https://bugs.kde.org/show_bug.cgi?id=522991

Zamundaaa <[email protected]> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|REPORTED                    |RESOLVED
         Resolution|---                         |DUPLICATE

--- Comment #15 from Zamundaaa <[email protected]> ---
> Does that mean the compositor sticks to one GPU (the first it decides to use) 
> for rendering and refuses to use the other GPU later?
It just means there are still general issues with interoperability between
Nvidia and other vendors.
https://invent.kde.org/plasma/kwin/-/merge_requests/9668 will paper over almost
all of them for Wayland-native apps at least.

For X11 apps, it's not something that will realistically ever be fixed, because
both the protocol and the implementation in Xorg have big limitations around
multi-GPU handling. You can likely use gamescope as a workaround in the future
though, so it starts a whole new Xwayland instance on a different GPU.

> I assume this causes kwin to stop copying render buffers, or disables some 
> Nvidia-related bad code
No, you just accidentally hit different code paths that can't assumed to work.
Nvidia requires modifiers, and I'll likely remove that environment variable at
some point because people just accidentally break their setups with it.

*** This bug has been marked as a duplicate of bug 452219 ***

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