xrandr
Screen 0: minimum 320 x 240, current 400 x 300, maximum 1024 x 768 default connected 400x300+0+0 0mm x 0mm 1024x768 60.0 800x600 60.0 56.0 640x480 60.0 640x384 60.0 576x384 55.0 512x384 60.0 400x300 60.0* 56.0 320x240 60.0
xrandr
Screen 0: minimum 320 x 240, current 400 x 300, maximum 1024 x 768
default connected 400x300+0+0 0mm x 0mm
1024x768 60.0
800x600 60.0 56.0
640x480 60.0
640x384 60.0
576x384 55.0
512x384 60.0
400x300 60.0* 56.0
320x240 60.0