I have a laptop - Clevo P150EM, with two graphic cards onboard. Intel HD Graphics 4000 and a Radeon HD 8970M.
I would like to check which one is used, and ensure that the Intel HD 4000 is used as a main card, and use the Radeon HD 8970M only for gaming. Any suggestions anyone? ;)
xrandr
? 'man xrandr' will provide the manual page for it. It looks like it's what you are looking for. Let us know. – Elder Geek Feb 19 '15 at 21:58