https://bugs.kde.org/show_bug.cgi?id=527544

--- Comment #13 from Eduardo Romero <[email protected]> ---
Confirmed: MR 10214 (commit 3bbbfdae, "backends/drm: move direct scanout device
check to the compositor") fixes this on my setup.

Tested on Gentoo with KWin 6.8.1 plus that commit rebased as a user patch.
NVIDIA-primary via KWIN_DRM_DEVICES=<nvidia>:<intel>, with KWIN_ALLOW_DMABUF_V6
unset (the previous workaround). After reboot:
- Desktop and lock-screen wallpaper render correctly
- Windows repaint without resizing
- Hover is immediate
- supportInformation OpenGL renderer: NVIDIA GeForce RTX 3070 Laptop GPU
- plasmashell and kwin_wayland both on the NVIDIA GPU

MR 10196 did not fix it here (comment 8). With MR 10214, KWIN_ALLOW_DMABUF_V6=0
is no longer needed.

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