xrandr: Failed to get size of gamma for output default Screen 0: minimum 640 x 480, current 800 x 600, maximum 800 x 600 default connected primary 800x600+0+0 (0x26d) normal (normal) 0mm x 0mm Identifier: 0x26c Timestamp: 19487 Subpixel: unknown Clones: CRTC: 0 CRTCs: 0 Transform: 1.000000 0.000000 0.000000 0.000000 1.000000 0.000000 0.000000 0.000000 1.000000 filter: 800x600 (0x26d) 0.000MHz *current h: width 800 start 0 end 0 total 800 skew 0 clock 0.00KHz v: height 600 start 0 end 0 total 600 clock 0.00Hz 640x480 (0x26e) 0.000MHz h: width 640 start 0 end 0 total 640 skew 0 clock 0.00KHz v: height 480 start 0 end 0 total 480 clock 0.00Hz