Following my previous comment, I have downloaded the source package for gnome-power-manager, compiled with --enable-debug=yes.
Now, when I press the power button it outputs the following: (gnome-power-manager:3857): GnomeUI-CRITICAL **: gnome_client_request_save: assertion `client != NULL' failed So it seems that the culprit is that gnome_master_client () is returning NULL. -- regression: pressing power button no longer brings up logout dialog https://bugs.launchpad.net/bugs/57872 You received this bug notification because you are a member of Ubuntu Desktop Bugs, which is subscribed to gnome-power-manager in ubuntu. -- desktop-bugs mailing list desktop-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/desktop-bugs