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In the power management, I selected the option called "suspend when I close the lid". If I close the lid, the computer is not suspending. It keep itself on. How can I solve this problem? Thanks for the help

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Suspend problems are usually hardware related. Please give us some data on your computer. –  Javier Rivera Aug 17 '10 at 6:40
Note that suspend does not turn off the computer. It just puts itself into a lower power mode. Could you describe everything that happens when you click suspend from the shut down/log off/etc menu? –  dv3500ea Aug 17 '10 at 9:28
File a bug: ubuntu-bug –  maco Aug 17 '10 at 13:03
@Karthick, did you ever get this solved? Please update (or delete?) your question. –  Torben Gundtofte-Bruun Feb 18 '11 at 7:16

2 Answers 2

Does the computer suspend when you choose the suspend option instead of closing the lid?

Check the suspend logs at /var/log/pm-suspend.log

that might tell you why its not suspending.

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This usually happens when some process stops the system from being suspended.


dmesg -T|grep Freez -A4

and look for these entries:

[sun mar  3 15:19:48 2013] Freezing user space processes ... 
[sun mar  3 15:20:08 2013] Freezing of tasks failed after 20.01 seconds (3 tasks refusing to freeze, wq_busy=0):
[sun mar  3 15:20:08 2013] mount.nfs       D e8631aa0     0  5518   5517 0x00800004
[sun mar  3 15:20:08 2013]  e8631b10 00000086 f7bc0e00 e8631aa0 c1053cb4 c1809020 c192ee00 c192ee00

Check the time stamps to see which of the reported problems relate to your try to suspend. In this case, it is mount.nfs that is causeing the problems.

Now, put a script in /etc/pm/sleep.d/, scripts there will be run at suspend and resume. The file name should start with an ordering number, 00-49 for user scripts (for more details, see man pm-suspend).

The script could look like this

(killall -1 mount.nfs; exit 0)

with correpsonding entries for other processes that caused problems, if any.

Parenthesis and exit 0 is a trick: if the process isn't found, killall will exit with exit code 1, which will cancel the entire suspend. The above will run killall in a sub-shell that will exit with 0.

If you're having problems, check /var/log/pm-suspend.log that will log the attempt to suspend and to run your script.

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