your new system to the desired version as well as install any security or other updates. You can also do this using Software Update.

Kernel panic solution - My experience

I faced kernel panic during kernel update. Here is my experience in solving the issue:
http://cutecomputer.wordpress.com/2006/ … -solution/
I request Arch developers to take care of this issue which often raises. It is mostly related to update of kernel command line in grub/lilo.

Most important step people have to remember when updating latest 2.6 kernel: http://www.archlinux.org/news/

IBook 700MHz kernel panics when unplugged...

I've had this iBook for about six years now. It kernel panics whenever it is unplugged. It's been about two years now since it's started doing this, though honestly I don't know why I've waited this long to ask this question. Anyone have ideas what the problem could be? The computer recognizes the RAM just fine, I've done a clean install, etc.

Hi, and welcome to Apple Discussions.
Have you tried resetting the PMU?
The PMU (Power Management Unit) controls the charging function, so resetting it may help when you're having trouble with (or without) the adapter.
What version of the OS is the iBook running?

New iBook, kernel panics when awakened from sleep

I've been going nuts for several weeks now due to issues with my new iBook G4. When it is not plugged in, it may be fine when it wakes from sleep, or else it may wake to a black screen of death or else wake up and then freeze (requiring a restart) a few seconds after waking up.
I've reset the PMU several times, removed the third-party RAM (which I thought resolved the issue, until two crashes today when waking up unplugged), reset the PRAM, ran Disk Utility, did an archive and install of 10.4.2, etc. For a day, it would also go through infinite wake/sleep cycles when plugged in with the lid closed, but it resolved on its own within 24 hours. I was all set to send it in to Apple when the issue resolved itself on its own.
But I'm stumped as to the nature of the kernel panics/freezes, etc. They only happen when the iBook is unplugged from AC, USB, etc. and it is not 100% predictable. It may happen the second time I'm waking it up after not being connected to anything. Or it may be fine.
Here's the panic log from today, the details of which are identical to the panic that happened an hour earlier:
Mon Nov 7 16:53:11 2005
panic(cpu 0 caller 0x000A8D00): Uncorrectable machine check: pc = 000000000068E0B8, msr = 0000000000149030, dsisr = 42000000, dar = 00000000218B8000
AsyncSrc = 0000000000000000, CoreFIR = 0000000000000000
L2FIR = 0000000000000000, BusFir = 00000000fff00000
Latest stack backtrace for cpu 0:
Backtrace:
0x00095698 0x00095BB0 0x0002683C 0x000A8D00 0x000A7F90 0x000ABC80
Proceeding back via exception chain:
Exception state (sv=0x2CEEAA00)
PC=0x0068E0B8; MSR=0x00149030; DAR=0x218B8000; DSISR=0x42000000; LR=0x006B8C14; R1=0x0D113D70; XCP=0x00000008 (0x200 - Machine check)
Backtrace:
0x00033384 0x006B8C14 0x0003C744 0x000A9814
Kernel loadable modules in backtrace (with dependencies):
com.apple.iokit.AppleAirPort2(402.6)@0x675000
dependency: com.apple.iokit.IONetworkingFamily(1.5.0)@0x5a3000
dependency: com.apple.iokit.IOPCIFamily(1.7)@0x458000
Exception state (sv=0x20EEFA00)
PC=0x00000000; MSR=0x0000D030; DAR=0x00000000; DSISR=0x00000000; LR=0x00000000; R1=0x00000000; XCP=0x00000000 (Unknown)
Kernel version:
Darwin Kernel Version 8.3.0: Mon Oct 3 20:04:04 PDT 2005; root:xnu-792.6.22.obj~2/RELEASE_PPC
Suggestions? Is this really a hardware issue relating to the AirPort card, or is it something related to kernel extensions? It does not appear to be a user folder-related issue (I tested that as well). Thanks!

I've been having similar problems with my iBook G4/1GHz computer. I haven't yet figured it out when or why it crashes after sleep, but this is sure: everytime there is USB mouse connected, it does that crashing. I bought mighty mouse to make sure, it wasn't the mouse which caused the problems. But no, it wasn't the mouse.
I've tried to google some solutions, but haven't found any. This is very annoying problem. Anyway I can get that crashlog after reboot?
Symptons:
When lid is opened, fan's are started, but no picture or network connection or anything is alive. Display is black. Requires reboot to get it up and running again.
I have run hardware tests on processor, usb, video ram and ram and all have passed.

Kernel panic interrupt many times on my ibook G4

kernel panic interrupt pull up many times, and the latest log file as follows:
Sun Sep 10 11:19:19 2006
panic(cpu 0 caller 0x000A8B98): Uncorrectable machine check: pc = 00000000000ACCA8, msr = 0000000000141030, dsisr = 42000000, dar = 0000000021009000
AsyncSrc = 0000000000000000, CoreFIR = 0000000000000000
L2FIR = 0000000000000000, BusFir = 0000000000000000
Latest stack backtrace for cpu 0:
Backtrace:
0x00095544 0x00095A5C 0x0002683C 0x000A8B98 0x000A7E28 0x000ABB00
Proceeding back via exception chain:
Exception state (sv=0x20FB7500)
PC=0x000ACCA8; MSR=0x00141030; DAR=0x21009000; DSISR=0x42000000; LR=0x000AC98C; R1=0x0D03B800; XCP=0x00000008 (0x200 - Machine check)
Backtrace:
0x00001000 0x0009BC2C 0x0026F830 0x000DF248 0x000DC3C0 0x000DB56C
0x00226A58 0x000FAAD0 0x000F40A8 0x0027AF68 0x0027ACA4 0x002A7A94 0x000ABCB0 0x64617461
Exception state (sv=0x258FD780)
PC=0x900138AC; MSR=0x0200F030; DAR=0x21009000; DSISR=0x42000000; LR=0x90B3482C; R1=0xF0202860; XCP=0x00000030 (0xC00 - System call)
Kernel version:
And my
Hardware Overview:
Machine Name: iBook G4
Machine Model: PowerBook6,7
CPU Type: PowerPC G4 (1.5)
Number Of CPUs: 1
CPU Speed: 1.42 GHz
L2 Cache (per CPU): 512 KB
Memory: 512 MB
Bus Speed: 142 MHz
Boot ROM Version: 4.9.3f0
Serial Number: 4H601071SE9
Sudden Motion Sensor:
State: Enabled
Version: 1.0
And my System Software Overview:
System Version: Mac OS X 10.4.2 (8D37)
Kernel Version: Darwin 8.2.1
Boot Volume: Macintosh HD
Computer Name: iBook
Memory Slot, only built in 512M DIMM0.
ATA Bus:
MATSHITADVD-R UJ-845E:
Model: MATSHITADVD-R UJ-845E
Revision: DMP2
Serial Number:
Detachable Drive: No
Protocol: ATAPI
Unit Number: 0
Socket Type: Internal
No other device connected with ibook.
I have run the hardware test on install CD, all device passed the test.
And I have run cmdopt+pr, kernel panci interrupt still pull up, I will crazy.
Help me!
Thanks
Mac OS X (10.4.2)

