Help Diagnosing Kernel Panics (MBP 8,2 on ML)

Question

Hello all,I&#x27;m hoping you can help me resolve these kernel panics on my Early 2011 MacBook Pro. They occur regardless of whether or not there is any external hardware attached, so we probably can rule that out straight away. In fact, they primarily seem to occur when I use Safari. The last two kernel panics I encountered happened while I was inputting data into a text field. The system froze for about a second, then the screen went black, and then after rebooting itself I was treated to the "your computer restarted because of a problem" screen. The computer then started up normally and was perfectly functional until I tried using Safari again, some 35 minutes later. I got some usable time in the browser and then, once again, poof.I&#x27;ve been using Chrome since (my default browser) with zero kernel panics. I use three extensions with Safari: AdBlock, LastPass, and Coda Notes.I&#x27;ve captured the last two crash reports (from the kernel panics described above) and they&#x27;re included below.Panic Report 1:Interval Since Last Panic Report:  370592 secPanics Since Last Report:          1Anonymous UUID:                    XXXXXXXX-XXXX-XXXX-XXXX-XXXXXXXXXXXXFri Jan 25 09:12:58 2013panic(cpu 4 caller 0xffffff7f8d5793e2): "AGC GPU REGISTER RESTORE FAILED : rdar://7254528"@/SourceCache/AppleGraphicsControl/AppleGraphicsControl-3.2.11/s rc/AppleMuxControl/../logSupport/../AppleMuxControl/kext/AGCPowerManagement.cpp: 1044Backtrace (CPU 4), Frame : Return Address0xffffff80fc4b3e50 : 0xffffff800b81d6260xffffff80fc4b3ec0 : 0xffffff7f8d5793e20xffffff80fc4b3f00 : 0xffffff7f8d57b9eb0xffffff80fc4b3f20 : 0xffffff800bc49e4a0xffffff80fc4b3f60 : 0xffffff800b83dcde0xffffff80fc4b3fb0 : 0xffffff800b8b26b7      Kernel Extensions in backtrace:         com.apple.driver.AppleMuxControl(3.2.11)[9D215B87-F07B-3D3A-984E-5D5493D79624]@ 0xffffff7f8d56e000-&gt;0xffffff7f8d57ffff            dependency: com.apple.driver.AppleBacklightExpert(1.0.4)[F93C2586-66DE-3C52-84CC-50BD609C7F 6A]@0xffffff7f8d569000            dependency: com.apple.iokit.IOPCIFamily(2.7.2)[B1B77B26-7984-302F-BA8E-544DD3D75E73]@0xffff ff7f8be72000            dependency: com.apple.driver.AppleGraphicsControl(3.2.11)[2D5E5800-BA2D-3BBE-B4A5-4D02C4761 D6B]@0xffffff7f8d555000            dependency: com.apple.iokit.IOACPIFamily(1.4)[A35915E8-C1B0-3C0F-81DF-5515BC9002FC]@0xfffff f7f8bdf2000            dependency: com.apple.iokit.IONDRVSupport(2.3.5)[86DDB71C-A73A-3EBE-AC44-0BC9A38B9A44]@0xff ffff7f8c421000            dependency: com.apple.iokit.IOGraphicsFamily(2.3.5)[803496D0-ADAD-3ADB-B071-8A0A197DA53D]@0 xffffff7f8c3de000BSD process name corresponding to current thread: kernel_taskMac OS version:12C60Kernel version:Darwin Kernel Version 12.2.0: Sat Aug 25 00:48:52 PDT 2012; root:xnu-2050.18.24~1/RELEASE_X86_64Kernel UUID: 69A5853F-375A-3EF4-9247-478FD0247333Kernel slide:     0x000000000b600000Kernel text base: 0xffffff800b800000System model name: MacBookPro8,2 (Mac-94245A3940C91C80)System uptime in nanoseconds: 3176079022166last loaded kext at 593995373657: com.apple.driver.AppleUSBCDC          4.1.22 (addr 