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After upgrading Ubuntu from 10.10 to 11.10 (though 11.04) the hibernation fails once in a while.

With 10.10 I used uswsusp - it does not work at all on 11.10 (uninstalled) so I use ordinary swsusp. The ordinary hibernation fails to start once in a while:

  • Sometimes starts clearly after hibernation without problems
  • Sometimes I get kernel panic
  • Sometimes it just reboots itself.
  • Happens with Unity, Gnome, XFCE and KDE.
  • The behavior is not consistent

Any ideas how can it be fixed or at least properly debugged?

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Did you try to update the BIOS downloading the update from lenovo's website? –  fain182 Dec 10 '11 at 10:27
    
No, I didn't. Does this update known to solve this problem? –  Artyom Dec 11 '11 at 9:16

2 Answers 2

You could start debugging by looking at /var/log/pm-*.log and the scripts in the pm-utils package (dpkg -l pm-utils). "pm" stands for Power Management, and is invoked for each hibernate/wake/suspend/resume. Do you have encrypted swap? suspend/resume has trouble with that.

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I had awarded the bounty to prevent from it being wasted, and because it was the only answer and it was reasonable (even thou obvious) –  Artyom Dec 13 '11 at 22:29

watch out with swsusp!!

...

"* If you touch anything on disk between suspend and resume... 
*...kiss your data goodbye.
* If you do resume from initrd after your filesystems are mounted...
*...bye bye root partition. 

...

from: http://www.mjmwired.net/kernel/Documentation/power/swsusp.txt

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