How to extend display to the secondary monitor without logout at Gnome/Kde
First of all, we will see which outputs are available, connected/disconnected with xrandr –verbose command:
black@sysbuntu:~$ xrandr –verbose
Screen 0: minimum 320 x 200, current 1280 x 800, maximum 2720 x 900
LVDS connected 1280×800+0+0 (0×4f) normal (normal left inverted right x axis y axis) 0mm x 0mm
Identifier: 0×4b
Timestamp: 12612
Subpixel: horizontal rgb
Clones:
CRTC: [...]