0xffffff7f8dba6000, size 16384)last unloaded kext at 661321326450: com.apple.driver.AppleUSBCDC          4.1.22 (addr 0xffffff7f8dba6000, size 12288)loaded kexts:com.apple.driver.AppleHWSensor          1.9.5d0com.apple.iokit.IOBluetoothSerialManager          4.0.9f33com.apple.driver.AudioAUUC          1.60com.apple.filesystems.ntfs          3.10com.apple.filesystems.autofs          3.0com.apple.driver.AGPM          100.12.69com.apple.driver.AppleMikeyHIDDriver          122com.apple.driver.AppleUpstreamUserClient          3.5.10com.apple.kext.AMDFramebuffer          8.0.0com.apple.driver.AppleHDA          2.3.1f2com.apple.iokit.IOUserEthernet          1.0.0d1com.apple.AMDRadeonAccelerator          1.0.0com.apple.driver.AppleIntelHD3000Graphics          8.0.0com.apple.driver.SMCMotionSensor          3.0.2d6com.apple.driver.AppleLPC          1.6.0com.apple.iokit.BroadcomBluetoothHCIControllerUSBTransport          4.0.9f33com.apple.driver.AppleSMCLMU          2.0.2d0com.apple.driver.AppleMikeyDriver          2.3.1f2com.apple.driver.AppleSMCPDRC          1.0.0com.apple.driver.AppleMuxControl          3.2.11com.apple.driver.AppleIntelSNBGraphicsFB          8.0.0com.apple.Dont_Steal_Mac_OS_X          7.0.0com.apple.driver.ApplePolicyControl          3.2.11com.apple.driver.ACPI_SMC_PlatformPlugin          1.0.0com.apple.driver.AppleMCCSControl          1.0.33com.apple.driver.AppleUSBTCButtons          235.4com.apple.driver.AppleUSBTCKeyboard          235.4com.apple.driver.AppleIRController          320.15com.apple.iokit.SCSITaskUserClient          3.5.1com.apple.AppleFSCompression.AppleFSCompressionTypeDataless          1.0.0d1com.apple.AppleFSCompression.AppleFSCompressionTypeZlib          1.0.0d1com.apple.BootCache          34com.apple.driver.XsanFilter          404com.apple.iokit.IOAHCIBlockStorage          2.2.2com.apple.driver.AppleUSBHub          5.2.5com.apple.driver.AppleSDXC          1.2.2com.apple.iokit.AppleBCM5701Ethernet          3.2.5b3com.apple.driver.AirPort.Brcm4331          602.15.22com.apple.driver.AppleFWOHCI          4.9.6com.apple.driver.AppleAHCIPort          2.4.1com.apple.driver.AppleUSBEHCI          5.4.0com.apple.driver.AppleEFINVRAM          1.6.1com.apple.driver.AppleIntelCPUPowerManagementClient          196.0.0com.apple.driver.AppleSmartBatteryManager          161.0.0com.apple.driver.AppleACPIButtons          1.6com.apple.driver.AppleRTC          1.5com.apple.driver.AppleHPET          1.7com.apple.driver.AppleSMBIOS          1.9com.apple.driver.AppleACPIEC          1.6com.apple.driver.AppleAPIC          1.6com.apple.nke.applicationfirewall          4.0.39com.apple.security.quarantine          2com.apple.driver.AppleIntelCPUPowerManagement          196.0.0com.apple.iokit.IOSerialFamily          10.0.6com.apple.kext.triggers          1.0com.apple.driver.DspFuncLib          2.3.1f2com.apple.iokit.IOAudioFamily          1.8.9fc10com.apple.kext.OSvKernDSPLib          1.6com.apple.iokit.IOSurface          86.0.3com.apple.iokit.IOAcceleratorFamily          19.0.26com.apple.iokit.AppleBluetoothHCIControllerUSBTransport          4.0.9f33com.apple.iokit.IOBluetoothFamily          