Check this link for information on the causes of a
kernel panic and a roadmap of troubleshooting steps
to take in the order provided to resolve.
http://www.thexlab.com/faqs/kernelpanics.html
According to the above links way, the kernel panic active yet. The following is new logs.
Sep 14 11:28:46 2006
Unresolved kernel trap(cpu 0): 0x300 - Data access DAR=0x00000000900105F4 PC=0x000000000005B95C
Latest crash info for cpu 0:
Exception state (sv=0x24A0B280)
PC=0x0005B95C; MSR=0x00009030; DAR=0x900105F4; DSISR=0x40000000; LR=0x0005AE14; R1=0x0D02B1F0; XCP=0x0000000C (0x300 - Data access)
Backtrace:
0x1D8CC790 0x0005AE14 0x002869B0 0x000E4AD4 0x000E4E28 0x000E7284
0x000E6B60 0x000E7408 0x0021FAF4 0x00224D44 0x00224FE0 0x000F9EB0 0x000E0E48 0x000E09DC
0x000ED698 0x000EDA50 0x000EDAF0 0x002A7A94 0x000ABCB0 0x67743B49
Proceeding back via exception chain:
Exception state (sv=0x24A0B280)
previously dumped as "Latest" state. skipping...
Exception state (sv=0x20EF7500)
PC=0x9002218C; MSR=0x0200F030; DAR=0x20EF9F7E; DSISR=0x40000000; LR=0x9003FDD0; R1=0xBFFFF7F0; XCP=0x00000030 (0xC00 - System call)
Kernel version:
Darwin Kernel Version 8.2.1: Fri Jun 24 23:31:10 PDT 2005; root:xnu-792.3.2.obj~1/RELEASE_PPC
panic(cpu 0 caller 0xFFFF0003): 0x300 - Data access
Latest stack backtrace for cpu 0:
Backtrace:
0x00095544 0x00095A5C 0x0002683C 0x000A819C 0x000ABB00
Proceeding back via exception chain:
Exception state (sv=0x24A0B280)
PC=0x0005B95C; MSR=0x00009030; DAR=0x900105F4; DSISR=0x40000000; LR=0x0005AE14; R1=0x0D02B1F0; XCP=0x0000000C (0x300 - Data access)
Backtrace:
0x1D8CC790 0x0005AE14 0x002869B0 0x000E4AD4 0x000E4E28 0x000E7284
0x000E6B60 0x000E7408 0x0021FAF4 0x00224D44 0x00224FE0 0x000F9EB0 0x000E0E48 0x000E09DC
0x000ED698 0x000EDA50 0x000EDAF0 0x002A7A94 0x000ABCB0 0x67743B49
Exception state (sv=0x20EF7500)
PC=0x9002218C; MSR=0x0200F030; DAR=0x20EF9F7E; DSISR=0x40000000; LR=0x9003FDD0; R1=0xBFFFF7F0; XCP=0x00000030 (0xC00 - System call)
Kernel version:
Darwin Kernel Version 8.2.1: Fri Jun 24 23:31:10 PDT 2005; root:xnu-792.3.2.obj~1/RELEASE_PPC
"/Library/Logs/panic.log" [readonly] 71L, 3405C
Fri Sep 15 11:16:16 2006
Unresolved kernel trap(cpu 0): 0x600 - Alignment DAR=0x00000000000071EF PC=0x00000000000A47D4
Latest crash info for cpu 0:
Exception state (sv=0x20F8EA00)
PC=0x000A47D4; MSR=0x00009030; DAR=0x000071EF; DSISR=0x000000A0; LR=0x0007A98C; R1=0x0CFA3D80; XCP=0x00000018 (0x600 - Alignment)
Backtrace:
0x0007AB58 0x0007B764 0x000A9694
Proceeding back via exception chain:
Exception state (sv=0x20F8EA00)
previously dumped as "Latest" state. skipping...
Exception state (sv=0x00D0B280)
PC=0x00000000; MSR=0x0000D030; DAR=0x00000000; DSISR=0x00000000; LR=0x00000000; R1=0x00000000; XCP=0x00000000 (Unknown)
Kernel version:
Darwin Kernel Version 8.2.1: Fri Jun 24 23:31:10 PDT 2005; root:xnu-792.3.2.obj~1/RELEASE_PPC
panic(cpu 0 caller 0xFFFF0006): 0x600 - Alignment
Latest stack backtrace for cpu 0:
Backtrace:
0x00095544 0x00095A5C 0x0002683C 0x000A819C 0x000ABB00
Proceeding back via exception chain:
Exception state (sv=0x20F8EA00)
PC=0x000A47D4; MSR=0x00009030; DAR=0x000071EF; DSISR=0x000000A0; LR=0x0007A98C; R1=0x0CFA3D80; XCP=0x00000018 (0x600 - Alignment)
Backtrace:
0x0007AB58 0x0007B764 0x000A9694
Exception state (sv=0x00D0B280)
PC=0x00000000; MSR=0x0000D030; DAR=0x00000000; DSISR=0x00000000; LR=0x00000000; R1=0x00000000; XCP=0x00000000 (Unknown)
Kernel version:
Darwin Kernel Version 8.2.1: Fri Jun 24 23:31:10 PDT 2005; root:xnu-792.3.2.obj~1/RELEASE_PPC
Mac OS X (10.4.2)

Kernel panic after cloning Mac Pro to iBook G4

Oops! For years I've "synchronized" my iBook to my G4-DP via CCC or SuperDuper. That just bit me, when I tried that from new Mac Pro. The kernel panic message is:
panic (...): Unable to find driver for this platform: "PowerBook6,5"
What is the smart way to recover from this mistake?

