[chaz720]

I just wanted to follow up to my post on the previous page about the “shutdown cause = -122″ issue I was having.

I’ve since bought a replacement power supply unit (I’m out of warrenty) for my 20” iMac G5 and it has been up and running for about 3 weeks now without any problems.

I’m calling it fixed.

[chaz720]

Sorry for resurrecting such a stale thread but…

Most searches for “shutdown cause = -122″ lead you back to this thread in one way or another, and unfortunately this has turned out to be my dead end.

I’m getting the AppleSMU forced shutdown cause = -122 message not on an xServe but on a 20” iMac. It’s the 2 GHz G5 version with the ambient light sensor. It’s running OSX 10.4.8. I’ve tried resetting the SMU to no avail. I’ve run iStat and just stared at it until it shut down and the temperatures for the CPU and hard drive were both nominal (130F and 110F respectively) when it shut itself off.

One person in this thread claimed to be able to reproduce it by yanking the power cord, and I tried the experiment myself a while back but got a different shutdown code (“shutdown cause = -110” iirc) It also was not on a UPS at the time the problem developed. I tried buying a UPS (APC ES 350) and the problem didn’t go away. Then finally, around the begining of November (month and a half ago) I shut the machine down, pulled the plug and let it sit there for a couple days like that. Plugged it in, powered it up, and it stayed up until yesterday ( > 40 days). I thought the problem had vanished as mysteriously as it appeared, but alas, “-122” is back again. I turned the machine back on and only got to the log-in screen before it shut back down.

I let it sit for a day and came back, and here I am now. It’s been up for a few hours, and I’ve been searching for any updates to threads since my last battle but I’m having no luck. If anyone has gotten this monkey off their machine I’d definitely be interested in hearing the secret.

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