https://bugs.kde.org/show_bug.cgi?id=455222
Bug ID: 455222
Summary: Exiting full-screen causes superfluous IDLE_NOTIFY
messages in XWayland
Product: kwin
Version: 5.24.5
Platform: Fedora RPMs
OS: Linux
Status: REPORTED
Severity: normal
Priority: NOR
Component: wayland-generic
Assignee: kwin-bugs-n...@kde.org
Reporter: pixelclus...@proton.me
Target Milestone: ---
See also https://gitlab.freedesktop.org/xorg/xserver/-/issues/1351:
I already filed an issue in the xserver repository, but after finding that I
could not reproduce this with other compositors I believe this is a KWin issue.
The issue shows for me when running Vulkan apps through RADV: If these Vulkan
apps are full-screen, and I switch to another window (e. g. using Alt+Tab),
these apps crash because RADV is triggering an assertion failure, which is
caused by some pixmaps receiving an IDLE_NOTIFY event more than once. AFAIK
windowing code is shared between RADV and anv, so I think this issue should be
reproducible with Intel cards as well.
STEPS TO REPRODUCE
1. Run any Vulkan application in X11 in full-screen (maximizing the window
isn't sufficient). Full-screen games using Proton/vkd3d exhibit the issue for
me.
2. Switch away from the full-screen app to another window using Alt+Tab.
OBSERVED RESULT
An assertion failure is triggered inside RADV's X11 presentation handling code,
making the Vulkan application crash.
EXPECTED RESULT
The application continues to run in the background.
SOFTWARE/OS VERSIONS
Linux/KDE Plasma: Fedora Linux 36 (kernel 5.17.13)
KDE Plasma Version: 5.24.5
KDE Frameworks Version: 5.93.0
Qt Version: 5.15.3
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