Hard Crash Cause?

Question

I&#x27;ve been having regular hard crashes on my G5 PPC running 10.5.8 about every 3 or 4 days.Only thing that I&#x27;ve added or changed recently is the addition of an Apple USB modem.Hope it&#x27;s ok to post the report here. Any help greatly appreciated.Thanks,CarlInterval Since Last Panic Report:  69534485 secPanics Since Last Report:          4Anonymous UUID:                    6DB2AB21-D876-4E02-891B-623445497650Fri May 11 07:51:50 2012Unresolved kernel trap(cpu 0): 0x400 - Inst access DAR&#x3D;0x00000000E00C0000 PC&#x3D;0x0000000000000000Latest crash info for cpu 0:   Exception state (sv&#x3D;0x3f035500)      PC&#x3D;0x00000000; MSR&#x3D;0x40009030; DAR&#x3D;0xE00C0000; DSISR&#x3D;0x40000000; LR&#x3D;0x00000000; R1&#x3D;0x3DFF79D0; XCP&#x3D;0x00000010 (0x400 - Inst access)      Backtrace:0x00000000 0x00000003 0x0036C0E4 0x00000000 0x3D9F7A40 0x3DA0DACC          0x3DB37D0C 0x3DB330E8 0x3DB368D4 0x3DB2D0FC 0x3DB2D040 0x0035CED0 0x0035C134 0x0035C1E8          0x000B1DD4       Kernel loadable modules in backtrace (with dependencies):         com.apple.driver.AppleUSBEHCI(3.4.6)@0x3db28000-&gt;0x3db3efff            dependency: com.apple.iokit.IOUSBFamily(3.5.2)@0x3d9f3000            dependency: com.apple.iokit.IOPCIFamily(2.6)@0x355a4000         com.apple.iokit.IOUSBFamily(3.5.2)@0x3d9f3000-&gt;0x3da29fffProceeding back via exception chain:   Exception state (sv&#x3D;0x3f035500)      previously dumped as "Latest" state. skipping...   Exception state (sv&#x3D;0x3d7e4a00)      PC&#x3D;0x00000000; MSR&#x3D;0x0000D030; DAR&#x3D;0x00000000; DSISR&#x3D;0x00000000; LR&#x3D;0x00000000; R1&#x3D;0x00000000; XCP&#x3D;0x00000000 (Unknown)BSD process name corresponding to current thread: kernel_taskMac OS version:9L31aKernel version:Darwin Kernel Version 9.8.0: Wed Jul 15 16:57:01 PDT 2009; root:xnu-1228.15.4~1/RELEASE_PPCSystem model name: PowerMac7,3System uptime in nanoseconds: 555896824741354unloaded kexts:com.apple.driver.InternalModemSupport    2.4.0 - last unloaded 5184263605245loaded kexts:com.paceap.kext.pacesupport.leopard    5.8com.Cycling74.driver.Soundflower    1.5.1com.microsoft.driver.MicrosoftMouseUSB    7.1com.microsoft.driver.MicrosoftMouse    7.1com.apple.filesystems.afpfs    9.0.2 - last loaded 5301630506450com.apple.nke.asp_tcp    4.7.1com.apple.driver.MotorolaSM56KUSB    1.5.10com.apple.filesystems.udf    2.0.2com.apple.filesystems.smbfs    1.4.6com.apple.filesystems.msdosfs    1.5.5com.apple.filesystems.autofs    2.0.2com.apple.driver.AppleTopazAudio    2.5.8f1com.apple.driver.AppleTAS3004Audio    2.5.8f1com.apple.driver.DiskImages    199com.apple.driver.AppleFCU    1.3.2b0com.apple.driver.AppleK2Fan    1.0.10f1com.apple.driver.AudioIPCDriver    1.0.6com.apple.driver.AppleSlewClock    1.5.2d0com.apple.driver.AppleHWSensor    1.9d0com.apple.iokit.IOFireWireIP    1.7.7com.apple.driver.AppleLM7x    1.9d0com.apple.iokit.AppleGMACEthernet    1.5.9f1com.apple.driver.AppleCPUVoltage    1.5.2d0com.apple.ATIRadeon9700    5.4.8com.apple.driver.AppleUSBDisplays    2.0.2com.apple.driver.AppleVSP    2.2.2com.apple.driver.AppleK2Driver    1.7.2f1com.apple.driver.AppleHWClock    1.5.2d0com.apple.driver.PowerMac7_2_PlatformPlugin    3.4.0d0com.apple.driver.AppleMaxim6690    1.9d0com.apple.driver.AppleI2S    1.0.1f1com.apple.driver.AppleAD741x    1.9d0com.apple.driver.AppleUSBMergeNub    3.5.2com.apple.iokit.IOUSBMassStorageClass    2.0.8com.apple.iokit.IOSCSIMultimediaCommandsD&#x60;

Klaus1 · Answer

Kernel panics are nearly always hardware related, often because of faulty RAM. Perhaps the following may nhelp:What is a Kernel Panic?http://support.apple.com/kb/TS3742and  http://support.apple.com/kb/TS1892?viewlocale&#x3D;en_UShttp://developer.apple.com/mac/library/technotes/tn2002/tn2063.htmlMore details here:http://www.thexlab.com/faqs/kernelpanics.htmlUseful article on how to avoid and eliminate kernel panics here:http://reviews.cnet.com/8301-13727_7-10344626-263.html?tag&#x3D;mfiredir

Texas Mac Man · Answer

If you disconnect the USB model does it still KP?Understanding crash logs isn’t easy and it’s hard (sometimes impossible) to decipher the cause of the problem. Take a look at Apple’s Crash Reporter document at http://developer.apple.com/technotes/tn2004/tn2123.html Also look at Tutorial: An introduction to reading Mac OS X crash reportshttp://www.macfixit.com/article.php?story&#x3D;20060309075929717Kernel panics are usually caused by a hardware problem – frequently RAM, a USB device or a Firewire device. What external devices do you have connected? When trying to troubleshoot problems, disconnect all external devices except your monitor, keyboard and mouse. Do you experience the same problems? To eliminate RAM being the problem, Look at this link: Testing RAM @ http://guides.macrumors.com/Testing_RAM Then download &amp; use Memtest &amp; Ramber.Do you have an Apple Hardware Test disc (the AHT is on the Install/Restore DVD that came with your Mac)? Running the Apple Hardware Test in Loop Mode is an excellent troubleshooting step for finding intermittent hardware problems. It is especially useful when troubleshooting intermittent kernel panics. If Loop Mode is supported by the version of the Apple Hardware Test you are using, you run the Extended Test in Loop Mode by pressing Control-L before starting the test. Looping On should appear in the right window. Then click the Extended Test button.The test will run continuously until a problem is found. If a problem is found, the test will cease to loop, indicating the problem it found. If the test fails, be sure to write down the exact message associated with the failure.In some cases, RAM problems did not show up until nearly 40 loops, so give it a good run.May be a solution on one of these links.http://docs.info.apple.com/article.html?artnum&#x3D;106227What&#x27;s a "kernel panic"? (Mac OS X)http://www.macmaps.com/kernelpanic.htmlMac OS X Kernel Panic FAQhttp://www.index-site.com/kernelpanic.htmlMac OS X Kernel Panic FAQhttp://www.thexlab.com/faqs/kernelpanics.htmlResolving Kernel Panicshttp://www.macfixit.com/article.php?story&#x3D;20060911080447777Avoiding and eliminating Kernel panics http://macosg.com/group/viewtopic.php?t&#x3D;80012-Step Program to Isolate Freezes and/or Kernel Panics Cheers, Tom 😉