KDE Plasma Wayland glitch on floating menus interface

[leosmi]

This happens in every floating menu, in every video drive Vulkan or not, dark mode or not, anki or native style.
The glitch disappears hovering over it, only one option at time, but all the glitch returns when floating menu is hidden.

Anki Version: ⁨26.09.2 (bb0dd6d1)⁩
Python 3.13.15 Qt 6.11.2 Chromium 140

OS: Linux Mint 22.3 x86_64
Host: Aspire A514-54 V1.34
Kernel: 7.0.0-31-generic
Uptime: 4 hours, 20 mins
Packages: 3456 (dpkg), 21 (flatpak)
Shell: bash 5.2.21
Resolution: 1920x1080
DE: Plasma 5.27.12
WM: kwin
Theme: [Plasma], Breeze [GTK2/3]
Icons: [Plasma], Slot-Dark-Icons [GTK2/3]
Terminal: konsole
CPU: 11th Gen Intel i5-1135G7 (8) @ 4.200GHz
GPU: Intel TigerLake-LP GT2 [Iris Xe Graphics]

Sorry, I can’t find if there’s a similar topic about it.

[abdo]

Can you post console output? Can you reproduce this with no add-ons? Troubleshooting - Anki Manual

@A_Blokee this looks similar to your report: Artifacting in webview with addons enabled and software driver · Issue #5638 · ankitects/anki · GitHub

[leosmi]

I have no addons already

while resiziing the console window the glitch happens

[abdo]

Please run Anki from the terminal and copy & paste the output.

[leosmi]

Starting Anki 26.09.2...
2026-09-22 16:06:42,868:INFO:aqt.mediasrv: Serving on http://127.0.0.1:45007
Qt debug: vkDebug: loader_create_device_chain: Failed to find 'vkGetInstanceProcAddr' in layer "/home/leandro/.local/share/vulkan/implicit_layer.d/../../../lib/liblsfg-vk-layer.so".  Skipping layer. 
Starting main loop...
mpv not found, reverting to mplayer
Qt debug: vkDebug: loader_create_device_chain: Failed to find 'vkGetInstanceProcAddr' in layer "/home/leandro/.local/share/vulkan/implicit_layer.d/../../../lib/liblsfg-vk-layer.so".  Skipping layer. 
Qt debug: Compositor returned null texture 
Qt debug: Compositor returned null texture 

in safe mode:

Starting Anki 26.09.2...
2026-09-22 16:08:51,051:INFO:aqt.mediasrv: Serving on ``http://127.0.0.1:37697
Qt debug: vkDebug: loader_create_device_chain: Failed to find 'vkGetInstanceProcAddr' in layer "/home/leandro/.local/share/vulkan/implicit_layer.d/../../../lib/liblsfg-vk-layer.so". Skipping layer.
Qt debug: vkDebug: loader_create_device_chain: Failed to find 'vkGetInstanceProcAddr' in layer "/home/leandro/.local/share/vulkan/implicit_layer.d/../../../lib/liblsfg-vk-layer.so". Skipping layer.
Qt warning: Failed to create popup. Ensure popup QWidgetWindow(0x5591e7ce89b0, name="CustomLabelClassWindow") has a transientParent set.
Starting main loop...
mpv not found, reverting to mplayer

[A_Blokee]

Could you check if updating your system packages solves this issue? My bug seems to have gone away at least for now.

[leosmi]

Not working, actually worked once and then no more, even after rebooting.

[abdo]

You might have more luck with the Flatpak package if you have Flatpak installed: https://flathub.org/en/apps/net.ankiweb.Anki

flatpak install net.ankiweb.Anki

[leosmi]

did not work

[abdo]

Does running Anki with QT_QPA_PLATFORM=xcb anki help?

[leosmi]

@abdo

QT_QPA_PLATFORM=xcb anki

Yes, it works, the glitch in this mode are gone:

Starting Anki 26.09.2...
2026-09-26 00:28:16,511:INFO:aqt.mediasrv: Serving on http:/127.0.0.1:39301
Qt debug: vkDebug: loader_create_device_chain: Failed to find 'vkGetInstanceProcAddr' in layer "/home/leandro/.local/share/vulkan/implicit_layer.d/../../../lib/liblsfg-vk-layer.so". Skipping layer.
Starting main loop...
mpv not found, reverting to mplayer
Qt debug: vkDebug: loader_create_device_chain: Failed to find 'vkGetInstanceProcAddr' in layer "/home/leandro/.local/share/vulkan/implicit_layer.d/../../../lib/liblsfg-vk-layer.so". Skipping layer.
Qt debug: vkDebug: loader_create_device_chain: Failed to find 'vkGetInstanceProcAddr' in layer "/home/leandro/.local/share/vulkan/implicit_layer.d/../../../lib/liblsfg-vk-layer.so". Skipping layer.
Qt debug: vkDebug: loader_create_device_chain: Failed to find 'vkGetInstanceProcAddr' in layer "/home/leandro/.local/share/vulkan/implicit_layer.d/../../../lib/liblsfg-vk-layer.so". Skipping layer.
Window should have been closed: <PyQt6.QtWidgets.QMenu object at 0x737b8d8c7390>
2026-09-26 00:30:02,646:WARNING:waitress: unhandled close event

I set the app run like follow and it’s working fine: