G5 dual 2.7 kernel panic

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G5 dual 2.7 kernel panic

I have my brother's power mac G5. He bought it used recently so I have no history. It will run fine for days if you don't tax it, but if you put something in the trash and secure empty the trash it freezes and the window pops up to push the power button to restart (a kernel panic). I ran the G5 disc and ran the hardware test, everything checks out OK. I ran an after market tool for the G5 and the hardware test is OK. I swapped out the memory same issue. I ran a memory test rember and it froze and needed to be restarted after about 3 minutes in. I have a second hard drive from another G5 same OS and the same things happen with it in. The log says something about CPU 0. Does that mean even though it passes the hardware test the processor is going bad?

power Mac G5, Mac OS X (10.5.8)

Posted on Jan 29, 2011 2:45 PM

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Answer 1

BDAqua

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Jan 29, 2011 2:50 PM in response to construct30

Get Temperature Monitor to see if it's heat related...

http://www.macupdate.com/info.php/id/12381/temperature-monitor

And/or iStat Pro...

http://www.islayer.com/apps/istatpro/

If you have any temps in the 70°C/160°F range, that's likely it.

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Answer 2

construct30 Author

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Jan 29, 2011 4:26 PM in response to BDAqua

I ran the isat one, it said the user was using from 68 to 100 percent. When it froze it was at 64%. CPU A was 76 degrees and CPU B was at 71 degrees.

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Answer 3

Jan 29, 2011 4:29 PM in response to construct30

C or F? If C that's too hot. Have you opened it up and checked for dust build up and have you vacuumed out the air vents?

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Answer 4

construct30 Author

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Jan 29, 2011 4:45 PM in response to construct30

I ran the other temp monitor. CPU A was bouncing between 79 to 82.4 degrees C and CPU B was staying right around 74. When it froze CPU A was 81.3 and B was 76.

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Answer 5

construct30 Author

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Jan 29, 2011 4:48 PM in response to DaddyPaycheck

It is spotless inside no dust holes all open fans are working slow when it is cool fast as a jet engine when temp gets up and computer freezes.

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Answer 6

BDAqua

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Jan 29, 2011 4:49 PM in response to construct30

Yeah, that's the problem, if it's liquid cooled check for corrosion or leaks...

http://www.xlr8yourmac.com/systems/G5coolantleaks.html

http://www.xlr8yourmac.com/systems/G5CoolantLeak_Repair/G5_CoolantLeakRepair.html

If Air cooled, have you blown all the dust out of it? It may even need the Thermal paste replaced between the CPUs & heatsinks.

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Answer 7

construct30 Author

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Jan 29, 2011 5:19 PM in response to BDAqua

It is really clean inside, like new, no dust at all, no coolant leaking. It runs quiet and nice and cool 46 until I start running the memory test or secure empty trash. I played chess temp went to 49 or 50 C, there is not much loaded on the computer yet to run.

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Answer 8

BDAqua

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Jan 29, 2011 5:29 PM in response to construct30

Hmmm, see how many iteration you can run with this before the temps get too high...

http://www.macupdate.com/app/mac/9641/power-fractal

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Answer 9

construct30 Author

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Jan 29, 2011 6:30 PM in response to BDAqua

I loaded the power fractal. It was set at color speed of 10 and started at maximum count 262144. I went from one to the next, it ran at about 80 to 82 C while it ran, then cooled down to 46 or so in a few seconds after it loaded. I ran it Maximum count 524288, then 1048576, then 2097157, then 4194304 and it froze about 7/8 of the way through.

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Answer 10

BDAqua

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Jan 29, 2011 6:39 PM in response to construct30

Do the fans speed up when the temp goes up?

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Answer 11

construct30 Author

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Jan 29, 2011 6:58 PM in response to BDAqua

Yes, they just sort of purr when it is at idle and cool and then when the temp goes up it sounds like a small jet engine running. The one disc of hardware tests, ran the fans and tested all that and it tested good. On the desktop widget you had me download, the rpms went up and it also track the coolant pumps. The CPU user usage was up to 80% to 100% while the trash was emptying, that seems odd to me.

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Answer 12

BDAqua

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Jan 29, 2011 9:04 PM in response to construct30

the trash was emptying, that seems odd to me.

Indeed, while I still suspect the thermal paste needs redoing, with the latest data, At this point I think you should get Applejack...

http://www.macupdate.com/info.php/id/15667/applejack

After installing, reboot holding down CMD+s, (+s), then when the DOS like prompt shows, type in...

applejack AUTO

Then let it do all 5 of it's things.

At least it'll eliminate some questions if it doesn't fix it.

The 6 things it does are...

Correct any Disk problems.
Repair Permissions.
Clear out Cache Files.
Repair/check several plist files.
Dump the VM files for a fresh start.
Trash old Log files.

First reboot will be slower, sometimes 2 or 3 restarts will be required for full benefit... my guess is files relying upon other files relying upon other files! 🙂

Disconnect the USB cable from any Uninterruptible Power Supply so the system doesn't shut down in the middle of the process.

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Answer 13

construct30 Author

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Jan 30, 2011 6:34 AM in response to BDAqua

I ran applejack. It said it was OK except:

Started verify/repair permissions on disk disk0s3 owl\
Permissions differ on "private/var/root/Library", should be drwx------ , they are drwxr-x--- \
Permissions differ on "private/var/root", should be drwxr-x--- , they are drwxr-xr-x \
Permissions differ on "private/var/spool/cups/cache/rss", should be drwxr-xr-x , they are drwxrwxr-x \
\
Finished verify/repair permissions on disk disk0s3 owl\
Permissions have been repaired. -0-\

I Found an article that might help me if it is an overheating problem. A small leak causes some corrosion to form that blocks the heat transfer. http://www.xlr8yourmac.com/systems/G5CoolantLeak_Repair/G5_CoolantLeak_Repairp1.html#storytop

Would that cause the processor to run at such a high user rate, too, or is one of the processors just on its way out?

By the way BDAqua thanks for all the time and effort.

Message was edited by: construct30

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Answer 14

BDAqua

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Jan 30, 2011 9:45 AM in response to construct30

A small leak causes some corrosion to form that blocks the heat transfer.

Yes, & I've read a few where there was no apparent leak at all, but the coolant was either gone or gummed up.

Would that cause the processor to run at such a high user rate, too, or is one of the processors just on its way out?

Are you talking about CPU% in activity Monitor? If so, what process is using it?

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