My Ubuntu 12.04 suddenly stopped to auto-lock after X minutes. It doesn't matter how long I leave the computer idle, it NEVER turns the screen off and never locks the screen either.
I am using Gnome-shell. Under the
Brightness and Lock menu, I have marked:
- Dim screen to save power
- Turn screen off when idle for 5 minutes
- Lock screen after 5 minutes
I have already re-installed gnome-screensaver (no effect). Any ideas?