Device driver permissions reset after modunload in /etc/rc3

Hi,
I have a device driver that I installed on a Solaris 9 platform (Condor 1553 navigation device). I installed it with 666 permissions so that users can access it.
The problem is, the permissions on it change to 600 after the OS has booted. After completing run level 2 activities, the permissions are set correctly, but something during run level 3 is resetting it to 600. I believe it may be the modunload call in rc3 - but don't understand why it would be doing this.
Thanks in advance for any help.

Hi. Did you specify the perm 666 during driver installation (add_drv(1M))? If not, I think you can change it via update_drv(1M).
Hope this helps.

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Itunes/Iphone/Ipod device driver issues - tried everything. Still not working.

After hours and hours of research, I'm completely stuck. Here's the basic problem.
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Bluetooth Peripheral Device Driver "Not Found"

Hi Experts,
I am using a
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AbdulQuadeer wrote:
Hi Experts,
I am using a
HP Pavilion dv6-6093ex
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What you need to provide is a P/N to verify what it has for driver.
How Do I Find My Model Number or Product Number?
I am a Volunteer to help others on here-not a HP employee.
Replies aren't online 24/7 because of Time Zone differences.
Remember in this Day and Age of Computing the Internet is Knowledge at your fingertips if you choose understand it. -2015-

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Last edited by ImbaLocus (2012-10-30 23:41:08)

Thank you, this works.
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See:
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I would start with
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or
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Gracenote MusicID 1.9.6.115
Gracenote Submit 1.9.6.143
Gracenote DSP 1.9.6.45
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iTunes is not running in safe mode.
WebKit accelerated compositing is enabled.
HDCP is supported.
Core Media is supported.
Video Display Information
ATI Technologies Inc., AMD Radeon(TM) HD 6520G
**** External Plug-ins Information ****
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**** Device Connectivity Tests ****
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Serial Number: JQ******S42
<Edited By Host>

OMG same thing here; rather annoyed and now have set up accounts on 2 comps(both 64 vista ultimate); about to try my 32 bit vista on my lappy; we'll see... i don;t have high hopes thoush.
What i knew about iPhone before buying it:
What You Need
To use iPhone, you need:
A new two-year wireless service plan with AT&T
A Mac or a PC with a USB 2.0 port and one of the following operating systems:
Mac OS X version10.4.10 or later
Windows XP Home or Professional with Service Pack 2 or later
Windows Vista Home Premium, Business, Enterprise, or Ultimate edition
iTunes 7.3 or later, available at www.itunes.com
An iTunes Store account
An Internet connection
You must be at least 18 years old to open a new AT&T wireless account. You will need a
major credit card to open a new iTunes Store account.
Yeahyeah check all that stuff;
Oh well; just when i thought i'd finally cross over to the beautiful packaging of APPLE. I remember in design school that form follows function. Thanks.
Windows Vista

Unknown Device After Recovery - NEED DEVICE DRIVER

Pavilion dv6
Windows 7 Premimum Home
My HD died and I installed a new one, did all the recovery. There is one Unknown Device -- can't find out what it is.
USB\VID_138&PID_0018&REV_0078
Can someone give me a link to this device driver please

Hi,
Please try this:
http://ftp.hp.com/pub/softpaq/sp54001-54500/sp54362.exe
Regards.
BH
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Reboot the computer.
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Remove all Apple related components and reinstall iTunes.