Thanks John.
And to avoid this in the future, I've just scripted a new SuperDuper method to "clone" the Mac Pro to the iBook to avoid the Power PC/Intel conflict.
My - this feels much like the grief we have xferring the environment from one PC to another

Interrupted upgrade on an iBook = kernel panic

I was trying to upgrade an old G3 iBook (10.2) to Tiger, and borrowed a firewire DVD drive from a friend. I won't bore you with why, but I had to interrupt the upgrade and start over. No matter what I do now, I get a kernel panic starting up. I've tried Disk Utility, both from an earlier install CD (I don't know how to start up from the firewire DVD drive) and from a G5 connected via firewire, starting the iBook while holding down "T" on the keyboard. Nothing helps.
I can read and save most of the data via the firewire connection to the G5, but my iPod is linked to this computer, I'm editing two mailing lists from it, and a lot of my data is embedded in programs on it. Is there anything I can do to recover this disk, say by removing recently written and updated system files and rebooting?

No, I can see the iBook drive from the G5 via "target disk mode". I just can't get it to boot by itself. Are you saying I can connect the unbootable iBook to the G5 by target disk mode and also connect the DVD drive by firewire and upgrade the iBook that way, by connecting the upgrade DVD to the iBook through a G5 intermediary?

Erratic behaviour. Kernel Panic. RAM problem? HDD? iBook blues..

I dont know what's wrong with my iBook.
At first, safari kept on crashing. I deleted plists (Safari prefs files) and Safari ran again using new default plists... for awhile. Then it crashed and wouldnt start at all.
Then I got my first kernel panic (BSOD of OSX)
I reinstalled OSX TWICE trying to figure out if updates were causing the problem.
I also tried Apple Hardware test from my installation disc. Everyiting ok.
After that, I got a shock when my applications would not run! Safari would exit. YM crashed. MSNmsgr crashed. And then the kernel would panic (like BSOD).
I also removed RAM i recently installed.
PC2700 256MB Kingston.
According to Apple, the iBook G4 1ghz uses PC2100 RAM but is compatible with PC2700 RAM.
I tried Apple Hardware test again from my installation disc. Everyting is fine.
But the system hanged on startup. No login screen at all.
I tried reinstall OSX. But the installer (booted from DVD) does not detect my HDD!!!
shocked, i thought that my disk had failed.
Diskutility of the installer. cannot repair the volume.
HFS: volume okay
Volume ... corrupt.
So, I erased the HDD.
Rebooted and now installer recognizes the disc.
So i just reinstalled OSX for the FOURTH time.
Now im really confused...
What could have caused the HDD to become corrupt?
Was it incompatible RAM? (but the RAM should be compatible)
or is it my HDD failing?
I ran diskwarrior.
SMART HDD reports indicate that the disc is running normally.
I am really confused. Dont know what could be the cause of the problem.
I cannot risk my computer being unable to boot again as i use it for work. And when OSX cannot boot and I had to reinstall (note, Install and archive was not available as OS DVD was a lower version than the installed version) and all my files were gone. Luckily, i had a backup.

Hi, and welcome to Apple Discussions.
It is doubtful that you have been seeing is a kernel panic, since a kernel panic does not give you a blue screen.
The hard drive can be corrupted if you do a forced shutdown instead of a normal one. If you were stuck on a blue screen repeatedly, it is my assumption that you did repeated forced shutdowns. Any and every time you do one, you should repair the hard drive before continuing to work.
I don't understand why Archive and Install was not available to you. I have started over after updates with my 10.3.0 CD and used Archive and Install. There should be no problem in that regard.
The iBook G4 Discussions can be found here.

Kernel Panic for a powerbook driver, but i have an ibook...

I was having trouble with my Finder in 10.2.8 so I was told to get a 10.3 disc to do the Archive and Install feature. I got a hold of the discs and went to do the install and a Kernel Panic popped up. Here's a copy of it:
Panic(cpu 0): Unable to find driver for this platform: “Powerbook2,1”.
Latest stack backtrace ro cpu0:
Backtrace:
0x000833b8 0x0008389c 0x0001ed8c 0x0026da4c 0x0024de04 0x0024dbdc 0x0024e658 0x0024eccc 0x0023ee84 0x0023ee48
Proceeding back via exception chain:
Exception state (sv=0x00495c80)
PC=0x00000000; MSR=0x0000d030; DAR=0x00000000; DSISR=0x00000000; LR=0x00000000; R1=0x00000000; XCP=0x00000000 (Unknown)
I went to Dr. Smoke's website and figured out that it's a problem with the System folder. My questions are: a) does this have anything to do with my finder problem in 10.2.8? and b) why does the powerbook divers matter if I have an ibook clamshell?

Mike--
Sounds to me like you got hold of 10.3 discs for a specific PowerBook, not the a universal installer, or the 10.3 discs for your particular iBook.
As a general rule here's how it goes: you can't use the installation/restore discs that came with a particular Macintosh with another model Macintosh. It doesn't have all the drivers. For example, a PowerBooks' disc would have different drivers for fans, etc., than would the disc for an iMac G5. However, if you can find Panther retail discs, then you'd be fine, as the retail versions would have the proper drivers for all compatible Macintoshes that were released before it.
As to why it says "Powerbook2,1", at that low of a level, the kernel sees portables as Powerbooks. They use the same logic more or less on the desktop Macs, where the iMacs and Power Macs are both "PowerMacN,N" with the Ns distinguishing between models. The Rev. A iMac G5 is PowerMac8,1.
This isn't necessarily so, by the way, for the Intel Macs, where so far the strings are a bit more specific...
charlie

G3 ibook kernel panics in 10.3.9

Hi, I'm trying to revive my old G3 ibook dual usb - it had run fine in OS X (10.3.9) for a couple of years (after replacing the hard drive) - but suddenly started getting freezes/kernel panics etc. I changed the ram - did complete erase and installs and all the usual things - resetting the pram/vram etc. but without success - the display is fine - so I'm assuming the logic board is ok. The odd thing is that OS 9.2.2 works fine with no problems - so hardware doesn't seem to be an issue.
Any suggestions? It's a shame to dump it as it's still very useful - though using OS 9 is rather limiting.
Barry S

Hi Ronda,
It was your advice some years ago that saved this ibook from the trash by suggesting I replace the hard drive - so thanks for that. The original CDs - yes I do have (OS 9.1 - 4 CDs) - which I've used successfully to restore it.
In answer to your question - yes I believe the 3 x OS 10.3 install discs are the retail version. The ibook is 500MHz. Optical drive is a CD-RW CRX 700E - driver version 1.4.7.
It came with a 256MB ram module - which I replaced with a 512MB module - I have tried swapping these - as I know some kernel panics can be caused by bad ram - but still the same. When it's running on 10.3.9 it sometimes even freezes when booting from the start up disk.
This may just be my imagination but it does appear hotter running on 10.3.9 rather than OS 9.22.
As I said in my post, it did run fine for a couple of years - so these freezes and kernel panics are a bit of a mystery.

