System Hangs - requires power off, then panic

I have a mac mini that runs all the time at a weekend house. I can access it remotely using Apple Remote Desktop. Recently, the Mini has started to hang. It runs (all lights on) but screen goes dark and machine cannot be ping'ed on network. I tried unplugging all USB and Firewire devices but to no avail. I cannot tell what cause the hang/crash. There is no Panic in the Console Log at time of hang. There is a panic that gets listed at start-up though. This has happened three time now so I am a bit concerned. The last time it happened Oct 30 and machine was reset Nov 6. From the System Log:
Oct 30 16:17:18 HamptonsMacintosh-4 Mail[281]: Mail: SafetyNet not needed - wrongState:0
Oct 30 16:22:21 HamptonsMacintosh-4 Mail[281]: Mail: SafetyNet not needed - wrongState:0
Nov 6 11:48:40 localhost com.apple.launchd[1]: * launchd[1] has started up. *
Nov 6 11:48:48 localhost DirectoryService[11]: Improper shutdown detected
Nov 6 11:49:02 localhost mDNSResponder[17]: mDNSResponder mDNSResponder-212.1 (Jul 24 2009 22:34:12) starting
From the panic log (despite date, I believe panic occurred Oct 30):
Interval Since Last Panic Report: 691148 sec
Panics Since Last Report: 1
Anonymous UUID: 79D32392-DC2F-49F2-A9DD-5B9852CAA32B
Fri Nov 6 11:49:07 2009
panic(cpu 0 caller 0x226297): "thread_invoke: preemption_level -1, possible cause: unlocking an unlocked mutex or spinlock"@/SourceCache/xnu/xnu-1456.1.25/osfmk/kern/sched_prim.c:1471
Backtrace (CPU 0), Frame : Return Address (4 potential args on stack)
0x2e96be28 : 0x21acfa (0x5ce650 0x2e96be5c 0x223156 0x0)
0x2e96be78 : 0x226297 (0x5864e8 0xffffffff 0x586480 0x225b6c)
0x2e96bef8 : 0x22699d (0x6a1c01c 0x0 0x2e96bf28 0x1)
0x2e96bf68 : 0x218953 (0x29c655 0x0 0x1 0x4ed682)
0x2e96bfa8 : 0x2a5a07 (0xffffffff 0x1 0x2e96bfc8 0x6957dc4)
0x2e96bfc8 : 0x29c866 (0x0 0x0 0x10 0x6957dc4)
BSD process name corresponding to current thread: CIJScannerRegist
Mac OS version:
10B504
Kernel version:
Darwin Kernel Version 10.0.0: Fri Jul 31 22:47:34 PDT 2009; root:xnu-1456.1.25~1/RELEASE_I386
System model name: Macmini1,1 (Mac-F4208EC8)
System uptime in nanoseconds: 708622302930346
unloaded kexts:
com.apple.driver.AppleFileSystemDriver 2.0 (addr 0x34c5f000, size 0x12288) - last unloaded 273627445524
loaded kexts:
com.cisco.nke.ipsec 2.0.1
com.parallels.kext.prl_vnic 4.0 3846.436204
com.parallels.kext.prl_netbridge 4.0 3846.436204
com.parallels.kext.prlusbconnect 4.0 3846.436204
com.parallels.kext.prlhidhook 4.0 3846.436204
com.parallels.kext.prl_hypervisor 4.0 3846.436204
