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Unexpected Freeze, Hang, Shut Down

This has been happening for a while now and I still haven't gotten to the bottom of it.

At least a couple times a day, my Mac Pro (OS 10.5.7) will simply freeze completely with no mouse/keyboard control or it will just shut itself down. Doesn't seem to be any connection to a particular application running. I can be simply composing an email, browsing in Safari, working in Photoshop, or pretty much anything. A couple times it even happened within a minute of restarting with no applications running. It's also happened after I've left the computer alone for a while and the screen saver is stuck.

If I happen to be listening to something in iTunes the music will stop and sound like it's in an endless loop playing a split second of the song.

Every time my only solution is to shut power off an on again. I've tried waiting for many minutes, but nothing happens. Luckily, I haven't lost any important work, but I know it's bound to happen sooner or later.

I contacted Apple and got the suggestion to clear my Library caches and Safari cache, etc... I even went through the time to re-install using my original OSX disc and subsequently re-installing all my drivers. That seemed to fix the problem but not really because it started happening again a couple days later.

Any help out there???

Thanks.

Mac Pro, Mac OS X (10.5.7), MacBook Pro, original iPhone

Posted on Jun 19, 2009 4:06 PM

Reply
43 replies

Jun 23, 2009 3:00 PM in response to Carolyn Samit

Well it didn't take long to find out.

Both my screens (dual monitor setup) went black and keyboard was unresponsive. Had to shut down and power up again. I've gotten into the habit of saving work often as I go, so I still haven't lost anything. Of course everything is backed up as well.

Thanks for all your help so far.

Any more ideas out there??

Aug 10, 2009 9:54 AM in response to Carolyn Samit

Well, I'm still having this problem and it's just as annoying.

I was thinking... I used use all PC's at my former job and I remember a lot of strange problems on people's computers were caused by the video card. Because some of my MacPro crashes/hangs resulted in weird stuff showing up on my display or blank screens, I'm wondering if I might have some luck replacing my video card or at least try reseating it.

Anyone have any thoughts???

Rob

Aug 11, 2009 10:23 PM in response to smilingdog

For anyone who might be able to make sense of this, here's part of the Problem Details that was reported after restarting after the last hang/crash. You'll see that it happened about 10 minutes ago...



Tue Aug 11 22:10:09 2009
Machine-check capabilities (cpu 3) 0x0000000000000006:
family: 6 model: 15 stepping: 6 microcode: 198
Intel(R) Xeon(R) CPU 5160 @ 3.00GHz
6 error-reporting banks
Machine-check status 0x0000000000000005:
restart IP valid
machine-check in progress
MCA error-reporting registers:
IA32 MC0STATUS(0x401): 0xb200004000000800 valid
MCA error code: 0x0800
Model specific error code: 0x0000
Other information: 0x00000040
Status bits:
Processor context corrupt
Error enabled
Uncorrected error
IA32 MC1STATUS(0x405): 0x0000000000000000 invalid
IA32 MC2STATUS(0x409): 0x0000000000000000 invalid
IA32 MC3STATUS(0x40d): 0x0020000000000000 invalid
IA32 MC4STATUS(0x411): 0x0000000000000011 invalid
IA32 MC5STATUS(0x415): 0xb200121020080400 valid
MCA error code: 0x0400
Model specific error code: 0x2008
Other information: 0x00001210
Status bits:
Processor context corrupt
Error enabled
Uncorrected error
panic(cpu 3 caller 0x001AAA68): Machine Check at 0x00acd712, thread:0x9eee000, trapno:0x12, err:0x0, registers:
CR0: 0x80010033, CR2: 0x14df6000, CR3: 0x00f2f000, CR4: 0x00000660
EAX: 0x00000000, EBX: 0x094f0e40, ECX: 0x00000001, EDX: 0x00ad32a0
ESP: 0x7e8b7a80, EBP: 0x7e8b7aa8, ESI: 0x094ca084, EDI: 0x00ad26c8
EFL: 0x00000002, EIP: 0x00acd712

Backtrace (CPU 3), Frame : Return Address (4 potential args on stack)
0x77b32fb8 : 0x12b4c6 (0x45ec20 0x77b32fec 0x13355c 0x0)
0x77b33008 : 0x1aaa68 (0x468bc0 0xacd712 0x9eee000 0x12)
0x77b330e8 : 0x1a2553 (0x77b33100 0x0 0x0 0x0)
0x7e8b7aa8 : 0xac3539 (0x77aa20a4 0x1 0x94ca084 0x0)
0x7e8b7b98 : 0xac422e (0x3cd441a0 0x8000006b 0x0 0x0)
0x7e8b7c58 : 0x1ac348 (0xffffffff 0x7fffffff 0x7e8b7c88 0x77ab2000)
0x7e8b7c78 : 0x1358e1 (0x77ab24c0 0x3cd4400e 0x6b 0x77ab24ac)
0x7e8b7cc8 : 0x136217 (0x1 0x9eee000 0x9419b54 0x141ade)
0x7e8b7d38 : 0x136e7c (0x9eee01c 0x9eee01c 0x7e8b7d68 0x9eee000)
0x7e8b7d78 : 0x136f20 (0x12081a 0x0 0x0 0x1a436f)
0x7e8b7d98 : 0x121286 (0x12081a 0x5424e0 0x0 0x2)
0x7e8b7df8 : 0x1274de (0xa2f5fcc 0x3000103 0x8000 0x6)
0x7e8b7f08 : 0x198fa3 (0x7e8b7f44 0x0 0x0 0x0)
0x7e8b7fc8 : 0x1a1cea (0x9fdf960 0x0 0x1a40b5 0xb8f6e20)
No mapping exists for frame pointer
Backtrace terminated-invalid frame pointer 0xbfff75c8
Kernel loadable modules in backtrace (with dependencies):
com.apple.driver.AppleIntelCPUPowerManagement(76.0.0)@0xac1000->0xadffff

Aug 11, 2009 10:25 PM in response to smilingdog

An educated guess, based on this chunk of the error report:

Backtrace terminated-invalid frame pointer 0xbfff75c8
Kernel loadable modules in backtrace (with dependencies):
com.apple.driver.AppleIntelCPUPowerManagement(76.0.0)@0xac1000->0xadffff

You've got a power supply issue on your hands--if your under warranty, bring a copy of this log and ask for a replacement.

~Lyssa

Aug 11, 2009 10:36 PM in response to smilingdog

Hmmm... I did a little searching and found that the ATI Radeon X1900 XT card (which I have) has a history of overheating and causing problems such as screen black outs. First, I'll try Dave's suggestion but will also look into my video card some more.

Here's one of a number of forums where the issue has been discussed...

http://forums.macnn.com/65/mac-pro-and-power-mac/341741/video-card-issue-my-mac- pro/

Unexpected Freeze, Hang, Shut Down

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