Permissions errors after clean installation of 10.7.2

hey, I'm sorry for the length of this thread.
after upgrading to Lion (via mac app store) from the newest snow leopard, the system's performance had become worst.
then, i decided to back up all of my files manually and do a clean install making a lion 10.7.2 bootable DVD from the .dmg file I purchased, and converting a USB flash drive to the lion recovery disk assistant.
I decided not to back up anything (including user) using time machine and migration assisnant.
after finishing with this process I've created a new administrator user and verified and repaired disk & permissions, and then moved back all of my data from an external HDD. putting everything back to place where it was before formatting, and changing all of the system preferences, apple software (iTunes, Safari, iPhoto, Finder) one by one.
of course, software updates, restarts.
I've done a few things that I might shoudn't do:
copying the entire 'Music' folder of my user with all of its contents like 'iTunes Library Extras.itdb', 'iTunes Library Genius.itdb', 'iTunes Library.itl', 'iTunes Music Library.xml'.
after that I also did itunes file > import playlist > Library.xml (which i exported to external HDD before formatting).
unfortunately, something has got very wrong with this process. now these brand new awful issues came up:
1. everytime after logging in/restarting, it seems like the Finder 'doesn't remember' the changes i have made. and I have to manually change it back:
- menu bar is going back to default (brings back BlueTooth and Time Machine's icons, for example)
- the dock comes back to the default (only apple apps in the specific order, the stock icon beside the trash comes back to be Documents, etc.)
- expose gestures are disabled again (like the default)
2. repeatedly, every time when opening iTunes i see the Software License Agreement, scroll down, agree and iTunes refreshes itself to the default pref (with the ping window and 'iTunes Tutorials' splash screen, prefs like "prevent devices from syncing automatically" are disabled again etc.)
the itunes album artwork screensaver says - there are no album artworks in your itunes library.
3. on Safari, it basicly does the same as with itunes. 'forgets' all the changes. (bookmarks, bookmarks bar is reverted to the default apple,yahoo,googlemaps, forgets the homepage).
4. iphoto - 'iphoto has detected inconsistencies in your library' every time.
Then, with DU i performed a permissions verify:
ACL found but not expected on “Applications/iTunes.app/Contents/Resources/Dutch.lproj/WatchFolderName.strings ”
ACL found but not expected on “Applications/iTunes.app/Contents/Resources/English.lproj/WatchFolderName.strin gs”
ACL found but not expected on “Applications/iTunes.app/Contents/Resources/French.lproj/WatchFolderName.string s”
ACL found but not expected on “Applications/iTunes.app/Contents/Resources/German.lproj/WatchFolderName.string s”
ACL found but not expected on “Applications/iTunes.app/Contents/Resources/Italian.lproj/WatchFolderName.strin gs”
ACL found but not expected on “Applications/iTunes.app/Contents/Resources/Japanese.lproj/WatchFolderName.stri ngs”
ACL found but not expected on “Applications/iTunes.app/Contents/Resources/Spanish.lproj/WatchFolderName.strin gs”
ACL found but not expected on “Applications/iTunes.app/Contents/Resources/cs.lproj/WatchFolderName.strings”
ACL found but not expected on “Applications/iTunes.app/Contents/Resources/da.lproj/WatchFolderName.strings”