com.apple.filesystems.smbfs 1.6.0 - last loaded 137610259707
com.apple.filesystems.afpfs 9.5
com.apple.nke.asp_tcp 5.0
com.apple.filesystems.autofs 2.1.0
com.apple.DontSteal_Mac_OSX 7.0.0
com.apple.driver.AppleUpstreamUserClient 3.0.5
com.apple.driver.AppleIntelGMA950 6.0.2
com.apple.driver.AppleHDA 1.7.4a1
com.apple.driver.AudioIPCDriver 1.1.0
com.apple.driver.AppleLPC 1.4.6
com.apple.driver.AppleIntelIntegratedFramebuffer 6.0.2
com.apple.iokit.AppleYukon2 3.1.14b1
com.apple.driver.AirPort.Atheros 411.19.4
com.apple.driver.AppleIRController 161
com.apple.driver.ACPISMCPlatformPlugin 3.4.0a20
com.apple.driver.AppleIntelMeromProfile 19
com.apple.driver.Oxford_Semi 2.5.0
com.apple.iokit.SCSITaskUserClient 2.5.1
com.apple.driver.AppleUSBHub 3.7.8
com.apple.BootCache 31
com.apple.AppleFSCompression.AppleFSCompressionTypeZlib 1.0.0d1
com.apple.driver.AppleUSBEHCI 3.7.5
com.apple.driver.AppleEFINVRAM 1.3.0
com.apple.iokit.IOAHCIBlockStorage 1.5.0
com.apple.driver.AppleFWOHCI 4.3.4
com.apple.driver.AppleAHCIPort 2.0.0
com.apple.driver.AppleIntelPIIXATA 2.5.0
com.apple.driver.AppleUSBUHCI 3.7.5
com.apple.driver.AppleRTC 1.3
com.apple.driver.AppleHPET 1.4
com.apple.driver.AppleACPIButtons 1.3
com.apple.driver.AppleSMBIOS 1.4
com.apple.driver.AppleACPIEC 1.3
com.apple.driver.AppleAPIC 1.4
com.apple.security.sandbox 0
com.apple.security.quarantine 0
com.apple.nke.applicationfirewall 2.0.11
com.apple.driver.AppleIntelCPUPowerManagementClient 90.0.0
com.apple.driver.AppleIntelCPUPowerManagement 90.0.0
com.apple.driver.AppleHIDMouse 1.3.0f1
com.apple.driver.IOBluetoothHIDDriver 2.2.1f7
com.apple.driver.AppleProfileReadCounterAction 17
com.apple.driver.AppleProfileTimestampAction 10
com.apple.driver.AppleProfileThreadInfoAction 14
com.apple.driver.AppleProfileRegisterStateAction 10
com.apple.driver.AppleProfileKEventAction 10
com.apple.driver.AppleProfileCallstackAction 20
com.apple.iokit.IOSurface 73.0
com.apple.iokit.IOBluetoothSerialManager 2.2.1f7
com.apple.iokit.IOSerialFamily 10.0.2
com.apple.driver.DspFuncLib 1.7.4a1
com.apple.iokit.IOAudioFamily 1.7.0fc16
com.apple.kext.OSvKernDSPLib 1.3
com.apple.iokit.IONDRVSupport 2.0
com.apple.iokit.IOGraphicsFamily 2.0
com.apple.iokit.IOFireWireIP 2.0.3
com.apple.iokit.IO80211Family 300.20
com.apple.iokit.IONetworkingFamily 1.8
com.apple.iokit.IOUSBHIDDriver 3.7.5
com.apple.driver.AppleHDAController 1.7.4a1
com.apple.iokit.IOHDAFamily 1.7.4a1
com.apple.driver.IOPlatformPluginFamily 3.4.0a20
com.apple.driver.AppleSMC 3.0.1d2
com.apple.iokit.AppleProfileFamily 40
com.apple.driver.AppleUSBMergeNub 3.7.5
com.apple.driver.CSRUSBBluetoothHCIController 2.2.1f7
