Hi, I can only shut down my pc from a root terminal with 'poweroff' (or shutdown) but not from graphical environments. >From Gnome2, sometimes it shuts down, sometimes I get back to gdm. From gdm, the shutdown action sometimes works, sometimes it just quits gdm. In KDE 4.7.4, shutdown in the application launcher menu does nothing, or dims the screen. How do I fix this? I do not see any error messages. Debian unstable, 3.1.0-1-686-pae thanks.