Kernel Panic problems - have tried quite a few solutions

Hi,
Old iBook G4 raises a Kernel Panic more often than not on wake from sleep, and at different stages during boot. The Crash Log is /always/ the same:
"Unresolved kernel trap(cpu 0): 0x300 - Data access DAR=<The DAR value varies slightly each time>"
So far I've run "fsck -fy" and used "memtest all 1" in Single-User Mode with no errors reported. I "zapped" the NVRAM and PRAM by holding the Command-Option-P-R keys for three startup chimes. Oh, and I'm running a pristine, brand-new install of Tiger from the DVD (minus the extra languages and plus the X11 stuff). I've repaired permissions. I ran a full scan of the HDD with TechTool Pro 4 (over Firewire from my PowerBook) and no errors were reported. SMART status is "verified" in System Profiler.
I hope you don't mind, but I'm going to include the 4 most recent Crash Reports:
1:
Unresolved kernel trap(cpu 0): 0x300 - Data access DAR=0x00000000000000CC PC=0x000000000026E174
Latest crash info for cpu 0:
Exception state (sv=0x23979780)
PC=0x0026E174; MSR=0x00009030; DAR=0x000000CC; DSISR=0x40000000; LR=0x0026E144; R1=0x0F5E3A40; XCP=0x0000000C (0x300 - Data access)
Backtrace:
0x00000000 0x002A59C0 0x0004333C 0x00043268 0x002A5834 0x000A9654
Proceeding back via exception chain:
Exception state (sv=0x23979780)
previously dumped as "Latest" state. skipping...
Exception state (sv=0x1F81D280)
PC=0x00000000; MSR=0x0000D030; DAR=0x00000000; DSISR=0x00000000; LR=0x00000000; R1=0x00000000; XCP=0x00000000 (Unknown)
Kernel version:
Darwin Kernel Version 8.0.0: Sat Mar 26 14:15:22 PST 2005; root:xnu-792.obj~1/RELEASE_PPC
panic(cpu 0 caller 0xFFFF0003): 0x300 - Data access
Latest stack backtrace for cpu 0:
Backtrace:
0x00095564 0x00095A7C 0x00026838 0x000A8184 0x000AB880
Proceeding back via exception chain:
Exception state (sv=0x23979780)
PC=0x0026E174; MSR=0x00009030; DAR=0x000000CC; DSISR=0x40000000; LR=0x0026E144; R1=0x0F5E3A40; XCP=0x0000000C (0x300 - Data access)
Backtrace:
0x00000000 0x002A59C0 0x0004333C 0x00043268 0x002A5834 0x000A9654
Exception state (sv=0x1F81D280)
PC=0x00000000; MSR=0x0000D030; DAR=0x00000000; DSISR=0x00000000; LR=0x00000000; R1=0x00000000; XCP=0x00000000 (Unknown)
Kernel version:
Darwin Kernel Version 8.0.0: Sat Mar 26 14:15:22 PST 2005; root:xnu-792.obj~1/RELEASE_PPCModel: PowerBook6,3, BootROM 4.7.7f0, 1 processors, PowerPC G4 (3.3), 800 MHz, 640 MB
Graphics: ATI Mobility Radeon 9200, ATY,RV280M9+, AGP, 32 MB
Memory Module: DIMM0/BUILT-IN, 128 MB, built-in, built-in
Memory Module: DIMM1/J31, 512 MB, DDR SDRAM, PC2100U-25330
AirPort: AirPort Extreme, 3.5f1 (3.50.37.p6)
Modem: MicroDash, Euro, V.92, 1.0F, APPLE VERSION 2.6.4
Parallel ATA Device: MATSHITACD-RW CW-8123,
Parallel ATA Device: SAMSUNG MP0804H, 74.56 GB
2:
Unresolved kernel trap(cpu 0): 0x300 - Data access DAR=0x0000000000000008 PC=0x000000000003E960
Latest crash info for cpu 0:
Exception state (sv=0x273C9500)
PC=0x0003E960; MSR=0x00001030; DAR=0x00000008; DSISR=0x40000000; LR=0x0003EA94; R1=0x0F6BBBA0; XCP=0x0000000C (0x300 - Data access)
Backtrace:
0x00075E24 0x0003EA94 0x0001EAC0 0x00020450 0x000244A8 0x00049AC0
0x000291BC 0x000233A8 0x000ABBAC 0x00000000
Proceeding back via exception chain:
Exception state (sv=0x273C9500)
previously dumped as "Latest" state. skipping...
Exception state (sv=0x30A4D280)
PC=0x9000A758; MSR=0x0000F030; DAR=0x90BC94C0; DSISR=0x40000000; LR=0x9000A69C; R1=0xF0111D60; XCP=0x00000030 (0xC00 - System call)
Kernel version:
Darwin Kernel Version 8.0.0: Sat Mar 26 14:15:22 PST 2005; root:xnu-792.obj~1/RELEASE_PPC
panic(cpu 0 caller 0xFFFF0003): 0x300 - Data access
Latest stack backtrace for cpu 0:
Backtrace:
0x00095564 0x00095A7C 0x00026838 0x000A8184 0x000AB880
Proceeding back via exception chain:
Exception state (sv=0x273C9500)
PC=0x0003E960; MSR=0x00001030; DAR=0x00000008; DSISR=0x40000000; LR=0x0003EA94; R1=0x0F6BBBA0; XCP=0x0000000C (0x300 - Data access)
Backtrace:
0x00075E24 0x0003EA94 0x0001EAC0 0x00020450 0x000244A8 0x00049AC0
0x000291BC 0x000233A8 0x000ABBAC 0x00000000
Exception state (sv=0x30A4D280)
PC=0x9000A758; MSR=0x0000F030; DAR=0x90BC94C0; DSISR=0x40000000; LR=0x9000A69C; R1=0xF0111D60; XCP=0x00000030 (0xC00 - System call)
Kernel version:
Darwin Kernel Version 8.0.0: Sat Mar 26 14:15:22 PST 2005; root:xnu-792.obj~1/RELEASE_PPC
Model: PowerBook6,3, BootROM 4.7.7f0, 1 processors, PowerPC G4 (3.3), 800 MHz, 640 MB
Graphics: ATI Mobility Radeon 9200, ATY,RV280M9+, AGP, 32 MB
Memory Module: DIMM0/BUILT-IN, 128 MB, built-in, built-in
Memory Module: DIMM1/J31, 512 MB, DDR SDRAM, PC2100U-25330
AirPort: AirPort Extreme, 3.5f1 (3.50.37.p6)
Modem: MicroDash, Euro, V.92, 1.0F, APPLE VERSION 2.6.4
Parallel ATA Device: MATSHITACD-RW CW-8123,
Parallel ATA Device: SAMSUNG MP0804H, 74.56 GB
3:
Unresolved kernel trap(cpu 0): 0x300 - Data access DAR=0x0000000000000000 PC=0x00000000249E3298
Latest crash info for cpu 0:
Exception state (sv=0x27955000)
PC=0x249E3298; MSR=0x00009030; DAR=0x00000000; DSISR=0x40000000; LR=0x249E3264; R1=0x0F6DB6B0; XCP=0x0000000C (0x300 - Data access)
Backtrace:
0x249E3264 0x249E34B0 0x002C69D8 0x002C533C 0x002C48A8 0x002C478C
0x002C54B4 0x002C48A8 0x002C478C 0x002C54B4 0x002C48A8 0x002C478C 0x002C5538 0x002C2AB8
