Comment 76 for bug 1288572

Tim, I added "xrandr --output VGA-0 --off" to /sbin/prime-offload. lightdm resolution issue is fixed. but gdm and gnome-shell still have the same problems. gdm is flickering and fails to start. gnome-shell is a black (off) screen when login with lightdm. Maybe these problems are not related to my non-existent display?
PS: I tried the command "xrandr --output LVDS-1-0 --primary", it returns "X Error of failed request: BadMatch (invalid parameter attributes)" in terminal. Thus, I haven't tried to put it in the prime-offload yet.