com.apple.driver.AppleUSBBluetoothHCIController 2.2.1f7
com.apple.iokit.IOBluetoothFamily 2.2.1f7
com.apple.driver.AppleUSBComposite 3.7.5
com.apple.iokit.IOSCSIReducedBlockCommandsDevice 2.5.1
com.apple.iokit.IOFireWireSerialBusProtocolTransport 2.0.0
com.apple.iokit.IOFireWireSBP2 4.0.5
com.apple.iokit.IOSCSIMultimediaCommandsDevice 2.5.1
com.apple.iokit.IOBDStorageFamily 1.6
com.apple.iokit.IODVDStorageFamily 1.6
com.apple.iokit.IOCDStorageFamily 1.6
com.apple.driver.XsanFilter 402.1
com.apple.iokit.IOUSBUserClient 3.7.5
com.apple.iokit.IOATAPIProtocolTransport 2.5.0
com.apple.iokit.IOSCSIArchitectureModelFamily 2.5.1
com.apple.iokit.IOFireWireFamily 4.1.7
com.apple.iokit.IOAHCIFamily 2.0.0
com.apple.iokit.IOATAFamily 2.5.0
com.apple.iokit.IOUSBFamily 3.7.8
com.apple.driver.AppleEFIRuntime 1.3.0
com.apple.iokit.IOHIDFamily 1.6.0
com.apple.iokit.IOSMBusFamily 1.1
com.apple.security.TMSafetyNet 6
com.apple.kext.AppleMatch 1.0.0d1
com.apple.driver.DiskImages 281
com.apple.iokit.IOStorageFamily 1.6
com.apple.driver.AppleACPIPlatform 1.3
com.apple.iokit.IOPCIFamily 2.6
com.apple.iokit.IOACPIFamily 1.3.0
System Profile:
Model: Macmini1,1, BootROM MM11.0055.B08, 2 processors, Intel Core 2 Duo, 2.16 GHz, 2 GB, SMC 1.3f4
Graphics: Intel GMA 950, GMA 950, Built-In, spdisplaysintegratedvram
Memory Module: global_name
AirPort: spairportwireless_card_type_airportextreme (0x168C, 0x86), Atheros 5424: 2.0.19.4
Bluetooth: Version 2.2.1f7, 2 service, 1 devices, 1 incoming serial ports
Network Service: Built-in Ethernet, Ethernet, en0
Network Service: Parallels Shared Networking Adapter, Ethernet, en4
Network Service: Parallels Host-Only Networking Adapter, Ethernet, en5
Serial ATA Device: ST9320421AS, 298.09 GB
Parallel ATA Device: MATSHITADVD-R UJ-846
USB Device: USB2.0 Hub, 0x05e3 (Genesys Logic, Inc.), 0x0608, 0xfd300000
USB Device: Hub, 0x2001, 0xf103, 0xfd100000
USB Device: USB RECEIVER, 0x046d (Logitech Inc.), 0xc50e, 0xfd110000
USB Device: SmartHome PowerLinc USB E, 0x10bf, 0x0004, 0xfd160000
USB Device: Bluetooth USB Host Controller, 0x05ac (Apple Inc.), 0x8205, 0x7d100000
USB Device: IR Receiver, 0x05ac (Apple Inc.), 0x8240, 0x7d200000
USB Device: Back-UPS RS 1200 FW:8.g3 .D USB FW:g3, 0x051d (American Power Conversion), 0x0002, 0x5d200000
USB Device: USB Hub, 0x05e3 (Genesys Logic, Inc.), 0x0604, 0x5d100000
USB Device: hp LaserJet 3030, 0x03f0 (Hewlett Packard), 0x1817, 0x5d160000
FireWire Device: Newer Tech miniStack V2, Newer Technology, Up to 400 Mb/sec
FireWire Device: Newer Tech miniStack V2, Newer Technology, Up to 400 Mb/sec
any ideas what is going on?

