2010 Mac mini - repeated kernel panics

Question

Tearing my hair. Out. Have done all the recommended testing and still can&#x27;t track down the source of these kernel panics. RAM tests are fine. All of the Tech Tool Pro tests come out fine.There&#x27;s nothing specific I can do to invoke a kernel panic.  Sometimes it&#x27;ll go for a day without having one, but when it happens it will usually have a series of them all in a row.Latest crash log is below.  This one happened while running in Safe Mode.   Any help in interpreting what the crash log says would be greatly appreciated. Thanks.Interval Since Last Panic Report:  20039 secPanics Since Last Report:          1Anonymous UUID:                    C4DD7612-E725-CA31-C3F9-3ECC93C0E6E3Wed Sep  4 07:24:27 2013panic(cpu 0 caller 0xffffff800feb8655): Kernel trap at 0xffffff7f90706d5e, type 14&#x3D;page fault, registers:CR0: 0x000000008001003b, CR2: 0x0000000000000040, CR3: 0x0000000012a42000, CR4: 0x0000000000000660RAX: 0x0000000000000000, RBX: 0x0000000000000000, RCX: 0x0000000000000000, RDX: 0x0000000000000900RSP: 0xffffff80f7cd3a20, RBP: 0xffffff80f7cd3ac0, RSI: 0x0000000000000000, RDI: 0xffffff80dbbc6000R8:  0xffffff7f908b4825, R9:  0xffffff80f7cd3624, R10: 0xffffff80f7cd34a0, R11: 0x00000000ffffff80R12: 0x0000000000000000, R13: 0xffffff80f7cd3d68, R14: 0xffffff80dbbc6000, R15: 0x00000000ffffff00RFL: 0x0000000000010282, RIP: 0xffffff7f90706d5e, CS:  0x0000000000000008, SS:  0x0000000000000010Fault CR2: 0x0000000000000040, Error code: 0x0000000000000000, Fault CPU: 0x0Backtrace (CPU 0), Frame : Return Address0xffffff80f7cd36c0 : 0xffffff800fe1d626 0xffffff80f7cd3730 : 0xffffff800feb8655 0xffffff80f7cd3900 : 0xffffff800fece17d 0xffffff80f7cd3920 : 0xffffff7f90706d5e 0xffffff80f7cd3ac0 : 0xffffff7f906faceb 0xffffff80f7cd3c50 : 0xffffff7f904ee970 0xffffff80f7cd3cd0 : 0xffffff7f904da57b 0xffffff80f7cd3d40 : 0xffffff7f904dd1b8 0xffffff80f7cd3db0 : 0xffffff7f904dcdb4 0xffffff80f7cd3e10 : 0xffffff7f904a3c78 0xffffff80f7cd3e50 : 0xffffff7f904a2f63 0xffffff80f7cd3e80 : 0xffffff7f904a231e 0xffffff80f7cd3ef0 : 0xffffff8010248588 0xffffff80f7cd3f30 : 0xffffff801024708a 0xffffff80f7cd3f80 : 0xffffff80102471b9 0xffffff80f7cd3fb0 : 0xffffff800feb3137       Kernel Extensions in backtrace:         com.apple.iokit.IOGraphicsFamily(2.3.7)[990D1A42-DF16-3AB9-ABC1-6A88AC142244]@0 xffffff7f90495000-&gt;0xffffff7f904ccfff            dependency: com.apple.iokit.IOPCIFamily(2.7.3)[1D668879-BEF8-3C58-ABFE-FAC6B3E9A292]@0xffff ff7f90446000         com.apple.iokit.IONDRVSupport(2.3.7)[6C8CFC18-75F0-3DEF-86C7-CEB2C1FD6BB1]@0xff ffff7f904d8000-&gt;0xffffff7f904e9fff            dependency: com.apple.iokit.IOGraphicsFamily(2.3.7)[990D1A42-DF16-3AB9-ABC1-6A88AC142244]@0 xffffff7f90495000            dependency: com.apple.iokit.IOPCIFamily(2.7.3)[1D668879-BEF8-3C58-ABFE-FAC6B3E9A292]@0xffff ff7f90446000         com.apple.NVDAResman(8.1.2)[96AE69DE-8A37-39D0-B2D3-D8446A6AA670]@0xffffff7f904 ec000-&gt;0xffffff7f90791fff            dependency: com.apple.iokit.IOPCIFamily(2.7.3)[1D668879-BEF8-3C58-ABFE-FAC6B3E9A292]@0xffff ff7f90446000            dependency: com.apple.iokit.IONDRVSupport(2.3.7)[6C8CFC18-75F0-3DEF-86C7-CEB2C1FD6BB1]@0xff ffff7f904d8000            dependency: com.apple.iokit.IOGraphicsFamily(2.3.7)[990D1A42-DF16-3AB9-ABC1-6A88AC142244]@0 xffffff7f90495000BSD