The bug is also relevant to scaling. You can test it (assuming a 1920x1200 monitor) with the following example commands:
xrandr --fb 3840x2400 xrandr --output DVI-I-1 --scale 2x2
The example has no purpose as written, except to illustrate the bug, but similar "xrandr --scale" commands are useful if one wants to mirror a 1366x768 laptop screen and a 1920x1080 projector for a presentation.
The bug is also relevant to scaling. You can test it (assuming a 1920x1200 monitor) with the following example commands:
xrandr --fb 3840x2400
xrandr --output DVI-I-1 --scale 2x2
The example has no purpose as written, except to illustrate the bug, but similar "xrandr --scale" commands are useful if one wants to mirror a 1366x768 laptop screen and a 1920x1080 projector for a presentation.