0x002C58A0 0x002C55A4 0x002C2AB8 0x002C55DC 0x002C2AB8 0x005B503C 0x005B02AC 0x002CE344
0x005B0320 0x0003C734 0x000A9654
Kernel loadable modules in backtrace (with dependencies):
com.apple.driver.AppleUSBCDCACMControl(3.1.4)@0x249e1000
dependency: com.apple.iokit.IOUSBFamily(2.2.0)@0x434000
com.apple.iokit.IONetworkingFamily(1.5.0)@0x5a4000
Proceeding back via exception chain:
Exception state (sv=0x27955000)
previously dumped as "Latest" state. skipping...
Exception state (sv=0x2398C780)
PC=0x00000000; MSR=0x0000D030; DAR=0x00000000; DSISR=0x00000000; LR=0x00000000; R1=0x00000000; XCP=0x00000000 (Unknown)
Kernel version:
Darwin Kernel Version 8.0.0: Sat Mar 26 14:15:22 PST 2005; root:xnu-792.obj~1/RELEASE_PPC
panic(cpu 0 caller 0xFFFF0003): 0x300 - Data access
Latest stack backtrace for cpu 0:
Backtrace:
0x00095564 0x00095A7C 0x00026838 0x000A8184 0x000AB880
Proceeding back via exception chain:
Exception state (sv=0x27955000)
PC=0x249E3298; MSR=0x00009030; DAR=0x00000000; DSISR=0x40000000; LR=0x249E3264; R1=0x0F6DB6B0; XCP=0x0000000C (0x300 - Data access)
Backtrace:
0x249E3264 0x249E34B0 0x002C69D8 0x002C533C 0x002C48A8 0x002C478C
0x002C54B4 0x002C48A8 0x002C478C 0x002C54B4 0x002C48A8 0x002C478C 0x002C5538 0x002C2AB8
0x002C58A0 0x002C55A4 0x002C2AB8 0x002C55DC 0x002C2AB8 0x005B503C 0x005B02AC 0x002CE344
0x005B0320 0x0003C734 0x000A9654
Kernel loadable modules in backtrace (with dependencies):
com.apple.driver.AppleUSBCDCACMControl(3.1.4)@0x249e1000
dependency: com.apple.iokit.IOUSBFamily(2.2.0)@0x434000
com.apple.iokit.IONetworkingFamily(1.5.0)@0x5a4000
Exception state (sv=0x2398C780)
PC=0x00000000; MSR=0x0000D030; DAR=0x00000000; DSISR=0x0Model: PowerBook6,3, BootROM 4.7.7f0, 1 processors, PowerPC G4 (3.3), 800 MHz, 640 MB
Graphics: ATI Mobility Radeon 9200, ATY,RV280M9+, AGP, 32 MB
Memory Module: DIMM0/BUILT-IN, 128 MB, built-in, built-in
Memory Module: DIMM1/J31, 512 MB, DDR SDRAM, PC2100U-25330
AirPort: AirPort Extreme, 3.5f1 (3.50.37.p6)
Modem: MicroDash, Euro, V.92, 1.0F, APPLE VERSION 2.6.4
Parallel ATA Device: MATSHITACD-RW CW-8123,
Parallel ATA Device: SAMSUNG MP0804H, 74.56 GB
USB Device: Controller, ©Microsoft Corporation, Up to 12 Mb/sec, 500 mA
4:
Unresolved kernel trap(cpu 0): 0x300 - Data access DAR=0x0000000000000000 PC=0x00000000249E3298
Latest crash info for cpu 0:
Exception state (sv=0x27955000)
PC=0x249E3298; MSR=0x00009030; DAR=0x00000000; DSISR=0x40000000; LR=0x249E3264; R1=0x0F6DB6B0; XCP=0x0000000C (0x300 - Data access)
Backtrace:
0x249E3264 0x249E34B0 0x002C69D8 0x002C533C 0x002C48A8 0x002C478C
0x002C54B4 0x002C48A8 0x002C478C 0x002C54B4 0x002C48A8 0x002C478C 0x002C5538 0x002C2AB8
0x002C58A0 0x002C55A4 0x002C2AB8 0x002C55DC 0x002C2AB8 0x005B503C 0x005B02AC 0x002CE344
0x005B0320 0x0003C734 0x000A9654
Kernel loadable modules in backtrace (with dependencies):
com.apple.driver.AppleUSBCDCACMControl(3.1.4)@0x249e1000
dependency: com.apple.iokit.IOUSBFamily(2.2.0)@0x434000
com.apple.iokit.IONetworkingFamily(1.5.0)@0x5a4000
Proceeding back via exception chain:
Exception state (sv=0x27955000)
previously dumped as "Latest" state. skipping...
Exception state (sv=0x2398C780)
PC=0x00000000; MSR=0x0000D030; DAR=0x00000000; DSISR=0x00000000; LR=0x00000000; R1=0x00000000; XCP=0x00000000 (Unknown)
Kernel version:
Darwin Kernel Version 8.0.0: Sat Mar 26 14:15:22 PST 2005; root:xnu-792.obj~1/RELEASE_PPC
panic(cpu 0 caller 0xFFFF0003): 0x300 - Data access
Latest stack backtrace for cpu 0:
Backtrace:
0x00095564 0x00095A7C 0x00026838 0x000A8184 0x000AB880
Proceeding back via exception chain:
Exception state (sv=0x27955000)
PC=0x249E3298; MSR=0x00009030; DAR=0x00000000; DSISR=0x40000000; LR=0x249E3264; R1=0x0F6DB6B0; XCP=0x0000000C (0x300 - Data access)
Backtrace:
0x249E3264 0x249E34B0 0x002C69D8 0x002C533C 0x002C48A8 0x002C478C
0x002C54B4 0x002C48A8 0x002C478C 0x002C54B4 0x002C48A8 0x002C478C 0x002C5538 0x002C2AB8
0x002C58A0 0x002C55A4 0x002C2AB8 0x002C55DC 0x002C2AB8 0x005B503C 0x005B02AC 0x002CE344
0x005B0320 0x0003C734 0x000A9654
Kernel loadable modules in backtrace (with dependencies):
com.apple.driver.AppleUSBCDCACMControl(3.1.4)@0x249e1000
dependency: com.apple.iokit.IOUSBFamily(2.2.0)@0x434000
com.apple.iokit.IONetworkingFamily(1.5.0)@0x5a4000
Exception state (sv=0x2398C780)
PC=0x00000000; MSR=0x0000D030; DAR=0x00000000; DSISR=0x0Model: PowerBook6,3, BootROM 4.7.7f0, 1 processors, PowerPC G4 (3.3), 800 MHz, 640 MB
Graphics: ATI Mobility Radeon 9200, ATY,RV280M9+, AGP, 32 MB
Memory Module: DIMM0/BUILT-IN, 128 MB, built-in, built-in
Memory Module: DIMM1/J31, 512 MB, DDR SDRAM, PC2100U-25330
AirPort: AirPort Extreme, 3.5f1 (3.50.37.p6)
Modem: MicroDash, Euro, V.92, 1.0F, APPLE VERSION 2.6.4
Parallel ATA Device: MATSHITACD-RW CW-8123,
Parallel ATA Device: SAMSUNG MP0804H, 74.56 GB
USB Device: Nokia 6120 classic, Nokia, Up to 12 Mb/sec, 500 mA
USB Device: Controller, ©Microsoft Corporation, Up to 12 Mb/sec, 500 mA
I have a 512MB module under lifetime warranty, and the store has offered to replace it if it's faulty, but so far I've no proof. Up to this point I've been reluctant to remove it myself as I don't have the specific tools or an anti-static wrist strap, but I may dive in anyway, and see what happens. I'll post any results. In the meantime, any other diagnostic suggestions?
Thanks.
SiR G.

