Downsampling With Linux

October 29, 2013

xrandr for a list of resolutions & refresh rates

xrandr
Screen 0: minimum 320 x 200, current 1366 x 768, maximum 32767 x 32767
LVDS1 connected 1366x768+0+0 (normal left inverted right x axis y axis) 256mm x 144mm
   1366x768       60.0*+
   1024x768       60.0  
   800x600        60.3     56.2  
   640x480        59.9  
VGA1 disconnected (normal left inverted right x axis y axis)
HDMI1 disconnected (normal left inverted right x axis y axis)
DP1 disconnected (normal left inverted right x axis y axis)

So here is an example to downsample from 4k to 1366x768 (native). See "man xrandr" for an explanation of xrandr and its options. This works with Nvida Optimus (bumblebee) & Steam (tested)

xrandr --fb 4098x2304 --output LVDS1 --scale 3x3 --panning 4098x2304

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