Your Computer Needs to be Restarted

Been getting random freezing and locking up for a few days now.
A black line will scroll down the screen, the computer will lock up completely and then COH will display the message "Your computer needs to be restarted, press the power button until it turns off", repeated in multiple languages.

Sure enough the only way to resolve is to power off.
Had hoped that the Mac client would be more stable than the Windows one, but somehow it manages to totally lock up OSX as well lol

Anyone know what is causing this very annoying message?

Running 27inch iMac, 8gb RAM, Radeon 4850, 2.8ghz core i7

Is there something I should be doing or NOT doing to prevent COH from totally locking up my system?

Nearly every time there are "kernel panics" during heavy memory usage, the problem is either a disk error or bad RAM. Try running Disk Utility's Verify Disk to see if there are problems first. If you installed any 3rd party (non factory) RAM, remove it and see if the crashes stop.

If neither of those help it could also be caused by something that loads at startup. That will take a lot more troubleshooting to figure out.

Disk Utility reported no errors with the disk. There is no non standard RAM installed - 8gb straight out of the box from Apple.
There are no login items starting automatically with my account.
As far as I can see there is nothing 3rd party running at all. Just OSX components and COH.

Dont see how it can be anything other than COH itself causing the problem. Most of the time when this happens i just get the black line scrolling down and the system locks up.
Have only seen the computer must be restarted error twice, usually just locks without warning.

Have installed all available OSX updates. Was worried that perhaps it was overheating - back of the unit was REALLY hot, but running a program to turn the fan speed up does not solve the problem either (although the computer is much cooler to the touch)

Has anyone else encountered this problem with the new imacs?
Any suggestions?

Launch Console (Applications > Utilities) and click Show Log List. Work your way through the list - you're looking for a section called PanicReporter. There should be at least one log in there reporting on your last kernel panic.

Those logs are usually short - copy and paste its contents here. Don't delete the log afterward, because if something's wrong Apple will need it to diagnose what happened.

While I read that, run Software Update - there was a graphics update released a few days ago from Apple, that might solve the problem too.

This is the latest Kernel Panic report (Just happened)

Sun Aug 22 20:56:51 2010
panic(cpu 4 caller 0x2269f0): "thread_invoke: preemption_level -1, possible cause: unlocking an unlocked mutex or spinlock"@/SourceCache/xnu/xnu-1504.7.4/osfmk/kern/sched_prim.c:1476
Backtrace (CPU 4), Frame : Return Address (4 potential args on stack)
0x850d3e28 : 0x21b455 (0x5cf328 0x850d3e5c 0x2238b1 0x0)
0x850d3e78 : 0x2269f0 (0x58712c 0xffffffff 0x5870c4 0x2265b1)
0x850d3ef8 : 0x2270f6 (0xcfed7c4 0xcfed7c4 0x850d3f58 0x232823)
0x850d3f68 : 0x227161 (0x547cbe 0xd021580 0x0 0x7bdad000)
0x850d3f88 : 0x547d7a (0x547cbe 0xd021580 0x13cf1b20 0x0)
0x850d3fc8 : 0x29e6cc (0xd021580 0x0 0x10 0xe5cfa80)

BSD process name corresponding to current thread: kernel_task

Mac OS version:
10F569

Kernel version:
Darwin Kernel Version 10.4.0: Fri Apr 23 18:28:53 PDT 2010; root:xnu-1504.7.4~1/RELEASE_I386
System model name: iMac11,1 (Mac-F2268DAE)

