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

Zamundaaa <[email protected]> changed:

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

--- Comment #9 from Zamundaaa <[email protected]> ---
So I suspect what happened is that Plasma 6.6 chose the Nvidia GPU as the
"primary" one by default, and in 6.7 that logic changed to be a bit smarter for
laptops.

6.7.4 helps because we enabled triple buffering on Nvidia and also added some
other fixes, but ultimately the issue is that these cross-GPU copies are very
slow with the proprietary driver, see bug 452219.
6.8 should help a bit with that as well, but ultimately the slow copies will
need to be fixed in the driver.

As a workaround, you could set the Nvidia GPU to be primary again with
https://invent.kde.org/plasma/kwin/-/wikis/Environment-Variables#kwin_drm_devices,
which will improve performance at the cost of increased power use.

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

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