process name corresponding to current thread: kernel_taskMac OS version:12E55Kernel version:Darwin Kernel Version 12.4.0: Wed May  1 17:57:12 PDT 2013; root:xnu-2050.24.15~1/RELEASE_X86_64Kernel UUID: 896CB1E3-AB79-3DF1-B595-549DFFDF3D36Kernel slide:     0x000000000fc00000Kernel text base: 0xffffff800fe00000System model name: Macmini4,1 (Mac-F2208EC8)System uptime in nanoseconds: 1314153965626last loaded kext at 271666650121: com.apple.filesystems.msdosfs          1.8.1 (addr 0xffffff7f91fcc000, size 65536)last unloaded kext at 332969255186: com.apple.filesystems.msdosfs          1.8.1 (addr 0xffffff7f91fcc000, size 57344)loaded kexts:com.apple.driver.AppleHWSensor          1.9.5d0com.apple.driver.AppleBluetoothMultitouch          75.19com.apple.driver.AudioAUUC          1.60com.apple.driver.AGPM          100.12.87com.apple.driver.ApplePlatformEnabler          2.0.6d1com.apple.driver.AppleMikeyHIDDriver          122com.apple.driver.AppleHDA          2.3.7fc4com.apple.driver.AppleUpstreamUserClient          3.5.10com.apple.driver.AppleMCCSControl          1.1.11com.apple.driver.AppleMikeyDriver          2.3.7fc4com.apple.iokit.BroadcomBluetoothHCIControllerUSBTransport          4.1.4f2com.apple.driver.AppleLPC          1.6.0com.apple.iokit.IOUserEthernet          1.0.0d1com.apple.iokit.IOBluetoothSerialManager          4.1.4f2com.apple.Dont_Steal_Mac_OS_X          7.0.0com.apple.driver.ApplePolicyControl          3.4.5com.apple.driver.ACPI_SMC_PlatformPlugin          1.0.0com.apple.filesystems.autofs          3.0com.apple.GeForce          8.1.2com.apple.driver.AppleRAID          4.0.6com.apple.iokit.IOUSBAttachedSCSI          1.0.3com.apple.driver.AppleIRController          320.15com.apple.AppleFSCompression.AppleFSCompressionTypeDataless          1.0.0d1com.apple.AppleFSCompression.AppleFSCompressionTypeZlib          1.0.0d1com.apple.BootCache          34com.apple.iokit.SCSITaskUserClient          3.5.5com.apple.driver.XsanFilter          404com.apple.iokit.IOAHCIBlockStorage          2.3.1com.apple.driver.AppleSDXC          1.4.2com.apple.iokit.AppleBCM5701Ethernet          3.6.1b4com.apple.driver.AirPort.Brcm4331          615.20.17com.apple.driver.AppleFWOHCI          4.9.6com.apple.driver.AppleAHCIPort          2.5.2com.apple.driver.AppleUSBHub          5.5.5com.apple.driver.AppleEFINVRAM          1.7com.apple.driver.AppleUSBOHCI          5.2.5com.apple.driver.AppleUSBEHCI          5.5.0com.apple.driver.AppleHPET          1.8com.apple.driver.AppleRTC          1.5com.apple.driver.AppleACPIButtons          1.7com.apple.driver.AppleSMBIOS          1.9com.apple.driver.AppleACPIEC          1.7com.apple.driver.AppleAPIC          1.6com.apple.driver.AppleIntelCPUPowerManagementClient          196.0.0com.apple.nke.applicationfirewall          4.0.39com.apple.security.quarantine          2.1com.apple.driver.AppleIntelCPUPowerManagement          196.0.0com.apple.driver.IOBluetoothHIDDriver          4.1.4f2com.apple.driver.AppleMultitouchDriver          235.29com.apple.driver.DspFuncLib          2.3.7fc4com.apple.iokit.IOAudioFamily          1.8.9fc11com.apple.kext.OSvKernDSPLib          1.6com.apple.driver.AppleSMBusController          1.0.11d0com.apple.iokit.IOFireWireIP          2.2.5com.apple.iokit.AppleBluetoothHCIControllerUSBTransport          4.1.4f2com.apple.driver.AppleHDAController          