Just happened again last night (11/25). Machine stops responding and screen is dark. Happens while Mac Mini is unattended so I cannot say exactly what the cause it. I went through every log in the console and the last entry was:
2009-11-25 19:46:55:791|SyncServer|60712|c10f10|Server|Info| Goodnight, Gracie.
The last file saved on my harddrive (from Indigo events window) was :
2009-11-25 19:39:08 RCS The MasterBedroomTemperature is 58 degrees.
I came to machine after I could not remote into into, fond screen dark and all I could do was restart. Restart came with typical panic message, but it was dated 11/26 (after poweroff restart). I do not know why I keep freezing, but it has happened about 5 times over last 3 months.
Thu Nov 26 22:57:28 2009
panic(cpu 0 caller 0x226820): "thread_invoke: preemption_level -1, possible cause: unlocking an unlocked mutex or spinlock"@/SourceCache/xnu/xnu-1486.2.11/osfmk/kern/sched_prim.c:1471
Backtrace (CPU 0), Frame : Return Address (4 potential args on stack)
0x2effb998 : 0x21b2bd (0x5cf868 0x2effb9cc 0x223719 0x0)
0x2effb9e8 : 0x226820 (0x5876cc 0xffffffff 0x587664 0x225ec4)
0x2effba68 : 0x226f27 (0x71957c4 0x0 0x0 0xffffffff)
0x2effbad8 : 0x226fb5 (0x0 0x0 0x0 0x71957a8)
0x2effbaf8 : 0x21191c (0x0 0x0 0xffffffff 0x0)
0x2effbb28 : 0x21dd51 (0x9a4b2b4 0x0 0xffffffff 0x0)
0x2effbb88 : 0x21de4c (0x2effbbc4 0x5c 0x2c 0x0)
0x2effbba8 : 0x23d0dd (0x2effbbc4 0x5c 0x2c 0x0)
0x2effbc38 : 0x21b5a9 (0x45a7460 0x72394d0 0x7585b90 0x1)
0x2effbee8 : 0x21b8db (0x71957a8 0x1 0x2effbfa0 0x2)
0x2effbf38 : 0x2a744f (0x1 0x2effbfa0 0x2 0x1)
0x2effbfc8 : 0x29d7ca (0x6a93dc4 0x1 0x10 0x6a93dc4)
BSD process name corresponding to current thread: CIJScannerRegist
Mac OS version:
10C540
Kernel version:
Darwin Kernel Version 10.2.0: Tue Nov 3 10:37:10 PST 2009; root:xnu-1486.2.11~1/RELEASE_I386
System model name: Macmini1,1 (Mac-F4208EC8)
System uptime in nanoseconds: 519779320850528
unloaded kexts:
com.apple.driver.AppleFileSystemDriver 2.0 (addr 0x2eeca000, size 0x12288) - last unloaded 278846161337
loaded kexts:
com.cisco.nke.ipsec 2.0.1
com.parallels.kext.prl_vnic 4.0 3846.436204
com.parallels.kext.prl_netbridge 4.0 3846.436204
com.parallels.kext.prlusbconnect 4.0 3846.436204
com.parallels.kext.prlhidhook 4.0 3846.436204
com.parallels.kext.prl_hypervisor 4.0 3846.436204
com.apple.filesystems.smbfs 1.6.0 - last loaded 210704943409
com.apple.filesystems.afpfs 9.6
com.apple.nke.asp_tcp 5.0
com.apple.filesystems.autofs 2.1.0
com.apple.DontSteal_Mac_OSX 7.0.0
com.apple.driver.AppleIntelGMA950 6.0.6
com.apple.driver.AudioIPCDriver 1.1.2
com.apple.driver.AppleHDA 1.7.9a4
com.apple.driver.AppleUpstreamUserClient 3.1.0
com.apple.driver.AppleIntelIntegratedFramebuffer 6.0.6
com.apple.iokit.AppleYukon2 3.1.14b1
com.apple.driver.AirPort.Atheros 412.19.4
com.apple.driver.AppleIntelMeromProfile 19
com.apple.driver.ACPISMCPlatformPlugin 4.0.1d0
com.apple.driver.AppleLPC 1.4.9
com.apple.driver.AppleIRController 251.1.4
com.apple.driver.Oxford_Semi 2.5.1
com.apple.iokit.SCSITaskUserClient 2.6.0
