Mac Pro Kernel Panic

Question

So I got this new Mac Pro and was testing it out (fairly casual use, mind; just web browsing) when it kernel panic&#x27;d on me.Here&#x27;s the error report it generated on reboot:Interval Since Last Panic Report:  3168 secPanics Since Last Report:          1Anonymous UUID:                    3C96EB87-2264-41C3-A182-C4048B2AEDAAThu May  2 15:58:15 2013Machine-check capabilities (cpu 10) 0x0000000000001c09:family: 6 model: 44 stepping: 2 microcode: 15Intel(R) Xeon(R) CPU           E5620  @ 2.40GHz9 error-reporting banksthreshold-based error status presentextended corrected memory error handling presentMachine-check status 0x0000000000000004:machine-check in progressMCA error-reporting registers:IA32_MC0_STATUS(0x401): 0x0000000000000800 invalidIA32_MC1_STATUS(0x405): 0x0000000000000800 invalidIA32_MC2_STATUS(0x409): 0x0000000000000000 invalidIA32_MC3_STATUS(0x40d): 0x0000000000000000 invalidIA32_MC4_STATUS(0x411): 0x0000000000000000 invalidIA32_MC5_STATUS(0x415): 0x0000000000000000 invalidIA32_MC6_STATUS(0x419): 0x0000000000000000 invalidIA32_MC7_STATUS(0x41d): 0x0000000000000000 invalidPackage 1 logged:IA32_MC8_STATUS(0x421): 0x0000000000000000 invalidPackage 0 logged:IA32_MC8_STATUS(0x421): 0x0000000000000000 invalidpanic(cpu 10 caller 0xffffff80002c4dd5): "Machine Check at 0xffffff7f81ca5a3a, registers:
" "CR0: 0x000000008001003b, CR2: 0x000000011785a000, CR3: 0x000000000f0b1024, CR4: 0x00000000000206e0
" "RAX: 0x0000000000000001, RBX: 0x0000000000000000, RCX: 0x0000000000000001, RDX: 0x0000000000000000
" "RSP: 0xffffff807f2b3ad0, RBP: 0xffffff807f2b3b00, RSI: 0x0000000000000006, RDI: 0xffffff800b317400
" "R8:  0xffffff800b205800, R9:  0xffffff800cd61280, R10: 0x0000000000000003, R11: 0xffffff80002dad60
" "R12: 0x0000000000000148, R13: 0xffffff800b0ef3c0, R14: 0xffffff800b205800, R15: 0x0000000000000001
" "RFL: 0x0000000000000046, RIP: 0xffffff7f81ca5a3a, CS:  0x0000000000000008, SS:  0x0000000000000010
" "Error code: 0x0000000000000000
"@/SourceCache/xnu/xnu-1699.32.7/osfmk/i386/trap_native.c:2 78Backtrace (CPU 10), Frame : Return Address0xffffff80799f7ec0 : 0xffffff8000220792 0xffffff80799f7f40 : 0xffffff80002c4dd5 0xffffff80799f80a0 : 0xffffff80002daf2f 0xffffff807f2b3b00 : 0xffffff7f81c9cf65 0xffffff807f2b3bd0 : 0xffffff7f81c9ea5c 0xffffff807f2b3c80 : 0xffffff80002c6422 0xffffff807f2b3ca0 : 0xffffff800022d375 0xffffff807f2b3ce0 : 0xffffff800022e060 0xffffff807f2b3d40 : 0xffffff800022f413 0xffffff807f2b3da0 : 0xffffff800053b400 0xffffff807f2b3e10 : 0xffffff800053cac8 0xffffff807f2b3f20 : 0xffffff800053cbe6 0xffffff807f2b3f50 : 0xffffff80005ce4cb 0xffffff807f2b3fb0 : 0xffffff80002daea3       Kernel Extensions in backtrace:         com.apple.driver.AppleIntelCPUPowerManagement(195.0)[70D39B65-894A-335D-A051-0C 8B8CAFEA82]@0xffffff7f81c9b000-&gt;0xffffff7f81cc3fffBSD process name corresponding to current thread: WebProcessMac OS version:11G63bKernel version:Darwin Kernel Version 11.4.2: Thu Aug 23 16:25:48 PDT 2012; root:xnu-1699.32.7~1/RELEASE_X86_64Kernel UUID: FF3BB088-60A4-349C-92EA-CA649C698CE5System model name: MacPro5,1 (Mac-F221BEC8)System uptime in nanoseconds: 1188529128924last loaded kext at 20338035449: com.apple.driver.AppleHWSensor          1.9.5d0 (addr 0xffffff7f81cc5000, size 28672)last unloaded kext at 213383165555: com.apple.driver.AppleIntel8254XEthernet          2.1.3b1 (addr 0xffffff7f80c48000, size 110592)loaded kexts:com.apple.driver.AppleHWSensor          1.9.5d0com.apple.filesystems.autofs          3.0com.apple.driver.AppleMikeyHIDDriver          122com.apple.driver.AudioAUUC          1.59com.apple.driver.AppleUpstreamUserClient          3.5.9com.apple.driver.AppleMCCSControl          1.0.33com.apple.kext.ATIFramebuffer          7.3.2com.apple.driver.AppleHDA          2.2.5a5com.apple.driver.AppleMikeyDriver          2.2.5a5com.apple.ATIRadeonX3000          7.3.2com.apple.driver.AppleTyMCEDriver          1.0.2d2com.apple.driver.AGPM          100.12.75com.apple.iokit.IOUserEthernet          1.0.0d1com.apple.iokit.IOBluetoothSerialManager          4.0.8f17com.apple.Dont_Steal_Mac_OS_X          7.0.0com.apple.driver.AudioIPCDriver          1.2.3com.apple.driver.ApplePolicyControl          3.1.33com.apple.driver.ACPI_SMC_PlatformPlugin          5.0.0d8com.apple.driver.AppleLPC          1.6.0com.apple.driver.BroadcomUSBBluetoothHCIController          4.0.8f17com.apple.driver.XsanFilter          404com.apple.iokit.IOAHCIBlockStorage          2.1.0com.apple.iokit.SCSITaskUserClient          3.2.1com.apple.AppleFSCompression.AppleFSCompressionTypeDataless          