Everything was correct installed (drivers etc), well, yesterday I turned off my pc normally and today when I started the pc, my main monitor (nvidia gtx 660) was not working anymore but secondary gpu (intel hd graphics 630) does. Its not any power or physic problem, xrandr not detect more my main monitor connected with pce gpu (gtx660).
I am very beginner at Linux and I do not have any idea why it just break.
Things I tried: Reinstalled xorg, changed to only main pce gpu (bios hardware config).
I tried find the xorg.conf in X11 but there is no xorg file there, I did not nothing yesterday... hhu