I'll give that a shot. It seems relevant given the following error messages that I've been noticing consistently when booting through Single-User Mode:
OHCI Root hub simulation: family specific matching fails
EHCI Root hub simulation: family specific matching fails
Matching Service Count=10 (or Matching Service Count=29)
This error appears even when there are no peripherals attached, via USB or any other port.
Fingers crossed!
Sir Gad.

Misc startup/kernel panics on iBook G4

I've been trying to diagnose multiple kernel panics and startup issues on one of our 1.42 GHz G4 iBooks. Currently, the problem is that when I press the power button, I hear the startup chime but the screen does not work. I have to hold the power button to shut down. When it does boot, and the screen works, it will work for a while but then kernel panic.
I've run all sorts of diagnostics, including the Apple Hardware Test (which it passed).
I've reinstalled Tiger (erase and install).
I have an external hard drive with a troubleshooting partition of Leopard which the 'Book will boot from.
Today I managed to capture this report:
Interval Since Last Panic Report: 2432 sec
Panics Since Last Report: 2
Anonymous UUID: 76E06AD4-DDCE-46F3-AFC0-4A312904B67B
Mon Apr 12 16:17:15 2010
panic(cpu 0 caller 0x000A8C00): Uncorrectable machine check: pc = 00000000006B352C, msr = 0000000000149030, dsisr = 42000000, dar = 00000000E00EF000
AsyncSrc = 0000000000000000, CoreFIR = 0000000000000000
L2FIR = 0000000000000000, BusFir = 00000000ff000000
Latest stack backtrace for cpu 0:
Backtrace:
0x000954F8 0x00095A10 0x00026898 0x000A8C00 0x000A7E90 0x000ABB80
Proceeding back via exception chain:
Exception state (sv=0x3C293000)
PC=0x006B352C; MSR=0x00149030; DAR=0xE00EF000; DSISR=0x42000000; LR=0x006C8078; R1=0x21FBBD30; XCP=0x00000008 (0x200 - Machine check)
Backtrace:
0x0027D47C 0x006C8078 0x002D1B8C 0x002D0A54 0x000A9714
Kernel loadable modules in backtrace (with dependencies):
com.apple.iokit.AppleAirPort2(405.1)@0x689000
dependency: com.apple.iokit.IONetworkingFamily(1.5.0)@0x5b6000
dependency: com.apple.iokit.IOPCIFamily(1.7)@0x48d000
Exception state (sv=0x37B31000)
PC=0x00000000; MSR=0x0000D030; DAR=0x00000000; DSISR=0x00000000; LR=0x00000000; R1=0x00000000; XCP=0x00000000 (Unknown)
Kernel version:
Darwin Kernel Version 8.11.0: Wed Oct 10 18:26:00 PDT 2007; root:xnu-792.24.17~1/RELEASE_PPC
Anyone know what this report is telling me?
Thank you.

