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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.

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up vote 1 down vote accepted

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.

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thanks much. I'd only been searching for that bit of magic for a month ;) – msw Jun 18 '10 at 7:40
I asked the grub developers and they said it has nothing to do with the bootloader. Go figure. – Neil Jun 19 '10 at 2:19

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
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pm-hibernate #--help for options ||| pm-suspend #--help for options – Shiki May 21 '10 at 8:32
does acpitool work for shutdown as well? – Dom May 21 '10 at 10:03
@Dom: No. That's what shutdown is for :-) (most modern Linux distros also have poweroff). – sleske May 21 '10 at 12:02
Oops! Thanks, didn't know those. – Dom May 24 '10 at 7:30

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