SUMMARY First of all, sorry if it's not the right product or component to report the bug. Please, move it where it fits better, if you know better. Today I discover that if I change the resolution from 1920x1200 (16:10) to 1920x1080 (16:9), when I change it back to the 16:10 one, there is a black region on the bottom. It is not just a render issue, because the mouse cannot move to it. It's hard to explain, but I hope you get the idea. Maybe I can add a video if it's not clear. I realized this by connecting my laptop to an external TV with HDMI, unifying output (then resolution changed automatically to a 16:9), and then removing the HDMI. First thing I noticed, is that laptop didn't revert to its native 16:10 resolution (should I open a different report for this?), which is a thing I would expect, but then I saw the main bug that I described above when I tried to select the right resolution manually. In any case, I can reproduce the main issue without attaching the laptop to an external monitor. STEPS TO REPRODUCE (I guess a laptop with a 16:10 aspect ratio screen is needed) 1. Go to System Settings -> Display and Monitor -> Display Configuration, select 1920x1980 (16:9) and apply. 2. Change back to 1920x1200 (16:10) and apply OBSERVED RESULT There is a black region on the bottom of the screen that shows nothing. Mouse also cannot pass to that region. EXPECTED RESULT Resolution changes successfully. SOFTWARE/OS VERSIONS Operating System: Arch Linux KDE Plasma Version: 5.23.3 KDE Frameworks Version: 5.88.0 Qt Version: 5.15.2 Kernel Version: 5.15.2-arch1-1 (64-bit) Graphics Platform: X11 Processors: 8 × 11th Gen Intel® Core™ i5-1135G7 @ 2.40GHz Memory: 15.4 GiB of RAM Graphics Processor: Mesa Intel® Xe Graphics
Seems like a KScreen problem.
After some more checking, I don't think this is a KScreen bug. Trying a fresh installed Plasma I couldn't reproduce this issue anymore, so I thought it was solved in Plasma 5.24, but after installing kded_rotation, I observed it again. So I opened a bug there: https://github.com/dos1/kded_rotation/issues/30 And I close this one here.