If memory serves, that computer has a combination Airport/Bluetooth card on the logicboard. If you need the wireless capabilities, you'll want to purchase a USB dongle for the machine. While it is possible to repair/replace the internal card, I've been told it's not a particularly easy task!
~Lyssa

Dropped iBook G4 (no damage), Now Kernel Panics

I recently dropped my 4 year old iBook G4 (while it was sleeping) onto a wood table from about a foot up. When I tried restarting it, I kept getting kernel panics. So I completely reinstalled the OS (Leopard). Now I can do most tasks on the computer, but I still get kernel panics on a regular basis. I think there is clearly a hardware issue, although there is apparently NO physical damage to the machine. There is nothing wrong with the hard drive, which is the only mechanical device that could possibly be damaged by a drop, right? Reinstalling Leopard didn't really solve the problem. (I'm looking for an Apple Hardware Test disc to see if that will help diagnose the problem...)
Any words of advice? Suggestions would be greatly appreciated. Thank you!
Here are the details for the kernel panic (after I reinstalled 10.5 -- I haven't updated to 10.5.6 yet):
Sat Jan 17 10:06:16 2009
panic(cpu 0 caller 0x000AE584): "Uncorrectable machine check: pc = 00000000319D0E88, msr = 0000000000149030, dsisr = 42000000, dar = 00000000067E0000\n" " AsyncSrc = 0000000000000000, CoreFIR = 0000000000000000\n" " L2FIR = 0000000000000000, BusFir = 000000000000ff00\n"@/SourceCache/xnu/xnu-1228/osfmk/ppc/trap.c:975
Latest stack backtrace for cpu 0:
Backtrace:
0x0009AD18 0x0009B6BC 0x00029DC4 0x000AE584 0x000AE804 0x000B22F8
Proceeding back via exception chain:
Exception state (sv=0x30a6d500)
PC=0x319D0E88; MSR=0x00149030; DAR=0x067E0000; DSISR=0x42000000; LR=0x319D0F70; R1=0x305CFBA0; XCP=0x00000008 (0x200 - Machine check)
Backtrace:
0x00000000 0x31A29B18 0x31A2A484 0x319CA3D0 0x00355B40 0x003547BC
0x00354E58 0x000AFE54
Kernel loadable modules in backtrace (with dependencies):
com.apple.driver.AirPortBrcm43xx(302.25.10)@0x319c0000->0x31aecfff
dependency: com.apple.iokit.IO80211Family(200.7)@0x300ee000
dependency: com.apple.iokit.IOPCIFamily(2.4)@0x29e84000
dependency: com.apple.iokit.IONetworkingFamily(1.6.0)@0x3000b000
Exception state (sv=0x29d94500)
PC=0x00000000; MSR=0x0000D030; DAR=0x00000000; DSISR=0x00000000; LR=0x00000000; R1=0x00000000; XCP=0x00000000 (Unknown)
BSD process name corresponding to current thread: kernel_task
Mac OS version:
9A581
Kernel version:
Darwin Kernel Version 9.0.0: Tue Oct 9 21:37:58 PDT 2007; root:xnu-1228~1/RELEASE_PPC
Message was edited by: geoffmyers1
Message was edited by: geoffmyers1

A drop could damage the motherboard causing a break or intermittent break. As the iBook heats and cools the connection can be intermittent causing it to work and fail randomly.

Kernel panics with iBook G4 and 10.3.9 (modem kext)