4.0.9f33com.apple.iokit.IOFireWireIP          2.2.5com.apple.driver.AppleSMBusPCI          1.0.10d0com.apple.driver.AppleGraphicsControl          3.2.11com.apple.kext.AMD6000Controller          8.0.0com.apple.kext.AMDSupport          8.0.0com.apple.driver.AppleSMC          3.1.4d2com.apple.driver.IOPlatformPluginLegacy          1.0.0com.apple.driver.IOPlatformPluginFamily          5.2.0d16com.apple.driver.AppleBacklightExpert          1.0.4com.apple.iokit.IONDRVSupport          2.3.5com.apple.driver.AppleSMBusController          1.0.10d0com.apple.driver.AppleHDAController          2.3.1f2com.apple.iokit.IOGraphicsFamily          2.3.5com.apple.iokit.IOHDAFamily          2.3.1f2com.apple.driver.AppleThunderboltDPInAdapter          1.8.5com.apple.driver.AppleThunderboltDPAdapterFamily          1.8.5com.apple.driver.AppleThunderboltPCIDownAdapter          1.2.5com.apple.driver.AppleUSBMultitouch          235.7com.apple.iokit.IOUSBHIDDriver          5.2.5com.apple.driver.AppleUSBMergeNub          5.2.5com.apple.driver.AppleUSBComposite          5.2.5com.apple.iokit.IOSCSIMultimediaCommandsDevice          3.5.1com.apple.iokit.IOBDStorageFamily          1.7com.apple.iokit.IODVDStorageFamily          1.7.1com.apple.iokit.IOCDStorageFamily          1.7.1com.apple.driver.CoreStorage          274.7com.apple.iokit.IOAHCISerialATAPI          2.5.0com.apple.iokit.IOSCSIArchitectureModelFamily          3.5.1com.apple.driver.AppleThunderboltNHI          1.6.0com.apple.iokit.IOThunderboltFamily          2.1.1com.apple.iokit.IOUSBUserClient          5.2.5com.apple.iokit.IOEthernetAVBController          1.0.2b1com.apple.iokit.IO80211Family          500.15com.apple.iokit.IONetworkingFamily          3.0com.apple.iokit.IOFireWireFamily          4.5.5com.apple.iokit.IOAHCIFamily          2.2.1com.apple.iokit.IOUSBFamily          5.4.0com.apple.driver.AppleEFIRuntime          1.6.1com.apple.iokit.IOHIDFamily          1.8.0com.apple.iokit.IOSMBusFamily          1.1com.apple.security.sandbox          220com.apple.kext.AppleMatch          1.0.0d1com.apple.security.TMSafetyNet          7com.apple.driver.DiskImages          344com.apple.iokit.IOStorageFamily          1.8com.apple.driver.AppleKeyStore          28.21com.apple.driver.AppleACPIPlatform          1.6com.apple.iokit.IOPCIFamily          2.7.2com.apple.iokit.IOACPIFamily          1.4com.apple.kec.corecrypto          1.0Model: MacBookPro8,2, BootROM MBP81.0047.B27, 4 processors, Intel Core i7, 2 GHz, 8 GB, SMC 1.69f3Graphics: Intel HD Graphics 3000, Intel HD Graphics 3000, Built-In, 512 MBGraphics: AMD Radeon HD 6490M, AMD Radeon HD 6490M, PCIe, 256 MBMemory Module: BANK 0/DIMM0, 4 GB, DDR3, 1333 MHz, 0x0198, 0x393930353432382D3034332E4130304C4620Memory Module: BANK 1/DIMM0, 4 GB, DDR3, 1333 MHz, 0x0198, 0x393930353432382D3034332E4130304C4620AirPort: spairport_wireless_card_type_airport_extreme (0x14E4, 0xD6), Broadcom BCM43xx 1.0 (5.106.98.81.22)Bluetooth: Version 4.0.9f33 10885, 2 service, 18 devices, 1 incoming serial portsNetwork Service: Wi-Fi, AirPort, en1Serial ATA Device: WDC WD5000BEKT-60KA9T0, 500.11 GBSerial ATA Device: MATSHITADVD-R   UJ-8A8USB Device: hub_device, 0x0424  (SMSC), 0x2513, 