Bug#630646: Also try if set to Ask

[Colin Turner]

Furthermore,

On my laptop where all power management was working correctly prior to 
the gnome-shell upgrade (running testing on this one):

* Pressing power essentially locks the computer with a flashing cursor

* Selecting "Ask" on the power settings produced the some dialog as 
previously mentioned by Martin.

* Selecting "Suspend" from the user menu also fails to suspend the computer.

Thanks for your work on this package,

CT.