Upon upgrading my iBook G4 to 10.3.9, I began recieving a rash of kernel panics (about 1-2 a day) . This was quite a change from the relatively solid machine I had previous ( about a panic a month with 10.3.8 with heavy daily use ). I initially suspected some ram failure but after extensive testing (bit flip, pattern, etc.) in single user mode eliminated that possibility.
The panic log contiuously pointed at the MotorolaSM56K driver. I now suspected a kernel module/kernel incompatibility problem. After activating root and kextunloading that class I was able to regain some measure of stabilty ( about 4-5 days between crashes ). This stability varied as the class would be reloaded by OS under certain (unknown) conditions. As I have actually never used the built-in modem I have now decided to fully unload the AppleI2SModemFamily.kext extension, to avoid the SM56K class from starting.
Have others noticed similar issues when upgrading from 10.3.8 to 10.3.9? or with the modem kext? I am suprised at the poor quality of this "upgrade", having used X since 10.1 on my ibook G3 (that I have now kept at 10.3.8)
Is the modem kernel extension a red herring and its truly an issue in the kernel (that the modem extension exposes)?
attached are some snippets from my (now very long) panic.log:
Wed Nov 23 14:35:32 2005
Unresolved kernel trap(cpu 0): 0x300 - Data access DAR=0x000000000000025C PC=0x000000000008D810
Latest crash info for cpu 0:
Exception state (sv=0x326E3280)
PC=0x0008D810; MSR=0x00001030; DAR=0x0000025C; DSISR=0x40000000; LR=0x0001784C; R1=0x121EBC50; XCP=0x0000000C (0x300 - Data access)
Backtrace:
0x000177F4 0x00014774 0x000219F8 0x00040DC4 0x00016360 0x000189D4 0x0001C9E0 0x00027444
0x00094318 0x0079003E
Kernel loadable modules in backtrace (with dependencies):
com.apple.driver.MotorolaSM56K(1.3.1)@0x6ef000
dependency: com.apple.driver.AppleI2SModemFamily(1.1.2)@0x6e4000
dependency: com.apple.iokit.IOSerialFamily(6.0.1d20)@0x49d000
Proceeding back via exception chain:
Exception state (sv=0x326E3280)
previously dumped as "Latest" state. skipping...
Exception state (sv=0x259F4A00)
PC=0x900106D8; MSR=0x0000F030; DAR=0x1C348004; DSISR=0x40000000; LR=0x901D9778; R1=0xBFFFEDB0; XCP=0x00000030 (0xC00 - System call)
Kernel version:
Darwin Kernel Version 7.9.0:
Wed Mar 30 20:11:17 PST 2005; root:xnu/xnu-517.12.7.obj~1/RELEASE_PPC
panic(cpu 0): 0x300 - Data access
Latest stack backtrace for cpu 0:
Backtrace:
0x00083498 0x0008397C 0x0001EDA4 0x00090C38 0x0009402C
Proceeding back via exception chain:
Exception state (sv=0x326E3280)
PC=0x0008D810; MSR=0x00001030; DAR=0x0000025C; DSISR=0x40000000; LR=0x0001784C; R1=0x121EBC50; XCP=0x0000000C (0x300 - Data access)
Backtrace:
0x000177F4 0x00014774 0x000219F8 0x00040DC4 0x00016360 0x000189D4 0x0001C9E0 0x00027444
0x00094318 0x0079003E
Kernel loadable modules in backtrace (with dependencies):
com.apple.driver.MotorolaSM56K(1.3.1)@0x6ef000
dependency: com.apple.driver.AppleI2SModemFamily(1.1.2)@0x6e4000
dependency: com.apple.iokit.IOSerialFamily(6.0.1d20)@0x49d000
Exception state (sv=0x259F4A00)
PC=0x900106D8; MSR=0x0000F030; DAR=0x1C348004; DSISR=0x40000000; LR=0x901D9778; R1=0xBFFFEDB0; XCP=0x00000030 (0xC00 - System call)
Kernel version:
Darwin Kernel Version 7.9.0:
Wed Mar 30 20:11:17 PST 2005; root:xnu/xnu-517.12.7.obj~1/RELEASE_PPC
Wed Nov 23 20:54:17 2005
Unresolved kernel trap(cpu 0): 0x300 - Data access DAR=0x000000000000025C PC=0x000000000008D810
Latest crash info for cpu 0:
Exception state (sv=0x326E3280)
PC=0x0008D810; MSR=0x00001030; DAR=0x0000025C; DSISR=0x40000000; LR=0x0001784C; R1=0x121EBC50; XCP=0x0000000C (0x300 - Data access)
Backtrace:
0x000177F4 0x00014774 0x000219F8 0x00040DC4 0x00016360 0x000189D4 0x0001C9E0 0x00027444
0x00094318 0x0079003E
Kernel loadable modules in backtrace (with dependencies):
com.apple.driver.MotorolaSM56K(1.3.1)@0x6ef000
dependency: com.apple.driver.AppleI2SModemFamily(1.1.2)@0x6e4000
dependency: com.apple.iokit.IOSerialFamily(6.0.1d20)@0x49d000
Proceeding back via exception chain:
Exception state (sv=0x326E3280)
previously dumped as "Latest" state. skipping...
Exception state (sv=0x259F4A00)
PC=0x900106D8; MSR=0x0000F030; DAR=0x1C348004; DSISR=0x40000000; LR=0x901D9778; R1=0xBFFFEDB0; XCP=0x00000030 (0xC00 - System call)
Kernel version:
Darwin Kernel Version 7.9.0:
Wed Mar 30 20:11:17 PST 2005; root:xnu/xnu-517.12.7.obj~1/RELEASE_PPC
panic(cpu 0): 0x300 - Data access
Latest stack backtrace for cpu 0:
Backtrace:
0x00083498 0x0008397C 0x0001EDA4 0x00090C38 0x0009402C
Proceeding back via exception chain:
Exception state (sv=0x326E3280)
PC=0x0008D810; MSR=0x00001030; DAR=0x0000025C; DSISR=0x40000000; LR=0x0001784C; R1=0x121EBC50; XCP=0x0000000C (0x300 - Data access)
Backtrace:
0x000177F4 0x00014774 0x000219F8 0x00040DC4 0x00016360 0x000189D4 0x0001C9E0 0x00027444
0x00094318 0x0079003E
Kernel loadable modules in backtrace (with dependencies):
com.apple.driver.MotorolaSM56K(1.3.1)@0x6ef000
dependency: com.apple.driver.AppleI2SModemFamily(1.1.2)@0x6e4000
dependency: com.apple.iokit.IOSerialFamily(6.0.1d20)@0x49d000
Exception state (sv=0x259F4A00)
PC=0x900106D8; MSR=0x0000F030; DAR=0x1C348004; DSISR=0x40000000; LR=0x901D9778; R1=0xBFFFEDB0; XCP=0x00000030 (0xC00 - System call)
Kernel version:
Darwin Kernel Version 7.9.0:
Wed Mar 30 20:11:17 PST 2005; root:xnu/xnu-517.12.7.obj~1/RELEASE_PPC
iBook G4 Mac OS X (10.3.9)

A reasonable possibility is that you upgraded without
first repairing the hard drive and permissions.
Although this may not help after the fact, I suggest
you give it a try:
Boot from your OS X Installer. Be sure to use the
installer for the version of OS X you have installed.
After the installer loads select Disk Utility from
the Installer menu (or Utilities menu if using
Tiger.) After DU loads select your OS X volume from
the list on the left, click on the First Aid tab,
then click on the Repair Disk button. If DU reports
any errors that have been fixed, then re-run Repair
Disk until no errors are reported. If no errors are
reported click on the Repair Permissions button. Wait
until the operation completes, then quit DU and
return to the installer. Now shutdown the computer
for a couple of minutes and then restart normally.
This I did yesterday and found a slew of permission setting problems - speaking to some endemic issues in the OS software/installation scripts. But after doing this repair (all were repairable) and reinstalling the COMBO update to 10.3.9 the problem persists. Thanks for the tip.
Keep in mind that RAM can pass the memory tests yet
not work properly with OS X. Therefore, you cannot
assume that because the RAM passed the memory tests
that it is fully functional with OS X. If you have
installed third-party RAM, the only definitive test
is to remove it and see if the kernel panics cease.
If they do, then add one module at a time and
re-test. When the panics recur you have identified
the faulty module.
Though I find disconcerting that Apple's POST routines are not sufficient to identify out of spec/incompatible RAM, I fully tested my memory (as mentioned) using memtest in single user mode. Memtest is a gnu program ported over from BSD unix that does exhaustive memory testing (ie the patterns, walking, etc that I mentioned)
Of course it's also possible there is a hardware
problem with the modem itself or that your upgrade to
10.3.9 is defective. After repairing the hard drive
and permissions you should reinstall the 10.3.9
update, but be sure to do so using the Combo updater.
You can download it from Apple's download site.
How the modem hardware failure mysteriously coincided with my 10.3.9 upgrade begs the question on how could be anything but a software issue...

IBook G4 Kernel Panic (Solution?)

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