Laptop Fails to Hibernate Correctly
Binary package hint: hibernate
My laptop does not hibernate correctly. It does suspend correctly.
a) Black screen for about 8 secs
b) Lots of random flikering on the screen for about 12 secs
c) PC then turns off
a) Grub screen appears
b) Followed by usual Ubuntu log in page
c) When logged in are in a fresh (nothing open) session
The system is a fresh install of 11.04, that involved re-partitioning the disk, so the swap partition was also created afresh. The encrypted /home partition option was selected.
Followed instructions at:
This mentioned an issue with encrypted swap space causing hibernation to fail. So following the instructions at: http://
I changed the swap partition over from encrypted to unencrypted. The old and new entries in the /etc/fstab are shown below:
#/dev/sda9 none swap sw 0 0
Is encrypted swap space still an issue with hibernation? Did I need to do this?
After changing to unencrypted swap the hibernation behaviour was still the same.
I then followed the instructions from:
Exactly the same behaviour as when hibernating from the graphical desktop
The I followed each of the three sets of tests. The first 2 tests in each set always ran and nothing seemed to apparently happen. However, in all three cases the third "echo disk . ..." test caused a brief blank screen and then lots of random flickering as before, but this time the laptop did not switch off. A hard power off button had to be used in each case. This meant that I could not follow the "dmesg > ..." command as requested.
What I then did was repeat the tests, but in each group after the second test I ran the "dmesg > ..." command and saved the file. I then ran the third test.
The instructions also said to "cat /sys/power/pm_test and cat /sys/power/disk", this was done and the results saved to files.
I will attach the various fails created to this ticket.
If I can run any other tests to help with this issue please post.
DistroRelease: Ubuntu 11.04
Package: hibernate (not installed)
Uname: Linux 2.6.38-8-generic i686
Date: Mon Jun 20 21:04:48 2011
InstallationMedia: Ubuntu 11.04 "Natty Narwhal" - Release i386 (20110427.1)
UpgradeStatus: No upgrade log present (probably fresh install)