ACL found but not expected on “Applications/iTunes.app/Contents/Resources/en_GB.lproj/WatchFolderName.strings ”
ACL found but not expected on “Applications/iTunes.app/Contents/Resources/fi.lproj/WatchFolderName.strings”
ACL found but not expected on “Applications/iTunes.app/Contents/Resources/hu.lproj/WatchFolderName.strings”
ACL found but not expected on “Applications/iTunes.app/Contents/Resources/ko.lproj/WatchFolderName.strings”
ACL found but not expected on “Applications/iTunes.app/Contents/Resources/no.lproj/WatchFolderName.strings”
ACL found but not expected on “Applications/iTunes.app/Contents/Resources/pl.lproj/WatchFolderName.strings”
ACL found but not expected on “Applications/iTunes.app/Contents/Resources/pt.lproj/WatchFolderName.strings”
ACL found but not expected on “Applications/iTunes.app/Contents/Resources/pt_PT.lproj/WatchFolderName.strings ”
ACL found but not expected on “Applications/iTunes.app/Contents/Resources/ru.lproj/WatchFolderName.strings”
ACL found but not expected on “Applications/iTunes.app/Contents/Resources/sv.lproj/WatchFolderName.strings”
ACL found but not expected on “Applications/iTunes.app/Contents/Resources/tr.lproj/WatchFolderName.strings”
ACL found but not expected on “Applications/iTunes.app/Contents/Resources/zh_CN.lproj/WatchFolderName.strings ”
ACL found but not expected on “Applications/iTunes.app/Contents/Resources/zh_TW.lproj/WatchFolderName.strings ”
Warning: SUID file “System/Library/CoreServices/RemoteManagement/ARDAgent.app/Contents/MacOS/ARDAg ent” has been modified and will not be repaired.
And tried to repair with these results:
ACL found but not expected on “Applications/iTunes.app/Contents/Resources/Dutch.lproj/WatchFolderName.strings ”
Repaired “Applications/iTunes.app/Contents/Resources/Dutch.lproj/WatchFolderName.strings ”
ACL found but not expected on “Applications/iTunes.app/Contents/Resources/English.lproj/WatchFolderName.strin gs”
Repaired “Applications/iTunes.app/Contents/Resources/English.lproj/WatchFolderName.strin gs”
ACL found but not expected on “Applications/iTunes.app/Contents/Resources/French.lproj/WatchFolderName.string s”
Repaired “Applications/iTunes.app/Contents/Resources/French.lproj/WatchFolderName.string s”
ACL found but not expected on “Applications/iTunes.app/Contents/Resources/German.lproj/WatchFolderName.string s”
Repaired “Applications/iTunes.app/Contents/Resources/German.lproj/WatchFolderName.string s”
ACL found but not expected on “Applications/iTunes.app/Contents/Resources/Italian.lproj/WatchFolderName.strin gs”
Repaired “Applications/iTunes.app/Contents/Resources/Italian.lproj/WatchFolderName.strin gs”
ACL found but not expected on “Applications/iTunes.app/Contents/Resources/Japanese.lproj/WatchFolderName.stri ngs”
Repaired “Applications/iTunes.app/Contents/Resources/Japanese.lproj/WatchFolderName.stri ngs”
ACL found but not expected on “Applications/iTunes.app/Contents/Resources/Spanish.lproj/WatchFolderName.strin gs”
Repaired “Applications/iTunes.app/Contents/Resources/Spanish.lproj/WatchFolderName.strin gs”
ACL found but not expected on “Applications/iTunes.app/Contents/Resources/cs.lproj/WatchFolderName.strings”
Repaired “Applications/iTunes.app/Contents/Resources/cs.lproj/WatchFolderName.strings”
ACL found but not expected on “Applications/iTunes.app/Contents/Resources/da.lproj/WatchFolderName.strings”
Repaired “Applications/iTunes.app/Contents/Resources/da.lproj/WatchFolderName.strings”
