https://bugs.kde.org/show_bug.cgi?id=480828
Bug ID: 480828
Summary: kwin: poor experience with Gtk apps and 175% display
scaling
Classification: Plasma
Product: kwin
Version: 5.27.10
Platform: Other
OS: Linux
Status: REPORTED
Severity: normal
Priority: NOR
Component: wayland-generic
Assignee: kwin-bugs-n...@kde.org
Reporter: anars...@gmail.com
Target Milestone: ---
Created attachment 165522
--> https://bugs.kde.org/attachment.cgi?id=165522&action=edit
kwin_175percent_scaling_1_dpi_172032.png
SUMMARY
When display scaling is set to 175%, kwin communicates scaling factor of 1 to
Gtk apps and sets Gdk/UnscaledDPI in xsettingsd config to 172032. That results
in properly sized text, but small widgets, as a result text doesn't fit into
buttons, menus, dropdown selections, etc.
It works much better I force scaling factor to 2 and set Gdk/UnscaledDpi to
86016
I believe that kwin should properly round fractional scaling factors instead of
flooring it.
See attached screenshots as example.
STEPS TO REPRODUCE
1. Set display scaling to 175%
2. Open any Gtk3 app (e.g. Orca Slicer)
OBSERVED RESULT
Text doesn't fit widgets, since text is scaled, but widgets are not
EXPECTED RESULT
Text should fit widgets
SOFTWARE/OS VERSIONS
Windows:
macOS:
Linux/KDE Plasma: Archlinux, plasma 5.27.10
(available in About System)
KDE Plasma Version: 5.27.10
KDE Frameworks Version: 5.114.0
Qt Version: 5.15.12
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