I just had the exact same problem.
I installed 12.04 LTS Desktop version on my laptop yesterday and managed to install all my apps and get everything working which took me over a day.
After installing hibernate in synaptic, I rebooted to set the power-options ( hibernate on closing the laptop lid ), but I never saw the light of Ubuntu's day again.
libcrypt version: 1.5.0 Could not stat the resume device file /dev/dm-0 Please type in the full path name to try again or press enter to boot the system
I have a working linux (suse 11.4) on my laptop which I can use to go through the Ubuntu installation on filesystem and possibly make minor changes, but have no clue how to fix this.
Any help would be appreciated.