System uptime in nanoseconds: 17667707765984
unloaded kexts:
com.apple.driver.AppleFileSystemDriver 2.0 (addr 0xdc8000, size 0x12288) - last unloaded 123402920646
loaded kexts:
com.regularrateandrhythm.driver.RowmoteIREmu 1.0
com.bresink.driver.BRESINKx86Monitoring 6.0
com.belkin.driver.n52te 1.0.2
com.apple.driver.AppleBluetoothMultitouch 51.2 - last loaded 1515258392133
com.apple.filesystems.autofs 2.1.0
com.apple.filesystems.ntfs 3.2
com.apple.driver.AGPM 100.12.12
com.apple.driver.AppleHWSensor 1.9.3d0
com.apple.driver.AppleMikeyHIDDriver 1.2.0
com.apple.driver.AppleUpstreamUserClient 3.3.2
com.apple.driver.AppleHDA 1.8.7f1
com.apple.kext.ATIFramebuffer 6.1.8
com.apple.driver.AppleMikeyDriver 1.8.7f1
com.apple.driver.AudioAUUC 1.4
com.apple.ATIRadeonX2000 6.1.8
com.apple.Dont_Steal_Mac_OS_X 7.0.0
com.apple.iokit.CHUDUtils 201
com.apple.iokit.CHUDProf 214
com.apple.driver.AudioIPCDriver 1.1.2
com.apple.driver.AirPort.Atheros21 423.9.9
com.apple.driver.ACPI_SMC_PlatformPlugin 4.1.2b1
com.apple.driver.AppleLPC 1.4.12
com.apple.driver.AppleBacklight 170.0.24
com.apple.driver.AppleIRController 303.8
com.apple.driver.AppleUSBCardReader 2.5.4
com.apple.iokit.SCSITaskUserClient 2.6.5
com.apple.BootCache 31
com.apple.AppleFSCompression.AppleFSCompressionTyp eZlib 1.0.0d1
com.apple.iokit.IOAHCIBlockStorage 1.6.2
com.apple.driver.AppleFWOHCI 4.7.1
com.apple.driver.AppleUSBHub 4.0.0
com.apple.driver.AppleEFINVRAM 1.3.0
com.apple.iokit.AppleBCM5701Ethernet 2.3.8b2
com.apple.driver.AppleUSBEHCI 4.0.2
com.apple.driver.AppleUSBUHCI 4.0.2
com.apple.driver.AppleAHCIPort 2.1.2
com.apple.driver.AppleACPIButtons 1.3.2
com.apple.driver.AppleRTC 1.3.1
com.apple.driver.AppleHPET 1.5
com.apple.driver.AppleSMBIOS 1.6
com.apple.driver.AppleACPIEC 1.3.2
com.apple.driver.AppleAPIC 1.4
com.apple.driver.AppleIntelCPUPowerManagementClien t 105.10.0
com.apple.security.sandbox 0
com.apple.security.quarantine 0
com.apple.nke.applicationfirewall 2.1.11
com.apple.driver.AppleIntelCPUPowerManagement 105.10.0
com.apple.driver.AppleMultitouchDriver 204.13
com.apple.driver.AppleBluetoothHIDKeyboard 1.2.0a3
com.apple.driver.IOBluetoothHIDDriver 2.3.3f8
com.apple.driver.AppleHIDKeyboard 1.2.0a3
com.apple.driver.AppleProfileReadCounterAction 17
com.apple.driver.DspFuncLib 1.8.7f1
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.driver.AppleSMBusController 1.0.8d0
com.apple.kext.ATI4800Controller 6.1.8
com.apple.kext.ATISupport 6.1.8
com.apple.iokit.IOFireWireIP 2.0.3
com.apple.iokit.IOSurface 74.0
com.apple.iokit.IOBluetoothSerialManager 2.3.3f8
com.apple.iokit.IOSerialFamily 10.0.3
com.apple.iokit.CHUDKernLib 207
com.apple.iokit.IOAudioFamily 1.7.6fc2
com.apple.kext.OSvKernDSPLib 1.3
com.apple.driver.AppleHDAController 1.8.7f1
com.apple.iokit.IOHDAFamily 1.8.7f1
com.apple.iokit.IO80211Family 311.1
com.apple.iokit.AppleProfileFamily 41
com.apple.driver.AppleSMC 3.0.1d2
com.apple.driver.IOPlatformPluginFamily 4.1.2b1
com.apple.driver.AppleSMBusPCI 1.0.8d0
com.apple.iokit.IONDRVSupport 2.1
com.apple.iokit.IOGraphicsFamily 2.1
com.apple.driver.BroadcomUSBBluetoothHCIController 2.3.3f8
com.apple.driver.AppleUSBBluetoothHCIController 2.3.3f8
com.apple.iokit.IOBluetoothFamily 2.3.3f8
com.apple.iokit.IOUSBHIDDriver 4.0.2
com.apple.iokit.IOSCSIBlockCommandsDevice 2.6.5
com.apple.iokit.IOUSBMassStorageClass 2.6.1
com.apple.driver.AppleUSBMergeNub 4.0.0
com.apple.driver.AppleUSBComposite 3.9.0
com.apple.iokit.IOSCSIMultimediaCommandsDevice 2.6.5
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.IOAHCISerialATAPI 1.2.4
com.apple.iokit.IOSCSIArchitectureModelFamily 2.6.5
com.apple.iokit.IOFireWireFamily 4.2.6
com.apple.iokit.IOUSBUserClient 4.0.0
com.apple.iokit.IONetworkingFamily 1.9
com.apple.iokit.IOUSBFamily 4.0.2
com.apple.iokit.IOAHCIFamily 2.0.4
com.apple.driver.AppleEFIRuntime 1.3.0
com.apple.iokit.IOHIDFamily 1.6.4
com.apple.iokit.IOSMBusFamily 1.1
com.apple.kext.AppleMatch 1.0.0d1
com.apple.security.TMSafetyNet 6
com.apple.driver.DiskImages 283
com.apple.iokit.IOStorageFamily 1.6.1
com.apple.driver.AppleACPIPlatform 1.3.2
com.apple.iokit.IOPCIFamily 2.6
com.apple.iokit.IOACPIFamily 1.3.0


Thanks for your help with this. Have already downloaded the latest graphics update yesterday. It seemed to improve framerate - but did not stop crashing.
Hope that log means something to you - means nothing to me lol

Wow - what can I say?
Thanks so much for your help on this.
Will remove the x86 thing for temperature monitor tonight. Might as well take off rowmote for now as well just to be sure.
Need to keep the belkin one because its for the N52te Speedpad -a must for me for City of Heroes

Fingers crossed that this does the trick, but either way want to thank you for your help on this.