ACL found but not expected on “Applications/iTunes.app/Contents/Resources/en_GB.lproj/WatchFolderName.strings ”
Repaired “Applications/iTunes.app/Contents/Resources/en_GB.lproj/WatchFolderName.strings ”
ACL found but not expected on “Applications/iTunes.app/Contents/Resources/fi.lproj/WatchFolderName.strings”
Repaired “Applications/iTunes.app/Contents/Resources/fi.lproj/WatchFolderName.strings”
ACL found but not expected on “Applications/iTunes.app/Contents/Resources/hu.lproj/WatchFolderName.strings”
Repaired “Applications/iTunes.app/Contents/Resources/hu.lproj/WatchFolderName.strings”
ACL found but not expected on “Applications/iTunes.app/Contents/Resources/ko.lproj/WatchFolderName.strings”
Repaired “Applications/iTunes.app/Contents/Resources/ko.lproj/WatchFolderName.strings”
ACL found but not expected on “Applications/iTunes.app/Contents/Resources/no.lproj/WatchFolderName.strings”
Repaired “Applications/iTunes.app/Contents/Resources/no.lproj/WatchFolderName.strings”
ACL found but not expected on “Applications/iTunes.app/Contents/Resources/pl.lproj/WatchFolderName.strings”
Repaired “Applications/iTunes.app/Contents/Resources/pl.lproj/WatchFolderName.strings”
ACL found but not expected on “Applications/iTunes.app/Contents/Resources/pt.lproj/WatchFolderName.strings”
Repaired “Applications/iTunes.app/Contents/Resources/pt.lproj/WatchFolderName.strings”
ACL found but not expected on “Applications/iTunes.app/Contents/Resources/pt_PT.lproj/WatchFolderName.strings ”
Repaired “Applications/iTunes.app/Contents/Resources/pt_PT.lproj/WatchFolderName.strings ”
ACL found but not expected on “Applications/iTunes.app/Contents/Resources/ru.lproj/WatchFolderName.strings”
Repaired “Applications/iTunes.app/Contents/Resources/ru.lproj/WatchFolderName.strings”
ACL found but not expected on “Applications/iTunes.app/Contents/Resources/sv.lproj/WatchFolderName.strings”
Repaired “Applications/iTunes.app/Contents/Resources/sv.lproj/WatchFolderName.strings”
ACL found but not expected on “Applications/iTunes.app/Contents/Resources/tr.lproj/WatchFolderName.strings”
Repaired “Applications/iTunes.app/Contents/Resources/tr.lproj/WatchFolderName.strings”
ACL found but not expected on “Applications/iTunes.app/Contents/Resources/zh_CN.lproj/WatchFolderName.strings ”
Repaired “Applications/iTunes.app/Contents/Resources/zh_CN.lproj/WatchFolderName.strings ”
ACL found but not expected on “Applications/iTunes.app/Contents/Resources/zh_TW.lproj/WatchFolderName.strings ”
Repaired “Applications/iTunes.app/Contents/Resources/zh_TW.lproj/WatchFolderName.strings ”
Warning: SUID file “System/Library/CoreServices/RemoteManagement/ARDAgent.app/Contents/MacOS/ARDAg ent” has been modified and will not be repaired.
Permissions repair complete
after the repair i did verify again and nothing has really changed.
I'm confuses. what have gone wrong with the permissions, libraries, .plists or account...
it does work better then before the formatting in terms of stabillity (safari used to crash a lot, left click menu is faster now, restarting also)
but of course, I can't live with the fact the system doesn't remember anything I do and acts almost like 'new' everytime I open an app or restart.
is it reversible, repairable, fixable, or should I go with the last preffered option on backing up everything from the Carbon Copy Cloner user.sparseimage I have created before formatting, and maybe revert everithing back, with all of the pros and cons?
Thank you for reading this.
have a nice one
Aviha