1.0.0d1com.apple.AppleFSCompression.AppleFSCompressionTypeZlib          1.0.0d1com.apple.BootCache          33com.apple.driver.AppleFWOHCI          4.9.0com.apple.iokit.IOAHCISerialATAPI          2.0.3com.apple.driver.AirPort.Brcm4331          561.7.22com.apple.driver.AppleUSBHub          5.1.0com.apple.driver.Intel82574L          2.2.0b3com.apple.driver.AppleAHCIPort          2.3.1com.apple.driver.AppleUSBEHCI          5.1.0com.apple.driver.AppleUSBUHCI          5.1.0com.apple.driver.AppleEFINVRAM          1.6.1com.apple.driver.AppleRTC          1.5com.apple.driver.AppleHPET          1.7com.apple.driver.AppleACPIButtons          1.5com.apple.driver.AppleSMBIOS          1.9com.apple.driver.AppleACPIEC          1.5com.apple.driver.AppleAPIC          1.6com.apple.driver.AppleIntelCPUPowerManagementClient          195.0.0com.apple.nke.applicationfirewall          3.2.30com.apple.security.quarantine          1.4com.apple.security.TMSafetyNet          8com.apple.driver.AppleIntelCPUPowerManagement          195.0.0com.apple.kext.triggers          1.0com.apple.driver.DspFuncLib          2.2.5a5com.apple.driver.AppleSMBusController          1.0.10d0com.apple.kext.ATI5000Controller          7.3.2com.apple.kext.ATISupport          7.3.2com.apple.iokit.IOSurface          80.0.2com.apple.iokit.IOSerialFamily          10.0.5com.apple.iokit.IOFireWireIP          2.2.5com.apple.iokit.IOAudioFamily          1.8.6fc18com.apple.kext.OSvKernDSPLib          1.3com.apple.driver.AppleHDAController          2.2.5a5com.apple.iokit.IOHDAFamily          2.2.5a5com.apple.driver.AppleGraphicsControl          3.1.33com.apple.iokit.IONDRVSupport          2.3.4com.apple.iokit.IOGraphicsFamily          2.3.4com.apple.driver.AppleSMC          3.1.3d10com.apple.driver.IOPlatformPluginLegacy          5.0.0d8com.apple.driver.AppleSMBusPCI          1.0.10d0com.apple.driver.IOPlatformPluginFamily          5.1.1d6com.apple.driver.AppleUSBHIDMouse          175.9com.apple.driver.AppleHIDMouse          175.9com.apple.driver.AppleUSBHIDKeyboard          160.7com.apple.driver.AppleHIDKeyboard          160.7com.apple.iokit.IOUSBHIDDriver          5.0.0com.apple.driver.AppleUSBBluetoothHCIController          4.0.8f17com.apple.iokit.IOBluetoothFamily          4.0.8f17com.apple.driver.AppleUSBMergeNub          5.1.0com.apple.driver.AppleUSBComposite          5.0.0com.apple.iokit.IOSCSIMultimediaCommandsDevice          3.2.1com.apple.iokit.IOBDStorageFamily          1.7com.apple.iokit.IODVDStorageFamily          1.7.1com.apple.iokit.IOCDStorageFamily          1.7.1com.apple.iokit.IOFireWireFamily          4.4.8com.apple.iokit.IOSCSIArchitectureModelFamily          3.2.1com.apple.iokit.IO80211Family          420.3com.apple.iokit.IOUSBUserClient          5.0.0com.apple.iokit.IONetworkingFamily          2.1com.apple.iokit.IOAHCIFamily          2.0.8com.apple.iokit.IOUSBFamily          5.1.0com.apple.driver.AppleEFIRuntime          1.6.1com.apple.iokit.IOHIDFamily          1.7.1com.apple.iokit.IOSMBusFamily          1.1com.apple.security.sandbox          177.9com.apple.kext.AppleMatch          1.0.0d1com.apple.driver.DiskImages          331.7com.apple.iokit.IOStorageFamily          1.7.2com.apple.driver.AppleKeyStore          28.18com.apple.driver.AppleACPIPlatform          1.5com.apple.iokit.IOPCIFamily          2.7com.apple.iokit.IOACPIFamily          1.4Model: MacPro5,1, BootROM MP51.007F.B03, 8 processors, Quad-Core Intel Xeon, 2.4 GHz, 4 GB, SMC 1.39f11Graphics: ATI Radeon HD 5770, ATI Radeon HD 5770, PCIe, 1024 MBMemory Module: DIMM 2, 2 GB, DDR3 ECC, 1066 MHz, 0x80AD, 0x484D54313235553754465238432D48392020Memory Module: DIMM 6, 2 GB, DDR3 ECC, 1066 MHz, 0x80AD, 0x484D54313235553754465238432D48392020AirPort: spairport_wireless_card_type_airport_extreme (0x14E4, 0x8E), Broadcom BCM43xx 1.0 (5.106.198.19.22)Bluetooth: Version 4.0.8f17, 2 service, 11 devices, 1 incoming serial portsNetwork Service: Wi-Fi, AirPort, en2PCI Card: ATI Radeon HD 5770, sppci_displaycontroller, Slot-1Serial ATA Device: HL-DT-ST DVD-RW GH61NSerial ATA Device: WDC WD3200AAKX-00ERMA0, 320.07 GBUSB Device: Keyboard Hub, apple_vendor_id, 0x1006, 0xfd300000 / 2USB Device: Apple Optical USB Mouse, apple_vendor_id, 0x0304, 0xfd330000 / 4USB Device: Apple Keyboard, apple_vendor_id, 0x0220, 0xfd320000 / 3USB Device: BRCM2046 Hub, 0x0a5c  (Broadcom Corp.), 0x4500, 0x5a100000 / 2USB Device: Bluetooth USB Host Controller, apple_vendor_id, 0x8215, 0x5a110000 / 5FireWire Device: built-in_hub, 800mbit_speedAny insight? Tower seems remarkably quiet; I hope it&#x27;s not cooking itself. Above all, though, it is under warranty so would a genius bar visit be advised?

