joel@Kim:~$ xrandr --newmode "1920x1080_50.00" 141.50 1920 2032 2232 2544 1080 1083 1088 1114 -hsync +vsync
xrandr: Failed to get size of gamma for output default
joel@Kim:~$ xrandr --addmode default 1920x1080_50.00
xrandr: Failed to get size of gamma for output default
joel@Kim:~$ xrandr --output default --mode 1920x1080_50.00
xrandr: Failed to get size of gamma for output default
xrandr: screen cannot be larger than 1024x768 (desired size 1920x1080)