xrandr: Failed to get size of gamma for output default Screen 0: minimum 640 x 480, current 1024 x 768, maximum 1024 x 768 default connected 1024x768+0+0 (0x55) normal (normal) 0mm x 0mm Identifier: 0x54 Timestamp: 26452 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: non-desktop: 0 supported: 0, 1 1024x768 (0x55) 0.000MHz *current h: width 1024 start 0 end 0 total 1024 skew 0 clock 0.00KHz v: height 768 start 0 end 0 total 768 clock 0.00Hz 800x600 (0x56) 0.000MHz 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 (0x57) 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