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merwetta1 asked on

Unable to shutdown G5 running 10.5.8

I've got a problem with my Mac Dual 1.8 GHz G5 running OS 10.5.8, and I would appreciate any ideas on how to troubleshoot it.

For the last several days, when I arrive at my computer in the morning, it acts sluggish. I have MenuMeters installed, so I can see the activity of both CPUs in my menu. With all programs shut down except the Finder, I see one CPU getting hammered. The Activity Monitor does not show any program using resources except Activity Monitor itself. The "top" command in terminal does not show anything either. I know the computer is in an "altered state", because any programs I launch act extremely sluggish, and then when I try to shut down, all programs quit, but the computer hangs with the "loading" icon going round and round forever (with nothing else on the screen).

I was running Mozy, but I uninstalled it. I do not have any backup or antivirus programs scheduled to run overnight. If I reboot the computer, everything works fine (including shutdown) until I leave it unattended for the night.

Any suggestions how to solve this problem?
Mac OS XMozy

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merwetta1

8/22/2022 - Mon
SOLUTION
strung

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ASKER
merwetta1

The only repeating error I see in my system.log is the UniNEnet::restartReceiver error, which I also get when the computer seems to be working fine. That error seems to be an annoyance more than a problem according to an apple forum thread. http://discussions.apple.com/thread.jspa?threadID=2111635&tstart=0

The daily.out log shows successful completion of the daily routines every night at 3:15am.

If there is any other log I should look at, let me know.

I emptied the system and user cache folders for good measure, followed by a shutdown and unplug.
mccrick

You could have X. Try Y to isolate:

1 A hardware problem (processor, logic, HD). Boot with a different start disk, create one with a firewire disk and OS installer.
2. a corrupted user. Create a test user
3. corrupt OS. Do Archive install or see #1
4. corrupt HD /  Directory Structure. Run Disk Warrior
5. Fouled up boot caches. Safe Boot to clear and rebuild caches. Might try clearing things up with Cocktail for Mac: http://download.cnet.com/Cocktail/3000-18512_4-10968063.html

Those G5 dual boot machines did have a tendency to blow a processor. This is not an easy repair because (I was told by a very trusted full time Apple Tech) the replacement processors don't always work together or with every logic board. If you do have try to replace a processor or logic board, they often need to replace both processors and the logic board. Talk about about a $ad Mac.
ASKER
merwetta1

The problem did not return today for the first time in 5 days. The only real change has been the emptied cache folders. I'm going to leave this question open for a few days while I see if the problem comes back.

During the early phases of troubleshooting, I tried booting into single user mode, running fsck, booting into safe mode, repairing permissions, and running Cache Out X. None of that helped. There were some permissions that Disk Utility claimed to fix, but they kept coming back on repeat runs and still do.

mccrick, none of your solutions explain why the machine goes south when it is unattended overnight, but works fine as long as I'm using it frequently. I agree they are all possibilities to explore before a wipe, but they are unlikely, since the machine works great during the day. I will try them, though, if the problem comes back and I still can't find a solution.

I have this problem posted at MacOSXHints.com also, and one helpful piece of advice I received was to make sure to view all processes in Activity Monitor instead of just "My Processes." Doh!
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ASKER CERTIFIED SOLUTION
mccrick

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ASKER
merwetta1

Thanks for the good suggestions mccrick. I deleted everything in:
/Library/Caches
~/Library/Caches

Not sure if that includes boot caches. Cocktail only runs on Intel machines for OS 10.5 (even the oldest version available).
ASKER
merwetta1

The problem has not returned, so I think deleting the cache folders was the solution.