Comment 3 for bug 389857

Thanks for looking into the upstream report. In order to debug further, there are some additional information we can collect:

GNOME Power Manager Verbose Trace (This will turn on verbose debugging for GNOME Power Manager.):
1) enter the following into the terminal:
killall gnome-power-manager
gnome-power-manager --no-daemon --verbose
2) try the inhibit applet and post the output from the terminal

Reason (/var/log/messages) information (This will return the reason GNOME Power Manager did a specific action.)
1) Try the inhibit applet
2) enter the following into the terminal:
cat /var/log/message | grep gnome-power-manager
3) post the output from the terminal

HAL Verbose Trace
1) enter the following into the terminal:
/usr/sbin/hald --daemon=no --verbose=yes --retain-privileges
2) try the inhibit applet and post the output from the terminal