Ubuntu hibernate resume fails: "PM: Resume from disk failed"

Question

I just upgraded to Ubuntu 10.4 from 9.10, and it's now hiding the hibernate and suspend options. How do I get them back?

So the way you do this is make sure that your swap partition is in /etc/fstab and swap is enabled, and big enough. Look at /proc/swaps to see if anything is listed.

Now I'm getting this error when I boot after suspending:

init: ureadahead-other main process (705) terminated with status 4

Does anyone know how to fix this?

I'm using Ubuntu with kernel 2.6.32-22-generic.

Answer 1

Make sure you have a resume= line in your /boot/grub/grub.cfg for grub2, or /boot/grub/menu.lst for grub.

You should have lines that say:

linux (blah blah blah) root/dev/$ROOT_PARTITION resume=/dev/$SWAP_PARTITION

Or if you're using UUIDs, obtained from running sudo blkid:

linux (blah blah blah) root=UUID=$UUID_ROOT_PARTITION resume=UUID=$UUID_SWAP_PARTITION

Where all words like $WHATEVER are either device nodes or partition UUIDs.

Answer 2

Can you see a battery / plug icon in the tray? If no, GNOME power manager is probably not running, so you need to start it / add it to the tray. If yes, does it show the hibernate option?

As a workaround, you can also suspend/hibernate from the CLI:

acpitool -s #suspend
acpitool -S #hibernate