I had a similar problem with my Mid-2010 MBP after upgrading to LION and using Target Disk Mode wherein I simply dragged and dropoped my I-tunes Library from my other MBP to the newly updated one. I began getting the same permission error messages when using DU. The problem lies in the UIagent.app as indicated in the log. The ONLY way to correct this problem I found after literally weeks of heartache was to restore my MBP to factory settings and reinstall my apps and OSX in this way, EXACTLY this way: Yes, it may be regarded as overkill to most, but I guarantee that you will be saving yourself umpteen amounts of time and frustration blindly throwing a dart hoping to hit the bullseye. Please read and print this page before you begin.
1. reset PRAM click here to learn how to reset PRAM
2. COMPLETE format hard drive and reinstall of my ORIGINAL Operating System (using the grey installation disks provided to me when i bought the computer).:
Put your install DVD into the optical drive and reboot. As soon as you hear the boot chime, hold down the "c" key on your keyboard (or the Option key until the Install Disk shows up). That will force your MacBook to boot from the install DVD in the optical drive.
When it does start up, you'll see a panel asking you to choose your language. Just press theReturn key on your keyboard once. It will then present you with an Installation window.Completely ignore this window and click on Utilities in the top menu and scroll down to Disk Utility and click it. You should see your hard drive in the left hand column along with your other drives.
Click on the drive and select the Erase tab. Set the format value to Mac OS Extended (Journaled) and click the Erase button. After that has finished select the Partition tab. Type in aName for your hard drive and select how many partitions you want from the Volume Scheme. The usual setting is one partition. Click on the Options button after you've selected apartition to make sure it's set for GUID. Then click the Apply button and after the Partitioning is done quitDisk Utility. You can now follow the instructions on the install screen and install your Operating System (Snow Leopard). DO NOT MIGRATE ANY DATA OR USE TIME MACHINE. INSTALL FROM THE ORIGINAL DISKS ONLY.
After OSX Install, Insert your Applications Install DVD Disk and install.
Now run Software Update from the Apple Menu and update and Install any Updates.
3: Then BEFORE upgrading to LION and BEFORE migrating or copying any data to the new system via whatever source, you need to enable the Root User. But before you do this read here (and read it carefully) to leard about the "root" user.
4. After you are logged in as the Root user, you can now begin installing whatever Applications PACKAGES to your computer individually from either: A.) original cd/dvd install disk (recommended - if you have the disk, use it!), B.) Downloaded from the web (make sure you are using an ethernet/wired connection), C.) previously downloaded Application Package, or D.) by using Target Disk Mode via firewire connected to another Mac Apple doc.#58583. (DO NOT use time machine and do not drag and drop Applications to install - You can drag and drop the packages to the desktop and install but not by moving the wanted Applications Icon into the applications menu).
5. After you have the applications you want installed, run software update again and install any recommended updates.
6. Open Disk Utility and verify/repair the disk permissions. (if no issues are present, go to #7) You need to run repairs at least twice consecutively within the root account, restarting afterwards and logging in as Root again.
7. Open I-Tunes.Open Finder and move your I-Tunes library over by locating the Music folder which contains your music (i.e. /Users/**/Music/iTunes/iTunes Media/Music). DO NOT move the Music folder that is present as a subfolder to the user you are logged in as (i.e.: /Users/**/Music). Make sure it's the folder "Music" that is a subfolder of "I-Tunes Media" which contains all the actual subfolders of your library (i.e.: /Users/jmebenton/Music/iTunes/iTunes Media/Music/30 Seconds to Mars). The Music folder indicated in my example is the one you should drag and drop into your I-Tunes Music Library in the Open I-Tunes window.
8. After your music transfers, Open Disk Utility and verify/repair the disk permissions AGAIN. (if no issues are present, try to repair the permissions anyway) You need to run repairs at least twice consecutively within the root account, restarting afterwards and logging in as Root again.
9. Now transfer any files or data you need. (DO NOT UPGRADE TO LION YET)
10. LOG OUT and LOG IN as an Administrator (not the Root "Other User").
11. Install LION
12. When LION is completely installed, restart and log-in as the Root user.
13. Open Disk Utility and verify/repair the disk permissions AGAIN. (if no issues are present, try to repair the permissions anyway) You need to run repairs at least twice consecutively within the root account, restarting afterwards and logging in as Root again.
14. Disable the root user
Choose Apple menu > System Preferences, and then click Users & Groups.Open Users & Groups preferences
Click the lock icon to unlock it, and then type an administrator name and password.
In the Network Account Server section, click Edit.
Click Open Directory Utility.
Click the lock icon to unlock it, and then enter your administrator name and password.
Choose Edit > Disable Root User.
15. Now Log into your computer and ENJOY!!!