0xfa100000 / 3USB Device: BRCM2070 Hub, 0x0a5c  (Broadcom Corp.), 0x4500, 0xfa110000 / 5USB Device: Bluetooth USB Host Controller, apple_vendor_id, 0x821a, 0xfa113000 / 7USB Device: Apple Internal Keyboard / Trackpad, apple_vendor_id, 0x0245, 0xfa120000 / 4USB Device: FaceTime HD Camera (Built-in), apple_vendor_id, 0x8509, 0xfa200000 / 2USB Device: hub_device, 0x0424  (SMSC), 0x2513, 0xfd100000 / 2USB Device: IR Receiver, apple_vendor_id, 0x8242, 0xfd110000 / 3Panic Report 2:Interval Since Last Panic Report:  370561 secPanics Since Last Report:          2Anonymous UUID:                    XXXXXXXX-XXXX-XXXX-XXXX-XXXXXXXXXXXXFri Jan 25 09:47:12 2013panic(cpu 6 caller 0xffffff7fa5d793e2): "AGC GPU REGISTER RESTORE FAILED : rdar://7254528"@/SourceCache/AppleGraphicsControl/AppleGraphicsControl-3.2.11/s rc/AppleMuxControl/../logSupport/../AppleMuxControl/kext/AGCPowerManagement.cpp: 1044Backtrace (CPU 6), Frame : Return Address0xffffff811591be50 : 0xffffff802401d6260xffffff811591bec0 : 0xffffff7fa5d793e20xffffff811591bf00 : 0xffffff7fa5d7b9eb0xffffff811591bf20 : 0xffffff8024449e4a0xffffff811591bf60 : 0xffffff802403dcde0xffffff811591bfb0 : 0xffffff80240b26b7      Kernel Extensions in backtrace:         com.apple.driver.AppleMuxControl(3.2.11)[9D215B87-F07B-3D3A-984E-5D5493D79624]@ 0xffffff7fa5d6e000-&gt;0xffffff7fa5d7ffff            dependency: com.apple.driver.AppleBacklightExpert(1.0.4)[F93C2586-66DE-3C52-84CC-50BD609C7F 6A]@0xffffff7fa5d69000            dependency: com.apple.iokit.IOPCIFamily(2.7.2)[B1B77B26-7984-302F-BA8E-544DD3D75E73]@0xffff ff7fa4672000            dependency: com.apple.driver.AppleGraphicsControl(3.2.11)[2D5E5800-BA2D-3BBE-B4A5-4D02C4761 D6B]@0xffffff7fa5d55000            dependency: com.apple.iokit.IOACPIFamily(1.4)[A35915E8-C1B0-3C0F-81DF-5515BC9002FC]@0xfffff f7fa45f2000            dependency: com.apple.iokit.IONDRVSupport(2.3.5)[86DDB71C-A73A-3EBE-AC44-0BC9A38B9A44]@0xff ffff7fa4c21000            dependency: com.apple.iokit.IOGraphicsFamily(2.3.5)[803496D0-ADAD-3ADB-B071-8A0A197DA53D]@0 xffffff7fa4bde000BSD process name corresponding to current thread: kernel_taskMac OS version:12C60Kernel version:Darwin Kernel Version 12.2.0: Sat Aug 25 00:48:52 PDT 2012; root:xnu-2050.18.24~1/RELEASE_X86_64Kernel UUID: 69A5853F-375A-3EF4-9247-478FD0247333Kernel slide:     0x0000000023e00000Kernel text base: 0xffffff8024000000System model name: MacBookPro8,2 (Mac-94245A3940C91C80)System uptime in nanoseconds: 2030828730343last loaded kext at 42207871972: com.apple.driver.AppleHWSensor          1.9.5d0 (addr 0xffffff7fa5b3c000, size 36864)last unloaded kext at 219081227307: com.apple.driver.AppleUSBUHCI          5.2.5 (addr 0xffffff7fa499b000, size 65536)loaded kexts:com.apple.driver.AppleHWSensor          1.9.5d0com.apple.iokit.IOBluetoothSerialManager          4.0.9f33com.apple.filesystems.autofs          3.0com.apple.filesystems.ntfs          3.10com.apple.driver.AudioAUUC          1.60com.apple.driver.AGPM          100.12.69com.apple.driver.AppleMikeyHIDDriver          122com.apple.iokit.IOUserEthernet          1.0.0d1com.apple.driver.AppleHDA          2.3.1f2com.apple.driver.AppleUpstreamUserClient          