Comment 1 for bug 347624

this is probably a problem with the swap uuid not being correct in fstab and resume. the following fix worked for me:

open terminal and run code:
sudo blkid

then copy the swap uuid without the quotes
 run code:
gksu gedit /etc/fstab
paste the correct uuid into fstab (be sure it is the swap file uuid)
save and close gedit

then run code:
gksu gedit /etc/initramfs-tools/conf.d/resume
again, copy the correct swap uuid, save and close gedit

add the resume call if you dont have it in place

finally run code:
sudo update-initramfs -u

it should work when you reboot--at least it did for me