Comment 3 for bug 201936

I'm on Kubuntu12.10 amd64 using a Thinkpad T61p with the proprietary NVIDIA drivers.
I am willing to help debugging this, I am a developer myself so I can follow complex instructions.

Suspend works very well, but hibernation does not.

What does work is writing the hibernation file to disk and turning the device off.
What does NOT work is resuming from the hibernation file.

The kernel will print the screen which shows the progress of loading the hibernation data.
After it has finished, a blank screen will appear.

I tried using pm-hibernate from a text-mode terminal, i.e. I switched from the X server to the terminal with CTRL+ALT+F1.
After resuming from hibernation, I randomly pressed all keys on the keyboard and then tried to switch back to the terminal with CTRL+ALT+F1 which DID work.
What showed was that the pm-hibernate program had NOT exited yet, i.e. there was no terminal prompt after it.

Then I was able to switch to the other terminals, however they did hang after I typed the username and tried to enter the password.