com.apple.iokit.IOAHCIBlockStorage 1.6.0
com.apple.driver.AppleUSBHub 3.8.4
com.apple.BootCache 31
com.apple.AppleFSCompression.AppleFSCompressionTypeZlib 1.0.0d1
com.apple.driver.AppleAHCIPort 2.0.1
com.apple.driver.AppleIntelPIIXATA 2.5.0
com.apple.driver.AppleEFINVRAM 1.3.0
com.apple.driver.AppleUSBEHCI 3.7.5
com.apple.driver.AppleFWOHCI 4.4.0
com.apple.driver.AppleUSBUHCI 3.7.5
com.apple.driver.AppleRTC 1.3
com.apple.driver.AppleHPET 1.4
com.apple.driver.AppleACPIButtons 1.3
com.apple.driver.AppleSMBIOS 1.4
com.apple.driver.AppleACPIEC 1.3
com.apple.driver.AppleAPIC 1.4
com.apple.driver.AppleIntelCPUPowerManagementClient 96.0.0
com.apple.security.sandbox 0
com.apple.security.quarantine 0
com.apple.nke.applicationfirewall 2.1.11
com.apple.driver.AppleIntelCPUPowerManagement 96.0.0
com.apple.driver.IOBluetoothHIDDriver 2.2.4f3
com.apple.driver.AppleProfileReadCounterAction 17
com.apple.driver.AppleProfileTimestampAction 10
com.apple.driver.AppleProfileThreadInfoAction 14
com.apple.driver.AppleProfileRegisterStateAction 10
com.apple.driver.AppleProfileKEventAction 10
com.apple.driver.AppleProfileCallstackAction 20
com.apple.iokit.IOSurface 73.0
com.apple.iokit.IOBluetoothSerialManager 2.2.4f3
com.apple.iokit.IOSerialFamily 10.0.3
com.apple.driver.DspFuncLib 1.7.9a4
com.apple.iokit.IOAudioFamily 1.7.2fc1
com.apple.kext.OSvKernDSPLib 1.3
com.apple.iokit.IOFireWireIP 2.0.3
com.apple.iokit.IO80211Family 310.6
com.apple.iokit.IONetworkingFamily 1.9
com.apple.iokit.AppleProfileFamily 41
com.apple.driver.AppleHDAController 1.7.9a4
com.apple.iokit.IOHDAFamily 1.7.9a4
com.apple.driver.AppleSMC 3.0.1d2
com.apple.driver.IOPlatformPluginFamily 4.0.1d0
com.apple.iokit.IONDRVSupport 2.0
com.apple.iokit.IOGraphicsFamily 2.0
com.apple.driver.AppleUSBMergeNub 3.8.5
com.apple.driver.CSRUSBBluetoothHCIController 2.2.4f3
com.apple.driver.AppleUSBBluetoothHCIController 2.2.4f3
com.apple.iokit.IOBluetoothFamily 2.2.4f3
com.apple.iokit.IOUSBHIDDriver 3.8.4
com.apple.driver.AppleUSBComposite 3.7.5
com.apple.iokit.IOSCSIBlockCommandsDevice 2.6.0
com.apple.iokit.IOSCSIReducedBlockCommandsDevice 2.6.0
com.apple.iokit.IOFireWireSerialBusProtocolTransport 2.0.0
com.apple.iokit.IOFireWireSBP2 4.0.5
com.apple.iokit.IOSCSIMultimediaCommandsDevice 2.6.0
com.apple.iokit.IOBDStorageFamily 1.6
com.apple.iokit.IODVDStorageFamily 1.6
com.apple.iokit.IOCDStorageFamily 1.6
com.apple.driver.XsanFilter 402.1
com.apple.iokit.IOATAPIProtocolTransport 2.5.0
com.apple.iokit.IOSCSIArchitectureModelFamily 2.6.0
com.apple.iokit.IOUSBUserClient 3.8.5
com.apple.iokit.IOAHCIFamily 2.0.2
com.apple.iokit.IOATAFamily 2.5.0
com.apple.iokit.IOFireWireFamily 4.1.7
com.apple.iokit.IOUSBFamily 3.8.5
com.apple.driver.AppleEFIRuntime 1.3.0
com.apple.iokit.IOHIDFamily 1.6.1
com.apple.iokit.IOSMBusFamily 1.1
com.apple.security.TMSafetyNet 6
com.apple.kext.AppleMatch 1.0.0d1
com.apple.driver.DiskImages 281
com.apple.iokit.IOStorageFamily 1.6
com.apple.driver.AppleACPIPlatform 1.3
com.apple.iokit.IOPCIFamily 2.6
com.apple.iokit.IOACPIFamily 1.3.0