3.5.10com.apple.driver.AppleIntelHD3000Graphics          8.0.0com.apple.driver.ACPI_SMC_PlatformPlugin          1.0.0com.apple.driver.AppleMikeyDriver          2.3.1f2com.apple.iokit.BroadcomBluetoothHCIControllerUSBTransport          4.0.9f33com.apple.driver.AppleSMCPDRC          1.0.0com.apple.Dont_Steal_Mac_OS_X          7.0.0com.apple.driver.ApplePolicyControl          3.2.11com.apple.driver.AppleIntelSNBGraphicsFB          8.0.0com.apple.kext.AMDFramebuffer          8.0.0com.apple.AMDRadeonAccelerator          1.0.0com.apple.driver.AppleSMCLMU          2.0.2d0com.apple.driver.AppleLPC          1.6.0com.apple.driver.AppleMuxControl          3.2.11com.apple.driver.AppleMCCSControl          1.0.33com.apple.driver.SMCMotionSensor          3.0.2d6com.apple.driver.AppleUSBTCButtons          235.4com.apple.driver.AppleUSBTCKeyboard          235.4com.apple.driver.AppleIRController          320.15com.apple.AppleFSCompression.AppleFSCompressionTypeDataless          1.0.0d1com.apple.AppleFSCompression.AppleFSCompressionTypeZlib          1.0.0d1com.apple.BootCache          34com.apple.iokit.SCSITaskUserClient          3.5.1com.apple.driver.XsanFilter          404com.apple.iokit.IOAHCIBlockStorage          2.2.2com.apple.driver.AppleUSBHub          5.2.5com.apple.driver.AppleSDXC          1.2.2com.apple.driver.AirPort.Brcm4331          602.15.22com.apple.iokit.AppleBCM5701Ethernet          3.2.5b3com.apple.driver.AppleFWOHCI          4.9.6com.apple.driver.AppleAHCIPort          2.4.1com.apple.driver.AppleUSBEHCI          5.4.0com.apple.driver.AppleSmartBatteryManager          161.0.0com.apple.driver.AppleEFINVRAM          1.6.1com.apple.driver.AppleIntelCPUPowerManagementClient          196.0.0com.apple.driver.AppleHPET          1.7com.apple.driver.AppleACPIButtons          1.6com.apple.driver.AppleRTC          1.5com.apple.driver.AppleSMBIOS          1.9com.apple.driver.AppleACPIEC          1.6com.apple.driver.AppleAPIC          1.6com.apple.nke.applicationfirewall          4.0.39com.apple.security.quarantine          2com.apple.driver.AppleIntelCPUPowerManagement          196.0.0com.apple.iokit.IOSerialFamily          10.0.6com.apple.kext.triggers          1.0com.apple.driver.DspFuncLib          2.3.1f2com.apple.iokit.IOAudioFamily          1.8.9fc10com.apple.kext.OSvKernDSPLib          1.6com.apple.iokit.IOSurface          86.0.3com.apple.driver.IOPlatformPluginLegacy          1.0.0com.apple.iokit.IOBluetoothFamily          4.0.9f33com.apple.iokit.AppleBluetoothHCIControllerUSBTransport          4.0.9f33com.apple.iokit.IOFireWireIP          2.2.5com.apple.driver.AppleHDAController          2.3.1f2com.apple.iokit.IOHDAFamily          2.3.1f2com.apple.iokit.IOAcceleratorFamily          19.0.26com.apple.kext.AMD6000Controller          8.0.0com.apple.kext.AMDSupport          8.0.0com.apple.driver.AppleSMBusPCI          1.0.10d0com.apple.driver.IOPlatformPluginFamily          5.2.0d16com.apple.driver.AppleGraphicsControl          3.2.11com.apple.driver.AppleBacklightExpert          1.0.4com.apple.iokit.IONDRVSupport          2.3.5com.apple.driver.AppleSMBusController          1.0.10d0com.apple.iokit.IOGraphicsFamily          