xrandr: Failed to get size of gamma for output default Screen 0: minimum 2560 x 1080, current 2560 x 1080, maximum 2560 x 1080 default connected 2560x1080+0+0 (0x520) normal (normal) 0mm x 0mm Identifier: 0x51f Timestamp: 106022 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 2560x1080 (0x520) 0.000MHz *current h: width 2560 start 0 end 0 total 2560 skew 0 clock 0.00KHz v: height 1080 start 0 end 0 total 1080 clock 0.00Hz