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Regards,
Jin Li
May this year, be the year of 'DO'!
I am a volunteer, and not a paid staff of Lenovo or Microsoft

Firefox will disable my HP L7680( error message " turn power off then on again") when using either the printer icon or print in file pull down. .

This happens for em & other print request in my online brokerage account. It has no problem printing PDF files. When the message appears, four lights start blinking at the same time on the auto answer button, on off button, lower SD slot, and the light under the OK button with the directional tabs. At that point I have to power down the printer and change to ie8 to print these. My ie8 browser has no problems with any printing, but it does not function when trying to add notes in my Comcast address book

Mowaffaq, you may want to determine whether you are making those changes in the master printing preferences (versus the adjusting the session printing preferences from within your application).
Click "Start", click "Printers and Faxes" (or "Devices and Printers"), right-click your printer, and select "Printing Preferences". On the "Paper/Quality" tab, you should be able to specify A4 as your default paper for all future print jobs.
Hope that helps.

IMac G5 system hang - 2 bad 1GB memory modules?

I am experiencing intermittent system hangs, requiring power off / on to recover. Applications run fine for hours, then everything freezes; a few seconds later the fans spool up full bore. There seems to be no logic to the failure. It happens on many different applications, including Disk Utility. No new software has been added recently (other than Apple software updates). This has been occuring for several weeks.
I repair permissions & run disk verify. When disk utility runs completely without hanging (on verify), everything is ok.
Applecare had me trash the ~/Library/Caches & system caches. No joy. They recommended archive & install beginning with Panther. Reinstall went ok until downloading updates for 10.4.8, then hang (might this suggest a hardware prob?).
Rebooted in target firewire mode the cloned drive, then zero'ed the G5 HDD and restored from clone (SuperDuper!). Everything appeared ok for several days, then the same system hang reappeared. I should mention that in the course of sudying this one, I discovered Virex 7.5 was sucking the processing life from the G5; used the uninstaller to get rid of it & the iMac is quiet again!
I have run the Applecare version of Techtools and the Hardware Test Disk, everything passes.
I could do a clean install of Tiger, then use migration assistant to move data from the clone...if I felt it had a chance to solve it. On the other hand, maybe its a flaky hardware gremlin and I'm wasting my time doing reinstalls, and I should hustle it over to the local Apple store.
Update - took iMac for service at Apple store where it failed under stress test with my 2 GB of memory but ran for an extended period with Apple memory. In an attempt to isolate which of the two 1 GB modules was bad, removed one module. Identical failure after 24 hrs. Howver, swapping out that failing module with the second module, identical hand. That suggests either both 1 GB modules are bad (unikely), or some other hardware issue is the problem.
Problem seems to occur most often when starting playing iTunes, or running Disk Utility (repair permissions).
I suppose the next step is to buy 1 GB of memory from Apple and make it fail again. Any suggestions?