SOLVED - iPhone Bricked by Update Device Driver Not Installed Error 1602

iPhone 4 / Windows 7 x64 / iTunes 9.2.1.5
My iPhone normally interfaces with iTunes on my PC via USB cable without issues.
iTunes prompts to update the iPhone when a new version of iOS is released. Each time, the update has failed as described here: http://support.apple.com/kb/ts1275.
The update process stops, the "Connect to iTunes" screen is all that displays on the phone, and an utterly informative alert message comes up in iTunes along the lines of "Error 1602 (or 1604), The iPhone could not be restored. An unknown error occurred." Along with this, the iPhone ceases to be recognized as a USB device by Windows 7, with a little notification tray pop-up informing me that "Device Driver Software was not successfully installed". The iPhone no longer shows up as a device in iTunes.
The generic troubleshooting steps listed at http://support.apple.com/kb/ts1275 (changing USB ports, changing USB cables, restarting the computer, uninstalling and reinstalling all Apple software, etc., etc.) were a useless waste of time, but following the links for USB troubleshooting led to this page: http://support.apple.com/kb/TS1538
As instructed there, I located the Apple Mobile Device USB Driver in Device Manager. It appeared listed as "Apple Recovery (iBoot) USB driver" with a yellow exclamation point; thus I attempted to reinstall the Apple Mobile Device driver. First I uninstalled the existing driver, then scanned for hardware changes, then tried to update the driver as described. However, the path where the driver files were supposed to be (C:\Program Files (x86)\Common Files\Apple\Mobile Device Support\Driver) did not exist; the Driver folder was missing.
After Googling a little I came across http://discussions.apple.com/thread.jspa?threadID=1949672 and http://discussions.info.apple.com/thread.jspa?messageID=10806341. Following the instructions there, I was able to pull the device drivers (usbaapl64.sys, usbaapl64.cat, usbaapl64.inf and usbaplrc.dll) out of the iTunes installation program (from AppleMobileDeviceSupport64.msi, using WinRAR / Universal Extractor), put them in the previously nonexistent Driver folder and make Windows use the drivers.
Happily, this manual driver reinstall allowed Windows / iTunes to recognize the iPhone and proceed with the update / restore process. I had to repeat the driver reinstall process a couple of times during the iPhone restore - as it progressed, it kept switching the driver back to something nonfunctional - but the restore eventually went through, allowing me to keep my apps, data, history, etc. At least, until the next iOS update.

Hi liam3w,
Please try to reset BIOS, if problem remains, please kindly contact local lenovo for hardware inspection.
Please enter BIOS be pressing F1 in "ThinkPad Screen", F9, then F10.
Fred
T61 + X201i

Lacie drive not mounting after updating to 10.4.8

Hi,
I have a 160gb Lacie d2 external hd, and after updating my OS to 10.4.8 in October, it will not mount. It's recognized in Disk Utility, but will not mount. I've tried repairing disk permissions from both my current OS and from the installer DVD, but it isn't helping and I keep getting the same message.
When I first updated to 10.4.8 in October, my computer had problems re-starting (it would get stuck at the blue boot-up screen), so I had to turn it off by holding the power button. Ever since then, the lacie drive won't mount.
Is there anything else I can do? I've thought about trying Disk Warrior, but if possible I'd like to save the $100 to buy it!
Any advice? I would really appreciate it.

