Comment 33 for bug 44058

Oded, I believe tekstr is right - you can't suspend because GPM is not properly assigning the gconf values for the power management actions. The author of GPM is currently working on it here:
http://bugzilla.gnome.org/show_bug.cgi?id=590991

Once this is done we can work on the inhibit bug (btw, I was testing the inhibit applet on a desktop - when the inhibit applet is"inhibiting" it will stop all power management actions based on timers - but if you choose "shutdown" or "hibernate" from GPM, it will still shutdown or hibernate)