Suspend to RAM or switch to TTY bug on Dell C840 w/ NVidia video

[fra-dl-no-spam@tourde.org (François TOURDE)]

Hi all,

Using my laptop on AC power works fine, but when I try to play
unplugged, it's a nightmare.

- Closing the LID seems to lock the system

- Switching to a text TTY (CTRL+ALT+F1) lock the video, but I'm still
  able to use CTRL+ALT+DEL to shutdown (Never tried
  CTRL+ALT+BACKSPACE, but I will soon)

I'm using stock kernel 2.6.5, with NVidia video drivers.

Any idea?