Confirmed, this did fix my problem, Thanks Luka.
Only change is my machine is an nx series not nw eg added ;nx8420 to /usr/share/hal/fdi/information/10freedesktop/20-video-quirk-pm-hp.fdi and it solved my problem.
Confirmed, this did fix my problem, Thanks Luka.
Only change is my machine is an nx series not nw eg added ;nx8420 to /usr/share/ hal/fdi/ information/ 10freedesktop/ 20-video- quirk-pm- hp.fdi and it solved my problem.