Binary package hint: gnome-power-manager
On upgrading from Feisty (amd64) last week I chose to de-activate power-manager as I use the distro on a desktop computer only.
A bug was already fixed (as I can read from community forums) at the beta stage concerning the problem of choosing not to install power-manager when prompted to enter the settings.
Now power manager is always installed but you can still mention the desktop-use only, which seems to have caused this bug:
> clicking the shutdown button causes a display freeze (mouse is still active though there are no longer active zones to click) for more than 30 sec. before the options panel is eventually displayed (I think the "light freeze" is simply caused by the unsynchronization of the mouse click and the action called for)
> when the option panel comes up it only displays 5 options, i.e. neither Stand-by nor Hibernate are proposed.
==> I went to the power-manager preferences and noticed an odd thing: no choice was registered in General/Notification zone whereas it requires a default choice.
Choosing always or never display an icon fixes the issue (update: not really)
Arrgh! Here we go again!
Issue is not fixed once and for all.
The first time in a session I click on the Red Button there's this 30+ sec. lag before power manager displays only 5 options (no standby or hibernate).
Cancelling to cancel the option panel: on subsequent tries all goes fine, 1/2 sec. lag and 7 options...
Sorry if my previous description was a bit fast on pointing out the possible causes. There also could be some kind of parameter conflict between X and Gnome.