2.3.5com.apple.driver.AppleSMC          3.1.4d2com.apple.driver.AppleThunderboltDPInAdapter          1.8.5com.apple.driver.AppleThunderboltDPAdapterFamily          1.8.5com.apple.driver.AppleThunderboltPCIDownAdapter          1.2.5com.apple.driver.AppleUSBMultitouch          235.7com.apple.iokit.IOUSBHIDDriver          5.2.5com.apple.driver.AppleUSBMergeNub          5.2.5com.apple.driver.AppleUSBComposite          5.2.5com.apple.driver.CoreStorage          274.7com.apple.iokit.IOSCSIMultimediaCommandsDevice          3.5.1com.apple.iokit.IOBDStorageFamily          1.7com.apple.iokit.IODVDStorageFamily          1.7.1com.apple.iokit.IOCDStorageFamily          1.7.1com.apple.iokit.IOAHCISerialATAPI          2.5.0com.apple.iokit.IOSCSIArchitectureModelFamily          3.5.1com.apple.driver.AppleThunderboltNHI          1.6.0com.apple.iokit.IOThunderboltFamily          2.1.1com.apple.iokit.IOUSBUserClient          5.2.5com.apple.iokit.IO80211Family          500.15com.apple.iokit.IOEthernetAVBController          1.0.2b1com.apple.iokit.IONetworkingFamily          3.0com.apple.iokit.IOFireWireFamily          4.5.5com.apple.iokit.IOAHCIFamily          2.2.1com.apple.iokit.IOUSBFamily          5.4.0com.apple.driver.AppleEFIRuntime          1.6.1com.apple.iokit.IOHIDFamily          1.8.0com.apple.iokit.IOSMBusFamily          1.1com.apple.security.sandbox          220com.apple.kext.AppleMatch          1.0.0d1com.apple.security.TMSafetyNet          7com.apple.driver.DiskImages          344com.apple.iokit.IOStorageFamily          1.8com.apple.driver.AppleKeyStore          28.21com.apple.driver.AppleACPIPlatform          1.6com.apple.iokit.IOPCIFamily          2.7.2com.apple.iokit.IOACPIFamily          1.4com.apple.kec.corecrypto          1.0Model: MacBookPro8,2, BootROM MBP81.0047.B27, 4 processors, Intel Core i7, 2 GHz, 8 GB, SMC 1.69f3Graphics: Intel HD Graphics 3000, Intel HD Graphics 3000, Built-In, 512 MBGraphics: AMD Radeon HD 6490M, AMD Radeon HD 6490M, PCIe, 256 MBMemory Module: BANK 0/DIMM0, 4 GB, DDR3, 1333 MHz, 0x0198, 0x393930353432382D3034332E4130304C4620Memory Module: BANK 1/DIMM0, 4 GB, DDR3, 1333 MHz, 0x0198, 0x393930353432382D3034332E4130304C4620AirPort: spairport_wireless_card_type_airport_extreme (0x14E4, 0xD6), Broadcom BCM43xx 1.0 (5.106.98.81.22)Bluetooth: Version 4.0.9f33 10885, 2 service, 18 devices, 1 incoming serial portsNetwork Service: Wi-Fi, AirPort, en1Serial ATA Device: WDC WD5000BEKT-60KA9T0, 500.11 GBSerial ATA Device: MATSHITADVD-R   UJ-8A8USB Device: FaceTime HD Camera (Built-in), apple_vendor_id, 0x8509, 0xfa200000 / 3USB Device: hub_device, 0x0424  (SMSC), 0x2513, 0xfa100000 / 2USB Device: Apple Internal Keyboard / Trackpad, apple_vendor_id, 0x0245, 0xfa120000 / 5USB Device: BRCM2070 Hub, 0x0a5c  (Broadcom Corp.), 0x4500, 0xfa110000 / 4USB Device: Bluetooth USB Host Controller, apple_vendor_id, 0x821a, 0xfa113000 / 7USB Device: hub_device, 0x0424  (SMSC), 0x2513, 0xfd100000 / 2USB Device: IR Receiver, apple_vendor_id, 0x8242, 0xfd110000 / 3I&#x27;ve run a check with Rember on my RAM (although I only had time for a single run) and all tests passed successfully.Thoughts?

