https://bugs.kde.org/show_bug.cgi?id=420039
Bug ID: 420039
Summary: kwin_wayland: Windows are often invisible and
unusable, triggers session crash
Product: kwin
Version: unspecified
Platform: Other
OS: Linux
Status: REPORTED
Severity: major
Priority: NOR
Component: wayland-generic
Assignee: kwin-bugs-n...@kde.org
Reporter: sonichedgehog_hyperblas...@yahoo.com
Target Milestone: ---
When opening any new window (application, dialog, menu, etc) the window will
often never appear and remains in an invisible state. Its process does however
exist and is fully responsive. KWin seems to think it's there too, however
Plasma doesn't show it in the task manager and alt-tab switching selects
something non-existent... for example the drawing and selection order of
windows completely breaks when an unrendered dialog is present. If attempting
to switch desktops during this time, the session will crash and you're taken
back to the login screen: Only way to "disarm" such crashes is to kill the
process behind such a window (eg: from KSysGuard)... attempting to open the
application again will usually work, though it may take several tries before
the window will spawn properly. This issue renders the Plasma Wayland session
next to unusable and requires constant user attention to work around hidden
windows.
I tried several things which don't seem to prevent the problem: First was a
suggestion to boot with the amdgpu.dc=0 parameter which did not affect the
issue. I attempted different combinations under System Settings - Hardware -
Display and Monitor - Compositor, the scale method / render backend (OpenGL 2.0
or 3.1) / vsync didn't affect it either. I also played with some parameters
under the Compositing section of ~/.config/kwinrc but couldn't find proper
documentation on what each one does and what in there might help.
Linux openSUSE Tumbleweed x64. Plasma 5.18.4. Mesa 20.0.4. Wayland 1.18 / 1.20.
KWayland 5.68. AMD Radeon (TM) R9 390 Series (HAWAII, DRM 3.36.0,
5.6.2-1-default, LLVM 10.0.0). KWin theme is Aurorae, themes in use include:
https://www.pling.com/p/1002663
https://www.pling.com/p/998653
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