Take the 2-minute tour ×
Super User is a question and answer site for computer enthusiasts and power users. It's 100% free, no registration required.

Since I updated to 11.04 my Computer seems to restart randomly. The screen goes black, sometimes it comes back If I move the mouse or press a key on the keyboard (but maybe that was just coincidence) but most of the time the screen stays black for about 15 seconds and after that I see the spash screen of my BIOS and the computer is restarting.

It seems to only happen when I am not using the computer directly (manipulating mouse or keyboard). So most of the time I will come back to the computer and it will just present the login-screen or the screen will go black while I am watching a video, listening to music etc.

I am using Ubuntu Classic without effects with the proprietary nVidia drivers.

share|improve this question
    
Just saw there is a "stackoverflow" for ubuntu :-> –  Plankalkül May 21 '11 at 15:00
    
Flag your post (with the link under the "ubuntu-11.04" tag and ask a mod to move it if you want. I think Ubuntu questions are still considered on topic here, though. –  jonsca May 21 '11 at 15:36
    
Don't bother moving the post. Sounds a lot like a hardware problem, which is on-topic here. –  Turbo J May 21 '11 at 17:16
    
Some Addition: It seems to happen when the CPU is doing a lot of work and I am not moving the mouse or typing on the keyboard. So it does sound a bit like a heat problem although I am not sure if that is the whole story. Think I will test it out while letting a little script write temperature information to a file. –  Plankalkül May 24 '11 at 21:06

2 Answers 2

You are going to want to check the logs to see if you can figure out what is happening.

Log files are stored in /var/log

The first log I would look in would be kern.log.

Also, I don't want to discourage you from asking here, but you would probably get a better answer asking on the ubuntu forums.

share|improve this answer
    
Seems like it might be overheating. If so, kern.log will likely have messages like "CPU thermal limit exceeded". –  Mechanical snail Aug 18 '11 at 19:49
    
Good information thank you! –  Giovanni Azua Sep 27 '13 at 8:35

While you problem sound like hardware (check cables and connectors!) I have another wild guess: Screen saver.

Ubuntu ships 3D screensavers, and sometimes they can youse problems with the GFX card in 3D mode. Try to set the screen saver to "blank screen".

share|improve this answer

Your Answer

 
discard

By posting your answer, you agree to the privacy policy and terms of service.

Not the answer you're looking for? Browse other questions tagged or ask your own question.