Linc Davis · Accepted Answer

That panic was not caused by third-party software. If the problem is recurrent, the possibilities are:A damaged OS X installationA fault in a peripheral device, if anyCorrupt non-volatile memory (NVRAM)An internal hardware faultAn obscure bug in OS XYou can rule out the first two possibilities by reinstalling the OS and testing with non-essential peripherals disconnected and aftermarket expansion cards removed, if applicable. Sometimes a clean reinstallation (after erasing the startup volume) may solve a problem that isn&#x27;t solved by reinstalling in place, without erasing.Corrupt NVRAM, which rarely causes panics, can be ruled out by resetting it as directed in this support article.If you&#x27;ve recently upgraded the memory, reinstall the original memory and see whether there&#x27;s any improvement. Be careful not to touch the gold contacts on the memory modules when handling them. If necessary, clean them with a mild solvent such as rubbing alcohol.The Apple Hardware Test, though generally unreliable, will sometimes detect a fault. A negative test can&#x27;t be depended on. Run the extended version of the test.In the category of obscure bugs, reports suggest that FileVault may trigger kernel traps under some unknown conditions. Most, though not all, of these reports seem to involve booting from an aftermarket SSD. If those conditions apply to you, try deactivating FileVault.Otherwise, make a "Genius" appointment at an Apple Store to have the machine tested. You may have to leave it there for several days. There isn&#x27;t much point in doing this unless you can reproduce the panic, or if you can&#x27;t, it happens often enough that it&#x27;s likely to be repeated at the store. Otherwise you may be told that nothing is wrong.Print the first page of the panic report and bring it with you.Back up all data on the internal drive(s) before you hand over your computer to anyone. If privacy is a concern, erase the data partition(s) with the option to write zeros* (do this only if you know how to restore, and you have at least  two independent backups.) Don’t erase the recovery partition, if present.Keeping your confidential data secure during hardware repair*An SSD doesn&#x27;t need to be zeroed.

The Mangelo · Answer

Thanks for the thorough reply, Linc. I tried removing the Safari extensions after I posted and was able to use the browser for a few hours but eventually the system kerploded again.I&#x27;ll try doing a full wipe/reinstall in a couple of weeks when I have some down time. That really doesn&#x27;t sounds like much fun, but if it&#x27;ll resolve the issue, it&#x27;s certainly better than having to be without a computer for a few days, which I can&#x27;t consider doing for at least a few months.If there&#x27;s an upcoming update to Mountain Lion, maybe that might resolve the issue. I&#x27;ll update when I have news.

The Mangelo · Answer

Some further observations on this issue, for my own records. Kernel panics have occurred and reports have been sent as follows:25 January, 2013 (twice)30 January, 20139 February, 201314 February, 2013 (twice)17 February, 201324 February, 201326 February, 201327 February, 2013In all cases, the MacBook Pro crashed while it was being used without any peripheral hardware. The MBP is used at home with a wired Apple keyboard, Magic Mouse, and 24" Dell U2410 monitor and has never crashed in that configuration.Crashes seem to occur when using:SafariChromeOther apps that are almost always running during these crashes include:OmniFocusSparrowBBEditMessagesI&#x27;m going to wipe and reinstall on Saturday and report back with my findings.

The Mangelo · Answer

I haven&#x27;t yet done the wipe/reinstall but I have more interesting findings to report.Using gfxCardStatus I see that when the machine is using the discrete video card when connected to an external monitor. I have never had a kernel panic while the machine is using an external monitor.When I&#x27;m using it out and about the machine defaults to the integrated video card to preserve battery life, as expected. I can force repeatable kernel panics by trying to launch PhotoBooth, with no other software running. The application won&#x27;t launch, the machine freezes for a second and then restarts.If I use gfxCardStatus to force the use of the discrete video card, and then try launching PhotoBooth, there is zero problem.I suspect the crash happens when the machine tries to hand over control from one video card to another as evidenced by the "AGC GPU REGISTER RESTORE FAILED" warning in every Problem Report I&#x27;ve submitted. Now I have to determine if the issue is a corrupt file or a failing logic board.

mudditt · Answer

The MangeloI had the same thing occur, but by installing gfxcardstatus and using that to select the card being used my problem seems to have gone awayI switch to discrete and leave it there, I can now shutdown normally and so long as I select one or other of the video cards its seems stable.Mine would fail doing anything where the video switcher got involved even going into settings and turning auto off would crash the machine