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When I close the lid or leave the computer on for a bit the screen goes black and freezes that way. I have tried changing both screen and power settings as well as changing workspaces. Nothing seems to unfreeze or wake-up the computer.

I just installed 11.10 from 11.04, never had this problem with 11.04. Was able to close and open lid just fine.

Considering reinstalling...

Help?

Knowledge Cube
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Scott
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  • This question should instead be filed as a bug report, thanks! [Instructions here](http://askubuntu.com/questions/5121/how-do-i-report-a-bug). – Jorge Castro Feb 03 '12 at 01:15

2 Answers2

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It sounds like you're having trouble with hibernation, which is invoked by closing (and opening) the lid. Look at /var/log/pm-*.log, man pm-hibernate and the files in the pm-utils package (do dpkg -L pm-utils). When my Ubuntu 11.10 hibernates, it also locks the screen (I think this is good). Could your system be trying to lock the screen and getting confused?

waltinator
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  • If my computer is confused, then I'm screwed. I am not the most savvy with computers so I don't know what I am looking for when looking at these files. Is there anything in particular I should be seeking out? – Scott Nov 08 '11 at 20:02
  • All of of the lines containing "Fail" and the two lines preceding them, e.g. `grep -n -B2 Fail /var/log/pm-suspend.log`. The top line of each 3-line group usually ends with "success", and can be ignored. The remaining 2 lines show the script being invoked, and the error message (containing "Fail") that `grep` found. The `-B2` says "print 2 lines before match", `-n` says "show line numbers". Don't post your whole log! But carefully read the last few 3-line groups. – waltinator Nov 09 '11 at 21:54
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Try installing laptop-mode-tools, that has fixed the issue for me

Dirk Hartzer Waldeck
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