https://bugs.kde.org/show_bug.cgi?id=433545
Bug ID: 433545
Summary: Resolution too small after applying scaling on HiDPI
screen on Wayland
Product: kwin
Version: 5.21.0
Platform: Archlinux Packages
OS: Linux
Status: REPORTED
Severity: major
Priority: NOR
Component: wayland-generic
Assignee: kwin-bugs-n...@kde.org
Reporter: j...@iki.fi
Target Milestone: ---
Created attachment 136118
--> https://bugs.kde.org/attachment.cgi?id=136118&action=edit
Screen shot of the Display Configuration panel.
SUMMARY
I have a laptop with a 14" HiDPI screen (2160x1440) on which I want to apply
scaling. However, since Plasma 5.21 the scaling is apparently implemented by
lowering the actual screen resolution, which results in a blurred screen.
STEPS TO REPRODUCE
1. Open Display Configuration in Display Settings
2. Use the Scale slider to set scaling to 125%
3. Click Apply
OBSERVED RESULT
Everything on the screen is scaled up, but it is done at the expense of
clarity. The whole screen looks blurred, not just some applications, but all
applications. The picture of the screen in the settings dialog says "Laptop
screen (1728x1152)" instead of "2160x1440". The Resolution drop-down menu says
"2160x1440 (3:2)" as it should.
Only Wayland is affected. Scaling works OK in X11.
EXPECTED RESULT
The expected result is that the text and screen elements would be scaled by
125% and look as crisp as before. This worked perfectly before Plasma 5.21.0.
SOFTWARE/OS VERSIONS
Windows:
macOS:
Linux/KDE Plasma: Arch Linux
(available in About System)
KDE Plasma Version: 5.21.1
KDE Frameworks Version: 5.79.0
Qt Version: 5.15.2
ADDITIONAL INFORMATION
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