Originally asked here.

I have a 1920x1200 monitor, and have some situations where I want to force the output to the more common 1920x1080. However, I don't want to distort the output, and would prefer a "cropping" black bar at the bottom.

I'm not sure if xrandr fb and transform is the best way to do this, but I cannot understand how transform works. Is this approach suitable for my case, and if so, what command would I use?

I also tried fb without transform:

Code: Select all

 xrandr --output DP1 --mode 1920x1200 --fb 1920x1080

However, this caused quite a few issues. At first, it seemed to work well, with a black bar at the bottom, and my mouse contrained to the cropped area. However, the panel at the bottom of the screen was missing. Then, after alt-tabbing, my windows become vertically squashed, and my mouse-clicks correspond to different (unsquashed) positions.

Kubuntu 13.10
KDE 4.12.3