configuration: two monitors are connected to VGA and DisplayPort to x220.
Issue: If I boot system with attached monitors, they works (because I set up 'init external graphic first' in the BIOS). If I plug monitors after laptop booting without them, only one can be activated.
When I trying to activate second monitor, I recieve:
xrandr: cannot find crtc for output DP1
(and that message is independed from selected mode).
Problem: x220 is not capable to serve two monitors AND LVDS (buildin screen).
xrandr --output VGA1 --auto
xrandr --output LVDS1 --off
xrandr --output DP1 --auto
xrandr --ouput DP1 --left-of VGA1