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Old 11-12-2011, 03:54 PM   #1
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Registered: Jul 2011
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Why did my computer suddenly shut down?

Hi, I am relatively new to GNU/linux and using slackware and something very weird happened and I would really appreciate some help figuring out what it was. Thank very much.

My terminal suddenly printed something like "broadcast message from root" but I couldn't finish reading because my computer suddenly shutdown.

Here is the relevant parts of /var/log/messages

I changed all my passwords immediately in case someone had found it an "ssh" into my computer to shut it down, but I don't think this is actually what happened. On the other hand I do not know what did happen and I am a bit worried about it, as well as of course not wanting it to happen in future.

So any advice on how to track this down or thoughts on what it might be would be greatly appreciated. Thanks again..
Old 11-12-2011, 03:59 PM   #2
Registered: Oct 2011
Distribution: Slackware, Fedora
Posts: 158

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Nov 12 21:29:09 darkstar logger: ACPI group thermal_zone / action THM is not defined
Usually that implies a high temperature, so my guess would be an overheat. As for the cause of it overheating, I know some fans aren't particularly linux-friendly, so it may be that the fan didn't turn on. If the fan was on, it may be a hardware issue.
Old 11-12-2011, 08:39 PM   #3
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Registered: Jan 2006
Location: Virginia, USA
Distribution: Slackware, Debian, Mageia, and whatever VMs I happen to be playing with
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Overheating is the most common cause of unexpected shutdowns.

Make sure all the vents are clear and remove any dust build-up from inside the computer. If it's a desktop, open up the case and carefully vacuum it out, making sure to touch nothing with the vacuum. As an alternative, you can blow it out with canned compressed air, but I prefer the vacuum; it removes the dust, instead of just moves it.

If it's a laptop, vacuum the vents and make sure it's not sitting on a soft surface which could block the vents on the bottom.

I vacuumed out my file server and made all the overheating messages go away.

Last edited by frankbell; 11-12-2011 at 08:41 PM.
Old 11-12-2011, 09:08 PM   #4
Registered: May 2007
Location: California
Distribution: Slackware/Ubuntu
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I have a dell inspiron 5150 and I had to install the application dellfand to set temperatures when the fan would go on and off.


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