Mac Forums

Mac Forums (
-   OS X - Operating System (
-   -   G5 keeps crashing (

futerfas 04-25-2004 07:35 PM

G5 keeps crashing
My new G5 keeps crashing. When i look at the logs, i get this "PMU FORCED SHUTDOWN, CAUSE = -122" I seem to have this problem in there more then once. Any ideas?

witeshark 04-25-2004 07:44 PM

First thing to try is repair permissions. After every software update, and about every 2 weeks: close all apps and log totally off. Log on, go in Finder, Applications. Utilities, Disk Utility. After the message -getting disk information- select volume (below the hard drive name -upper left corner). Just highlight it. Now look to the lower two things are there near the middle, verify permissions, repair permissions. Click repair permissions

futerfas 04-25-2004 07:54 PM

I've tried that many times. I also got this:
"Dec 31 16:00:03 localhost kernel: ApplePMU::PMU FORCED SHUTDOWN, CAUSE = -122
Dec 31 16:00:03 localhost kernel: ApplePMU::CLOCK RESET! PMU WAS PROBABLY RESET SOMEHOW!!"

witeshark 04-25-2004 08:02 PM

Boot into single user Boot - hold command S and in the terminal you are then in type /sbin/fsck -fy and repeat until ********FILE SYSTEM CHANGED***** does not show It's alos possible the back up battery is dead

TylerMoney 04-26-2004 12:45 AM

it could be a ram might have gotten bad ram..not neccesarily the memmory chip being bad, but that it won't work right in a mac...for the mac doesn't like only likes really good, specific memmory.

WilliS 04-26-2004 08:46 AM

definately a power issue... i just dont know how to go about resetting apple's power management unit... um.. im clueless sorry... but try typing in your error on google and see what is said about it... ive seen a lot of talk about the -96 error on the xserves... and powerbooks... so maybe they will have a fix to the problem

btw, repairing permissions has never helped me... certainly not the solution to everything ;)

infact... ive never once repaired permissions on my ibook for 3 years now... put that in your pipe and smoke it! ;) ;) :D

futerfas 04-26-2004 06:23 PM

Called apple, that error message ment there was a HFS error and we fixed it.

witeshark 04-26-2004 06:34 PM

I'd like to know how for future reference cause an error in the Hierarchical File System may be a big deal!

elreiu 11-25-2005 04:32 AM

Pmu Forced Shutdown Cause = -122

Originally Posted by futerfas
Called apple, that error message ment there was a HFS error and we fixed it.

Hello Futerfas,

I'm having the same problem (PMU FORCED SHUTDOWN CAUSE = -122).

Please, could you tell some details about HOW you fixed the HFS-Problem?

You would help not only me but a lot of people because there are many who have this problem. I've been searching the www for hours and have tried different things like resetting the PMU - nothing helped. Your solution - if it is really one - seems very interesting to me!

Thank you, elreiu.

sonomac 01-03-2007 09:08 PM

I was having random shutdowns on my G5 dual 2.3, along with PMU forced shutdown -122 messages. After a couple of months of reading forum posts I stumbled upon a site
where I was able to clean my power supply unit, which it sorely needed, and have been running for 5 days without a random shutdown when I usually had 2 a day. I will continue to report on this success.

All times are GMT -4. The time now is 04:40 AM.

Powered by vBulletin
Copyright ©2000 - 2015, Jelsoft Enterprises Ltd.