What I think.
The major changes occurred in the 10.4 original Tiger release. Due to the nature of what I believe the problem is 10.4.7 would just be changing how, where and when the issue(s) become most noticeable to you and not solve it. It will leave you hangin' somewhere else. This I/O API does effect everything. I only wanted to finish a movie with iMovie and set some clips at 00:05 f as I have done forever. Bought a new MacBook Pro specifically for OS X.4 and iMovie and all that was over. iMovie as well as many other Universal apps are IMO mostly non functional except at the OS and QT interface. All other Universal apps and devices cause it to choke and sputter as things pass through this very same I/O API that is causing the external HD issues. As for the PB G4, I was believing the age of the machine to be causing these failures then I had noticed many others developing the same issues on newer G4 machines. Most puzzling was the performance hit on the machines with the proper HW especially larger Core Image supported graphics cards as 10.4 has made this a very relevant piece of HW now. The more I read about the how's and why's of the changes in the architecture of the OS in the Developer Connection the more I realized that many issues that seem so unrelated are indeed caused by the same area and or error in this API. iTunes, Safari, iMovie, iPhoto, -.. CPU's, Fans, HD's, jpegs choking G5's and intels-.. plug n play's that worked yesterday not today, same machines/HW new OS.
Photoshop CS and, an extremely resource greedy, 3D Modeling/database application running in Rosetta works fine. Animating 3D graphics on the fly without so much as a stutter everything calm and quiet. Open Safari and the comp gets too hot to handle the fans are screaming just displaying basic window graphics here at the Apple Discussion boards. Most times this is a text only forum for me as the MPB can't even process the window graphics, often the original posts push-pin graphic is the only one that will display.
AFAICT Rosetta is just an application with no graphic user interface and it is not Universal Binary therefore avoiding this I/O kit as it was designed for the specific configuration of the MacIntel only and works fine. Apple's iLife and iWork apps especially, as well as any SW using this I/O Kit API for Universal Binary apps don't work properly. Anyone with a later G4 and especially a G5 with a good, Core Image supported, graphics card should be feeling like they have a new machine, not saying "hey my stuff isn't working anymore" or slow imports of files or processing.
Personally I would:
Start up from 10.3 install discs, back up my docs to external HD and re-partition the internal HD. At least two, IMO three partitions (do not journal OS partitions) would be the least. Install 10.3.9 on one 10.4+ on the (an)other. Docs on the third. Keep the OS partitions as small as possible while allowing for OS's extra "operating space". 3.9 only requires about 2-5 GB's above required space to install while OS 10.4 seems to need 5-10 GB that is always "free" depending on what you are doing and also allowing for any OS and app. updates that may come before the next OS X release. 3.9 is already maxed so one can assume no new news here.
My G4's HD set up is 6 partitions as it is now mainly a slave hub between my MBP and my "legacy" products PB G3, serial devices, Zip drives, modems, SCSI devices, scanners, printers old apps/file formats. Apps and HW that are still useful but "max out" at a certain OS/comp configuration are installed on that OS's partition, i.e. QT w/MPEG-2, Virtual PC, or Photoshop plugins that were never developed or not worth the investment for OS X or the current release as they are not used often enough etc.
5GB-9.2.2, 10GB-10.2, 15GB- 10.3.9, 20GB-10.4.6, 15 GB Apps. 35GB docs. Nothing gets written to any OS partitions unless absolutely required. All OS's share the apps they can (except 9 apps) and document partition. As far as I understand I should be able to use XGrid to use these other computers processors through the MBP. A "super computer" kind of set up with the G4 at the least, but documentation indicates it should work on any OS X so possibly my G3 as well which stopped at 10.1.
You do not have to duplicate apps and I would install and update all through 3.9 even if you install them in the 10.4 Apps. folder. At most you may need to create a couple of folders in the OS's System Library for Application Support or plug-ins etc. If you fear one OS reading from the other's Library/System files you can unmount the other OS volumes but I have yet to see this happen without intentionally directing the OS to do so.
I would do all my external back ups and device communication (cameras, HD's MIDI's etc) booting in 10.3 only. For me the G4 booted in Target disk mode seems to be the safest way to access an "external HD" via FW with the MBP. I have had zero problems with this method. A two step process for files that don't reside on the G4 but I'd rather be safe than sorry and I have already lost one HD that was completely unrecoverable (a mechanical rebuild lead to the discovery of overwritten files with driver type data and damaged disk surface from arcing). Small files I just access on the external HD's through G4 over the airport network. I have not used Bonjour in depth yet though will most likely incorporate that into everyday use as I was able to quickly transfer a few very large files to a friends MacBook with it. Used this Just after realizing the MBP lacks IRDA and neither of us had any cables with us.
The above type of configuration would give you the ability to move forward with 10.4 and easily work around HW, SW and connectivity issues by booting into 10.3 when needed. This is a great way of trouble shooting OS and app issues. My MBP already has a partition waiting for Leopard. If the OS lacks something or has problems of it's own I can boot back into 10.4 quickly and easily. If all is well with Leopard 10.4 will definitely be removed. The G4 will never see Leopard except over a network.
Sorry to be long winded. Hope this gives you some reasonable ideas. In a nutshell. I believe the problem is that the OS and QT are set to higher, more accurate standards (ISO's MPEG's, SMTP's, IEEE's etc) than in the past and the I/O API is unable to communicate/calculate and transfer the information properly between devices and apps.
BTW when your LaCie appears to have given up the ghost and will not respond at all, before you toss the whole thing remove the HD and put it in a different enclosure. I have dealt with hundreds of these and the Firewire ports on the PC board become too hot and melt off. Repair is not possible and although this is a known issue with LaCie no attempts have been made to correct this and they will not sell you a service part to repair it. Replacement would require removal and replacement of two screws and two plugs. Most HD's I have removed are Western HD's and work fine in a new enclosure.
HTH

Device driver permissions reset after modunload in /etc/rc3

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