https://bugs.kde.org/show_bug.cgi?id=468315
Bug ID: 468315
Summary: Display Configuration incorrectly reads X11 as Wayland
and blocks unsupported (fake) display resolutions
Classification: Plasma
Product: kwin
Version: 5.27.4
Platform: Archlinux
OS: Linux
Status: REPORTED
Severity: minor
Priority: NOR
Component: platform-x11-standalone
Assignee: kwin-bugs-n...@kde.org
Reporter: kdeb...@kc1g.pw
Target Milestone: ---
SUMMARY
Display Configuration does not support weird resolutions on a non-standard
secondary display in X11 and claims it is in Wayland.
STEPS TO REPRODUCE
1. Launch X11 Plasma session with an unusual secondary display (e.g. an
800x1280 display masquerading as 1080x1920) over HDMI
2. `echo $XDG_SESSION_TYPE`: should return `x11`
3. Navigate to Display Configuration
OBSERVED RESULT
Note that Resolution is fixed at one value (no dropdown) with the note: "Using
unsupported resolutions was possible in the Plasma X11 session, but they were
never guaranteed to work and are not available in this Plasma Wayland session."
even though the current session is X11, not Wayland.
EXPECTED RESULT
Multiple resolution options available even though they may not be supported by
the display natively. Absence of a warning that "unsupported resolutions are
not supported in Wayland" in an X11 session.
SOFTWARE/OS VERSIONS
Operating System: Arch Linux
KDE Plasma Version: 5.27.4
KDE Frameworks Version: 5.104.0
Qt Version: 5.15.8
Kernel Version: 6.2.10-arch1-1 (64-bit)
Graphics Platform: X11
Processors: Intel® Core™ i5-8250U
ADDITIONAL INFORMATION
Linked KWin issue: https://invent.kde.org/plasma/kwin/-/issues/144
Similar issue reported (not shared on bugs.kde.org):
https://www.reddit.com/r/openSUSE/comments/u68bo3/154_plasma_fixed_at_low_res_thinks_im_on_wayland/
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