From a terminal, could you please do
killall gnome-power-manager gnome-power-manager --verbose --no-daemon
and wait for it to finish printing output, then hit the brightness key and attach whatever it outputs?
From a terminal, could you please do
killall gnome-power-manager
gnome-power-manager --verbose --no-daemon
and wait for it to finish printing output, then hit the brightness key and attach whatever it outputs?