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Old 03-08-2012, 02:19 AM   #1
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Which log to view to see the cause of an errant software power off command?

Hi, I'm running Natty on an R32 Thinkpad and have been having random instantaneous poweroffs on occasion. I removed the barely chargeable battery and all was well for a couple of months on AC power, but then it happened again. I am generally only running Firefox on my home wireless AP, and am wondering if there is any way to see what is sending the software poweroff command. There is no unusual software that would be suspect and the power cord is the only external connection. I have viewed some of the logs but would like to know the best way to troubleshoot this. Thanks, TT
Old 03-08-2012, 07:32 AM   #2
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is the machine going through the shutdown sequence or is it just powering down as if the power was cut?
Old 03-08-2012, 10:18 PM   #3
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It shuts down instantly. The screen goes black, I hear the hard drive click and spin down, just like at the end of a normal shut down, but without any of the usual orderly steps to save data, etc. It was fine for many months then started doing this instant poweroff about every 4-5 days. After removing the battery, it ran fine up until a few days ago, then did its drop dead routine again. It did impel me to back up everything, at least. I have the feeling that this is software related and am looking for the means to determine this. Thanks, TT
Old 03-09-2012, 08:53 PM   #4
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Originally Posted by tt9685 View Post
It shuts down instantly.
It sounds like overheating to me. That's the leading cause of unexpected shutdowns.

Make sure the fans are working and the vents are clear of dust and lint.

If there's anything in a log, it's likely in /var/log/messages, but, when a system shuts down like that, if often doesn't get the chance to write to a log.
Old 03-09-2012, 09:07 PM   #5
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Would recommend running temperature monitor utility to determine if this is the exact cause.

It will take time but eventually you will learn many things.

Do share your exp here.


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