Comment 130 for bug 160264

I too exhibit this issue. I run an Nvidia card in a Dell Vostro 1400.

A bit more info of my testing:

-I've tried to Restricted Nvidia drivers and the EnvyNG 173.14.12 drivers with no difference.
-If I manually kill compiz prior to Suspend I have a higher probability (1/2) of getting a normal wake-up with password field.
-If I leave compiz running prior to Suspend I have a lower probability (~1/20) of getting a normal wake-up.
-There is no difference between closing the lid and manually selecting shutdown & suspend.

Extraneous facts:
-Compiz will randomly crash while rotating screens, a manual restart works properly.
-Restarting X (gnome) with CTRL-ALT-Backspace increases the frequency of Compiz freezing.
-Upon wake up from Suspend, the taskbar is always frozen. My work around is opening Tomboy (which loads a taskbar icon) and then close it, after that the taskbar returns to normal operation.

Hopefully this helps someone, I am very willing to do testing if anyone would like to guide me.