2.3.7fc4com.apple.iokit.IOHDAFamily          2.3.7fc4com.apple.iokit.IOSurface          86.0.4com.apple.iokit.IOSerialFamily          10.0.6com.apple.iokit.IOBluetoothFamily          4.1.4f2com.apple.driver.AppleGraphicsControl          3.4.5com.apple.driver.AppleSMC          3.1.4d2com.apple.driver.IOPlatformPluginLegacy          1.0.0com.apple.driver.IOPlatformPluginFamily          5.3.0d51com.apple.driver.AppleSMBusPCI          1.0.11d0com.apple.kext.triggers          1.0com.apple.nvidia.nv50hal          8.1.2com.apple.NVDAResman          8.1.2com.apple.iokit.IONDRVSupport          2.3.7com.apple.iokit.IOGraphicsFamily          2.3.7com.apple.iokit.IOSCSIBlockCommandsDevice          3.5.5com.apple.iokit.IOUSBMassStorageClass          3.5.1com.apple.iokit.IOUSBHIDDriver          5.2.5com.apple.driver.AppleUSBMergeNub          5.5.5com.apple.driver.AppleUSBComposite          5.2.5com.apple.iokit.IOSCSIMultimediaCommandsDevice          3.5.5com.apple.iokit.IOBDStorageFamily          1.7com.apple.iokit.IODVDStorageFamily          1.7.1com.apple.iokit.IOCDStorageFamily          1.7.1com.apple.iokit.IOAHCISerialATAPI          2.5.1com.apple.iokit.IOSCSIArchitectureModelFamily          3.5.5com.apple.iokit.IOEthernetAVBController          1.0.2b1com.apple.iokit.IO80211Family          530.4com.apple.iokit.IONetworkingFamily          3.0com.apple.iokit.IOFireWireFamily          4.5.5com.apple.iokit.IOAHCIFamily          2.3.1com.apple.iokit.IOUSBUserClient          5.5.5com.apple.iokit.IOUSBFamily          5.6.0com.apple.driver.NVSMU          2.2.9com.apple.driver.AppleEFIRuntime          1.7com.apple.iokit.IOHIDFamily          1.8.1com.apple.iokit.IOSMBusFamily          1.1com.apple.security.sandbox          220.3com.apple.kext.AppleMatch          1.0.0d1com.apple.security.TMSafetyNet          7com.apple.driver.DiskImages          345com.apple.iokit.IOStorageFamily          1.8com.apple.driver.AppleKeyStore          28.21com.apple.driver.AppleACPIPlatform          1.7com.apple.iokit.IOPCIFamily          2.7.3com.apple.iokit.IOACPIFamily          1.4com.apple.kec.corecrypto          1.0Model: Macmini4,1, BootROM MM41.0042.B03, 2 processors, Intel Core 2 Duo, 2.4 GHz, 8 GB, SMC 1.65f2Graphics: NVIDIA GeForce 320M, NVIDIA GeForce 320M, PCI, 256 MBMemory Module: BANK 0/DIMM0, 4 GB, DDR3, 1067 MHz, 0x02BA, 0x000000000000000000000000000000000000Memory Module: BANK 1/DIMM0, 4 GB, DDR3, 1067 MHz, 0x02BA, 0x000000000000000000000000000000000000AirPort: spairport_wireless_card_type_airport_extreme (0x14E4, 0x93), Broadcom BCM43xx 1.0 (5.106.98.100.17)Bluetooth: Version 4.1.4f2 12041, 2 service, 18 devices, 1 incoming serial portsNetwork Service: Ethernet, Ethernet, en0Network Service: Wi-Fi, AirPort, en1Serial ATA Device: TOSHIBA MK3255GSXF, 320.07 GBSerial ATA Device: HL-DT-STDVDRW  GA32NUSB Device: USB2.0 Hub, 0x2109  (VIA Labs, Inc.), 0x0811, 0x24400000 / 2USB Device: AS2105, 0x174c  (ASMedia Technology Inc.), 0x5106, 0x24410000 / 4USB Device: AS2105, 0x174c  (ASMedia Technology Inc.), 0x5106, 0x24420000 / 3USB Device: Backup+ Desk, 0x0bc2  (Seagate LLC), 0xa0a4, 0x26400000 / 2USB Device: BRCM2070 Hub, 0x0a5c  (Broadcom Corp.), 0x4500, 0x06600000 / 3USB Device: Bluetooth USB Host Controller, apple_vendor_id, 0x8218, 0x06630000 / 6USB Device: IR Receiver, apple_vendor_id, 0x8242, 0x06500000 / 2

