https://bugs.kde.org/show_bug.cgi?id=521914

[email protected] changed:

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--- Comment #16 from [email protected] ---
Confirming this on my desktop PC: AMD iGPU (Granite Ridge) as primary + NVIDIA
RTX 5080 as a secondary/offload GPU, Wayland session.

> __EGL_VENDOR_LIBRARY_FILENAMES=/usr/share/glvnd/egl_vendor.d/50_mesa.json in
> .config/systemd/user/plasma-kwin_wayland.service.d/override.conf
The workaround worked for me. After a relogin, kwin_wayland no longer grabs the
render node of my NVIDIA GPU. PRIME render offload still works.

KWIN_DISABLE_VULKAN=1 did not fix it for me, only the EGL vendor override did.

> I'd much rather not. What problems is this actually causing for you?
The problem it caused for me: I use the dGPU both for VFIO passthrough to a VM
and for PRIME render offload. Since the update to kwin 6.7 the VM would no
longer start, because the GPU couldn't be unbound from the host while
kwin_wayland was still holding it. Downgrading to kwin 6.6.5 was the only other
thing that fixed it for me.

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