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?
2 Answers
This usually happens when some process stops the system from being suspended.
Do
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
#!/bin/sh
(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.
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 it's not suspending.
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