computer doesn't hibernate

Thank you for taking the time to report this bug and helping to make Ubuntu better. Unfortunately we can't fix it, because your description didn't include enough information. You may find it helpful to read "How to report bugs effectively" [WWW] http://www.chiark.greenend.org.uk/~sgtatham/bugs.html. We'd be grateful if you would then provide a more complete description of the problem.

We have instructions on debugging some types of problems. [WWW] http://wiki.ubuntu.com/DebuggingProcedures

At a minimum, we need:
1. the specific steps or actions you took that caused you to encounter the problem,
2. the behavior you expected, and
3. the behavior you actually encountered (in as much detail as possible).
Thanks!

Sometimes, the machine does not hibernate when Firefox is running. After I select "Hibernate" option, the screen goes blank, my laptop's (Thinkpad T60p) sleep indicator blinks, I see some random text on the screen (not X screen). After a while, sleep indicator switches off and the computer starts running as usual. If I quit or kill Firefox and try again, hibernate works fine.

I run Kubuntu Gutsy. Firefox version 2.0.0.10.

Thanks!

I could see these lines in /var/log/syslog when this happens:
        swsusp: Not enough free memory
        Error -12 suspending

Maybe this is not really a bug?

How much swap space do you have available? You can check using the command 'free' in a terminal. Thanks again!

We are closing this bug report as it lacks the information, described in the previous comments, we need to investigate the problem further. However, please reopen it if you can give us the missing information and feel free to submit bug reports in the future.

Sorry for a very late update. Today I faced the same issue again. Here is the output of 'free':

$ free
             total used free shared buffers cached
Mem: 1034380 502044 532336 0 2476 144716
-/+ buffers/cache: 354852 679528
Swap: 2097136 48340 2048796

I could see the following lines in my syslog:

Mar 10 08:28:06 localhost kernel: [22793.956000] swsusp: critical section:
Mar 10 08:28:06 localhost kernel: [22793.956000] swsusp: Need to copy 130764 pages
Mar 10 08:28:06 localhost kernel: [22793.956000] swsusp: Normal pages needed: 114560 + 1024 + 24, available pages: 114870
Mar 10 08:28:06 localhost kernel: [22793.956000] swsusp: Not enough free memory
Mar 10 08:28:06 localhost kernel: [22793.956000] Error -12 suspending

Beginning with the Hardy Heron 8.04 development cycle, all open Ubuntu kernel bugs need to be reported against the "linux" kernel package. We are automatically migrating this bug to the new "linux" package. However, development has already began for the upcoming Intrepid Ibex 8.10 release. It would be helpful if you could test the upcoming release and verify if this is still an issue - http://www.ubuntu.com/testing . If the issue still exists, please update this report by changing the Status of the "linux" task from "Incomplete" to "New". We appreciate your patience and understanding as we make this transition. Thanks!

The Ubuntu Kernel Team is planning to move to the 2.6.27 kernel for the upcoming Intrepid Ibex 8.10 release. As a result, the kernel team would appreciate it if you could please test this newer 2.6.27 Ubuntu kernel. There are one of two ways you should be able to test:

1) If you are comfortable installing packages on your own, the linux-image-2.6.27-* package is currently available for you to install and test.

--or--

2) The upcoming Alpha5 for Intrepid Ibex 8.10 will contain this newer 2.6.27 Ubuntu kernel. Alpha5 is set to be released Thursday Sept 4. Please watch http://www.ubuntu.com/testing for Alpha5 to be announced. You should then be able to test via a LiveCD.

Please let us know immediately if this newer 2.6.27 kernel resolves the bug reported here or if the issue remains. More importantly, please open a new bug report for each new bug/regression introduced by the 2.6.27 kernel and tag the bug report with 'linux-2.6.27'. Also, please specifically note if the issue does or does not appear in the 2.6.26 kernel. Thanks again, we really appreicate your help and feedback.

We are closing this bug report because it lacks the information we need to investigate the problem, as described in the previous comments. Please reopen it if you can give us the missing information, and don't hesitate to submit bug reports in the future. To reopen the bug report you can click on the current status, under the Status column, and change the Status back to "New". Thanks again!