https://bugs.kde.org/show_bug.cgi?id=489678
Bug ID: 489678
Summary: Telegram fails to redraw damaged screen regions
Classification: Plasma
Product: kwin
Version: 5.27.11
Platform: Debian testing
OS: Linux
Status: REPORTED
Severity: normal
Priority: NOR
Component: wayland-generic
Assignee: kwin-bugs-n...@kde.org
Reporter: ky...@yandex.ru
Target Milestone: ---
SUMMARY
Latest Telegram desktop client (5.2+) doesn't update damaged screen regions on
kwin-wayland. The bug was reported to Telegram developers and their reply was:
This means your compositor has a bugged implementation of damage tracking with
fractional scaling. I don't think disabling fractional scaling support or
partial damage support just because old distros have bugs is a good idea so I
think you should either switch to a distro with latest Plasma or report the bug
to kwin package via your distro bugtracker.
https://github.com/telegramdesktop/tdesktop/issues/28113#issuecomment-2203232661
STEPS TO REPRODUCE
1. Run latest Telegram desktop in Wayland session.
2. Scroll a chat or open any menu.
OBSERVED RESULT
Parts of Telegram window are not updated.
EXPECTED RESULT
Program window should be updated according to user interaction.
SOFTWARE/OS VERSIONS
Linux/KDE Plasma:
KDE Plasma Version: 5.27.11
KDE Frameworks Version: 5.115.0
Qt Version: 5.15.13
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