Comment 12 for bug 226279

I have had the same problems on a Toshiba L30 10V.

Resume from suspend works perfectly with a vanilla 2.6.24.3, I've tried various different kernel options on the Ubuntu kernel source to no avail.
I believe the problem lies with one of the kernel patches applied by the Ubuntu team.

This is quite a serious issue and there is a thread on the forums about it:
http://ubuntuforums.org/showthread.php?p=4970453#post4970453