This only started happening with gnome-power-manager 2.31.90-0ubuntu3
released today. The previous version didn't have this happen. The bug
fix for [Bug 614039] Re: gnome-power-manager crashed with signal 5 in
_XError() seems to have caused this possibly. gnome-power-manager
stopped crashing but no
is it possible the fix for this created this problem [Bug 623000]
Authentication is needed to run '/usr/sbin/gnome-power-backlight-helper' as the
super user when using "Reduce backlight brightness" or "Dim display when idle"
options.? the crash stopped but now have that bug present.
--
gnome-p