How do I resolve "xrandr: cannot find crtc for output"?
This occurs becaues you have another screen already active, in this case DP2
. DP2
here is a monitor running off of a DisplayPort. The laptop is a Lenovo x230 and it was booted with an Ultrabase 3 docking station.
You can resolve this issue by simply turning off the screen using,
xrandr --output DP2 --off
Now, in XFCE or similar workstation you should see your desktop area shrink. Then you can continue running your xrandr
commands as you normally would,
xrandr --auto
xrandr ...