https://bugs.kde.org/show_bug.cgi?id=510700
Bug ID: 510700
Summary: Windows flicker after switching virtual desktops
Classification: Plasma
Product: kwin
Version First 6.4.5
Reported In:
Platform: openSUSE
OS: Linux
Status: REPORTED
Severity: normal
Priority: NOR
Component: effects-window-management
Assignee: [email protected]
Reporter: [email protected]
Target Milestone: ---
SUMMARY
Using pager to change virtual desktops makes windows flicker and disappear on
primary display (built-in).
STEPS TO REPRODUCE
1. Open a window on built-in screen (primary)
2. Use pager to change from current virtual desktop
a. to another one, then back to the current (where the other desktop does not
show the window), or
b. to another one that shows the window
3. Notice window flickering to all or partly transparent.
4. Click the flickering window
5. Flickering stops
OBSERVED RESULT
* Windows flicker and disappear or partially disappear or show the desktop
'through' the window. Artifacts from other windows on the same display may
appear in the window instead of the correct window contents.
* Clicking the window stop s the flickering and returns the window to normal.
EXPECTED RESULT
Windows are displayed correctly on the assigned virtual desktops
SOFTWARE/OS VERSIONS
Operating System: openSUSE Tumbleweed 20251013
KDE Plasma Version: 6.4.5
KDE Frameworks Version: 6.19.0
Qt Version: 6.10.0
Kernel Version: 6.17.1-1-default (64-bit)
Graphics Platform: Wayland
Graphics Processor 1: Intel® UHD Graphics 620
Graphics Processor 2: NVIDIA GeForce MX150
ADDITIONAL INFORMATION
* The issue does not happen on the second display (external)
* Changing screen scaling appears to have no effect.
* Disabling transparency appears to have no effect.
* Setting the window to appear on all virtual desktops may stop the flickering.
* The issue started after an operating system update that included Nvidia
drivers
* I have not tested yet with Intel graphics or an X11 session.
Similar issues:
https://bugs.kde.org/show_bug.cgi?id=494156
https://bugs.kde.org/show_bug.cgi?id=509429
https://bugs.kde.org/show_bug.cgi?id=504016
> inxi -G
```
Graphics:
Device-1: Intel UHD Graphics 620 driver: i915 v: kernel
Device-2: NVIDIA GP108M [GeForce MX150] driver: nvidia v: 580.95.05
Device-3: Suyin HP TrueVision FHD RGB-IR driver: uvcvideo type: USB
Display: wayland server: X.org v: 1.21.1.15 with: Xwayland v: 24.1.8
compositor: kwin_wayland driver: X: loaded: modesetting,nvidia dri: iris
gpu: i915 resolution: 1: 3840x2160~60Hz 2: 3840x2160~60Hz
API: EGL v: 1.5 drivers: iris,nvidia,swrast
platforms: gbm,wayland,x11,surfaceless,device
API: OpenGL v: 4.6.0 compat-v: 4.5 vendor: intel mesa v: 25.2.4
renderer: Mesa Intel UHD Graphics 620 (KBL GT2)
API: Vulkan v: 1.4.328 drivers: intel,nvidia,llvmpipe surfaces: N/A
Info: Tools: api: clinfo, eglinfo, glxinfo, vulkaninfo
de: kscreen-console,kscreen-doctor gpu: nvidia-smi wl: wayland-info
x11: xdpyinfo, xprop, xrandr
```
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