[kde] [Bug 477948] New: VRR seems to break completely or get stuck always on with a hybrid GPU setup

[bugzilla_noreply at kde.org]

https://bugs.kde.org/show_bug.cgi?id=477948

            Bug ID: 477948
           Summary: VRR seems to break completely or get stuck always on
                    with a hybrid GPU setup
    Classification: I don't know
           Product: kde
           Version: unspecified
          Platform: Other
                OS: Linux
            Status: REPORTED
          Severity: normal
          Priority: NOR
         Component: general
          Assignee: unassigned-bugs at kde.org
          Reporter: kde.oqxcy at passmail.net
  Target Milestone: ---

SUMMARY

When running games or VRRTEST on a system that is using an AMD IGPU connected
to a display with an NVidia GPU used to render games with prime-run, adaptive
sync gets stuck on or stops working altogether.

Example 1: If i have adaptive sync set to automatic then run VRRTEST
(https://github.com/Nixola/VRRTest) with or without prime-run then close
VRRTEST it freezes with the VRRTEST image stuck on screen. I then have to
switch to a virtual terminal and back so i can see my desktop. 

Once back on the desktop my monitor will start flickering and the monitors HUD
will show the Hz switching between 240 and 48. If i change the display
configuration in system settings to "adaptive sync: never" it will still
continue flickering and my monitors HUD still shows the Hz switching between
240 and 48.

I can fix this by loading VRRTEST in gamescope and closing it, that stops the
flickering plus the switching between 240 and 48 Hz.

Example 2: If i run a game e.g doom eternal (but it seems to be any game) on
steam with proton but without gamescope then VRR stops working completely and i
have to log out and back in for it to start working again.

Also VRRTEST no longer freezes when closing once vrr is broken.


STEPS TO REPRODUCE
1.  Launch steam game without gamescope with "prime-run %command%" as launch
options.
2.  See adaptive sync isn't working in game and close game.
3.  Launch VRRTEST and see that the monitors refresh rate is no longer changing
anymore to match the fps. 

OBSERVED RESULT
adaptive sync not working

EXPECTED RESULT
adaptive sync working

SOFTWARE/OS VERSIONS
KDE Plasma Version:  5.90.0
KDE Frameworks Version: 5.246.0
Qt Version:  6.6.1

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