RE: Precision M4800 : Input lag at log in, Switchable graphics not functioning, GPU fan "chirping" when it starts up.
I fell your pain !!!
Yesterday I received my laptop and I'm not very happy right now as a was when buying.
My action taken so far -
Install drivers one by one
Run all possible diagnostic software
Install AMD drivers from website and dell website
When I connect external monitor thrugh hdmi all problems are gone!!!
When I set booth screens viable all ok!!
When I set to see only laptop screen but still have external monitor connected is also ok!!
Even when I have hdmi plugged to laptop and its not plug to monitor everything, is ok!!
I would appreciate if someone can help
I'm seriously angry, that is professional workstation and things like that should be happening