Grant Bennet-Alder · Answer

That kind of error: machine check, status 4 or 5, caused by stuff called from CPU Power Management...Is almost certainly an uncorrectable memory error.It is time to buy some new DIMMs for it. Your Mac Pro 5,1 does not need pairs, and buying new modules smaller than 8GB does not really make sense any more.as for finding that bad DIMM. try keeping an eye on About this Mac &gt; ( More Info ) &gt; Memory...The detailed table that shows the status of each DIMM often shows single bit errors accumulating before the double-bit error that halts the machine. You could also try Apple Hardware Test, but false negatives are common unless you loop the test and run overnight, or use Rember or Memtest.

Maronan · Answer

About this Mac &gt; Memory doesn&#x27;t say much; just:  Size:          2 GB  Type:          DDR3 ECC  Speed:          1066 MHz  Status:          OK  Manufacturer:          0x80AD  Part Number:          0x484D54313235553754465238432D48392020  Serial Number:          0x20C244E4And similar for the other one.Rember is running now so I&#x27;ll see, On the plus side, the three 8GB sticks I ordered have cleared Memphis and are en route so if it is a memory problem it&#x27;ll soon be sorted.I just discovered, though, that I do not have a recovery mode partition (command-R does nothing) and holding D on startup for apple hardware test doesn&#x27;t work either.

The hatter · Answer

CCC can create and move or copy Recovery Rember is good but it doesn&#x27;t allow the options when memtest is run in TerminalAHT is not on your hard drive. And Mac Pro does not have internet version. That means you need your Mac&#x27;s OEM DVD in the optical drive bay to invoke and run it.

Grant Bennet-Alder · Answer

This is the display you will see when there are errors that are being corrected:.

Maronan · Answer

I ran Rember/Memtest (basically the same thing it seems) and it reported no errors with the RAM. I set it to run 6 more times and came up clean each time. Is a memory error likely to go unnoticed through 7 rounds of Memtest? Or is it probably something else causing the kernel panics?

Grant Bennet-Alder · Answer

The Mac Pro features Error Correcting Code Memory. Extra syndrome bits are stored with each word in memory. When read back, there is enough information to both detect and correct single-bit errors. This is done by Hardware in the Xeon Processor in less tahn one additional memory cycle, and your Mac keeps working. In the background, most of these correcxted errors are noted in the memory display I posted above.Most double-bit erriors cannot be corrected, and they cause the machine to halt to avoid poisoning your data. This causes a very distinctive kernel panic with Machine check and reason 4 or 5. In some cases, the exact module cuasing the problem may be called out, in other cases not.Your error is a machine check with reason code 4 or 5. That is almost always memory error. Software is generally incapable of causing a machine check.Finding memory errors can be extremely tedious, and may take several days of running all-night tests and keeping an eye on the memory display. 7 passes of memtest is nothing.----When the error will not show itself, One desperation move I have used is to shuffle the memory modules in a predictable way, so that they move to different addresses. This sometimes changes the symptoms enough to cause the problem to be found, but sometimes not.