xrandr -q
Failed to get size of gamma for output default Screen 0: minimum 800 x 600, current 800 x 600, maximum 800 x 600 default connected 800x600+0+0 0mm x 0mm 800x600 0.0*

Tried adding the mode "1024x600_60.00" 49.00 1024 1072 1168 1312 600 603 613 624 -hsync +vsync"

but when doing xrandr -output default 1024x600_60.00
it gave the "Failed to get size of gamma for output default" and did nothing.