https://bugs.kde.org/show_bug.cgi?id=445628
Bug ID: 445628
Summary: Changing screen resolution on laptop leaves black
region
Product: kwin
Version: 5.23.3
Platform: Other
OS: Linux
Status: REPORTED
Severity: normal
Priority: NOR
Component: general
Assignee: kwin-bugs-n...@kde.org
Reporter: m...@iyanmv.com
Target Milestone: ---
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
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