This is from man page of randr: Per-output options [--panning widthxheight[+x+y[/track_widthx‐ track_height+track_x+track_y[/border_left/border_top/border_right/bor‐ der_bottom]]]] So i guess that the panning option expect more arguments. I will test here and send my experiences (after lunch).Just a tip: I think the better gui tool for xrandr is ARandR, better than grandr, krandr, lxrandr, etc. It even saves your setups in ~/.screenlayout/$MODE.sh