
Restarting your window manager with the setting might work. My suspicion is that the XRandR and root window events are not being picked up (surprising in the year 2022). I could drag windows down to the other area and still kind of use it. I tried it with LXDE and it also wasn’t black, but the pop-up menu was only appearing in the top area and not under the mouse cursor. Unfortunately the handling of the pop-up menu is broken in WMaker and it just shoots off screen whenever I try to move over the menu items. It was nice enough to repeat my desktop background over the entire framebuffer. I didn’t see a black area, but one difference is I’m using a different window manager (Window Maker).


I played with a few variations on an RPI-CM3 DevTerm but really it should work the same with anything using this kind of panel.