Thank you for your posts, I appreciate it.
Skip - I tried a spare keyboard & mouse. Still failed.
MGW - all software is up to date.
DaddyPaycheck - I downloaded memtestosx. It fails testing each 1GB memory module separately (in different sockets). I'm running in multiuser mode and when it fails the entire iMac freezes up (just like it always does), requiring power off / power on. Is this normal behavior when the memtestosx test fails?
I will plan to test in single user mode as the supplied doc states that if the onboard cache is failing it would pass singleuser (cache apparently disabled in singleuser mode) but fail multiuser. Maybe the onboard cache is bad?
Thanks.

Monitor flickering requires power unplug/replug

I'm using an HP w2558hc monitor on a T60 running Windows XP Professional with an ATI Mobility Radeon X1400 display adapter. Everytime I reboot the laptop there's a rapid left/right jiggling of the display, which is noticeable enough but more so when you look toward the edges of the screen. By trial and error I found if I unplug the monitor from the wall power outlet, wait 10 seconds and plug it back in the problem goes away until the next reboot.
HP tells me it must be the laptop's display adapter because they had me plug the monitor into an old Dell 2100 tower I had hanging around (Windows 2000 on an Intel 810 graphics card) and it did not exhibit the problem (albeit that 10 yo PC only went to 1600 x 1200). Also because the flickering doesn't start until the Win logon prompt appears, which is when they say the graphics adapter kicks in. And theres no flicker if I turn the monitor on without connecting it to the laptop to display the "No Video Input" message.
I have tried the following remedies without success.
- Updated the T60 graphics driver to the most recent one Windows Update could find (version 8.362.0.0, 4/5/2007)
- Uninstalled the HP driver and went plug and play
I posted this if case anyone has a similar problem, at least I found a workaround. The unplug option is only slightly annoying, although if the adapter is truly at fault I can't see why unplugging the power cord stops the shaking. (Simpy cycling the monitor off and on with the power switch won't fix it. I power off, then unplug.)
If anyone has any other ideas I might try I'd be glad to hear them. Lenovo hardware support suggested I try installing the Presentation Director, has anyone fixed any similar problems that way?

My problem is that unplugging the monitor does not help.
By changing the resolution a few times I can fix the screen flicker problem but then get a single verticle line of horizontal lines on the right side of my monitor that increase in speed as time goes by.
It is the lesser of two evils so I just use 5/6 of my monitor and cannot see the lines against a black background.

Problem to power off desktop computer

Hi,
By the time Arch Linux were switching to kernel 3.0 my system stopped to power off after some update.
The OS halts, but the computer do not turn off.
My dekstop is a Intel Core i5 with a Gigabyte GA-H55M motherboard.
What else information need I provide?
Thanks in advance :-)

"You need to restart your computer" (kernel panic) message appears ...

I have an iPhone 4s. After upgrading to iOS 6 (and 6.0.1) my sound occasionally just stops working and I have to power off/on to get it back working again. Anyone else having this issue?

My sounds occasionally stops working after upgrading to iOS 6. Is anyone else having sound issues with iOS 6 or greater?

I am having this same issue on my iPhone 4. The most recent update to iOS 6.1 didn't fix it either. Has anyone found a fix for this problem? It doesn't happen often, maybe every third day or so but requires power off, power on to bring the sound back.

Can't Slide to power off

my ipad 2 is 16G 3G,
yesterday, i update my ipad 2 via itunes from 4.3.5 to 5.1 then i can't "slide to power off", it just restart to operate.
then i use a clean desktop to update, it still happen...
anyone can help me....

I understand what the problem is. Did you try to reset the iPad? After you reset it you should be able to power the device off completely.
If you tried the reset and you still cannot use the slide to power off, then you have another issue. But you have to try the reset, hold down both buttons - wait for the apple logo to appear on the screen - let go of th buttons and let the iPad restart completely - then try to power off.
Did you do all of that?

System Hangs - requires power off, then panic

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