In LUCID, similar message does appear when trying to fill a bug using ubuntu-bug from a terminal, regarding gnome-power-preferences, as follows:
~$ ubuntu-bug gnome-power-preferences
Gtk-Message: Failed to load module "pk-gtk-module": libpk-gtk-module.so: no se puede abrír el archivo de objeto compartido: No existe el fichero ó directorio
The bug I found it's that the whole SYSTEM FREEZES when I try to adjust screen brightness by dragging the slider at gnome-power-preferences in System > Preferences.
Also I can't adjust the brightness of the monitor by the brightness applet.
In LUCID, similar message does appear when trying to fill a bug using ubuntu-bug from a terminal, regarding gnome-power- preferences, as follows:
~$ ubuntu-bug gnome-power- preferences module. so: no se puede abrír el archivo de objeto compartido: No existe el fichero ó directorio
Gtk-Message: Failed to load module "pk-gtk-module": libpk-gtk-
The bug I found it's that the whole SYSTEM FREEZES when I try to adjust screen brightness by dragging the slider at gnome-power- preferences in System > Preferences.
Also I can't adjust the brightness of the monitor by the brightness applet.
Possible related bugs: Bug #535097 Bug #572226