Linc Davis · Answer

Reinstall the original memory and see whether there&#x27;s any improvement. Be careful not to touch the gold contacts. Clean them with a mild solvent such as rubbing alcohol.The Apple Hardware Test or Apple Diagnostics, though generally unreliable, will sometimes detect a fault. A negative test can&#x27;t be depended on. Run the extended version of the test.

Joe Bailey · Answer

Intermittent errors like this are notoriously hard to track down and require lots of patience. Linc Davis&#x27; comments about Apple Hardware Test or Apple Diagnostics apply to TechTool Pro tests as well. Memory is notoriously hard to test with software and IMO any memory test that runs in less than several hours is probably a waste of time and CPU cycles. Given what I am seeing in your log, a standard diagnostic test is to physically detach any and all external devices except a wired keyboard, a wired mouse, and monitor. That includes hubs. If possible turn off Bluetooth  as well. Then run normally for several hours or even days and see if any KPs occur.

jaybushman · Answer

Thanks for the replies.First thing I did was replace the RAM - OWC chips that I bought with their lifetime warranty.  But repalcing the RAM didn&#x27;t change anything.  Didn&#x27;t try cleaning with rubbing alcohol though. How likely is that cause problems?Apple Hardware Test turned up no errors - I know not a huge a surprise.Joe: I have to dig up a wired keyboard/mouse to try out your recommendation. What precisely is it in the logs that leads you to that conclusion? I&#x27;ve been tryign to learn how to read these reports better, so any clarification would be appreciated.Thanks again.

Joe Bailey · Answer

About all I am seeing in the log are references to kernel extensions (kext) and I/O devices. Secondly I know from long experience that kernal panics are often caused by external devices, even USB hubs, and that these devices may work for long times before turning to the darkside. In short, I am playing a hunch, but one that is informed by encountering many similar problems over the years. The test proposed used to be a lot easier and far more commonly performed, when everyone had wired keyboards and mice but with Bluetooth, I/R, and third party R/F keyboards and other devices, it has become a bit of a pain. For this very reason I always keep at least one Apple wired keyboard and mouse around for diagnostic testing if nothing else.

Linc Davis · Answer

Didn&#x27;t try cleaning with rubbing alcohol though. How likely is that cause problems?Cleaning the contacts won&#x27;t cause problems. Touching them with your fingers will cause problems.