my laptop's screen broke lately and I've got about 168px column
on left unusable, this xrandr command seems to work, ie it crops
screen to working area
xrandr --fb 1432x900 --output eDP1 --auto --transform 1,0,-168,0,1,0,0,0,1
but dwm renders on full width of screen (1600x900), so root and
other windows sticks outside of screen even though xserver don't
allow mouse pointer to escape past right edge of screen.
shouldn't dwm be rendered to size of framebuffer or am I using
xrandr the wrong way?