Arch Linux

laichiaheng

Member

Registered: 2017-02-12

Posts: 297

Adaptive-Sync refresh rate becomes unstable after log out

The refresh rate stays constantly at 160Hz when I enter the desktop, but once I log out and log in again, it keeps jumping between 138Hz and 160Hz.

The adaptive-sync is set to automatic mode.

https://youtu.be/EdKECONSJz4?si=IO6EzwUEHh5Io4NA

It seems to happen since linux 6.10 kernel was released, but I don't have older kernel, I can't test it.

GPU: AMD RX6750XT

ArchLinux.
6.10.5-zen1-1-zen
Trying display: wayland

vainfo: VA-API version: 1.22 (libva 2.22.0)
vainfo: Driver version: Mesa Gallium driver 24.1.6-arch1.1 for AMD Radeon RX 6750 XT (radeonsi, navi22, LLVM 18.1.8, DRM 3.57, 6.10.5-zen1-1-zen)
vainfo: Supported profile and entrypoints
      VAProfileMPEG2Simple            : VAEntrypointVLD
      VAProfileMPEG2Main              : VAEntrypointVLD
      VAProfileVC1Simple              : VAEntrypointVLD
      VAProfileVC1Main                : VAEntrypointVLD
      VAProfileVC1Advanced            : VAEntrypointVLD
      VAProfileH264ConstrainedBaseline: VAEntrypointVLD
      VAProfileH264ConstrainedBaseline: VAEntrypointEncSlice
      VAProfileH264Main               : VAEntrypointVLD
      VAProfileH264Main               : VAEntrypointEncSlice
      VAProfileH264High               : VAEntrypointVLD
      VAProfileH264High               : VAEntrypointEncSlice
      VAProfileHEVCMain               : VAEntrypointVLD
      VAProfileHEVCMain               : VAEntrypointEncSlice
      VAProfileHEVCMain10             : VAEntrypointVLD
      VAProfileHEVCMain10             : VAEntrypointEncSlice
      VAProfileJPEGBaseline           : VAEntrypointVLD
      VAProfileVP9Profile0            : VAEntrypointVLD
      VAProfileVP9Profile2            : VAEntrypointVLD
      VAProfileAV1Profile0            : VAEntrypointVLD
      VAProfileNone                   : VAEntrypointVideoProc

It also happens if I turn off the screen and turn it back on.

The problem is gone if the refresh rate is <=119.94Hz, everything >120Hz has this problem.
There is no way to select 119.94Hz in Plasma6, only Gnome can do it.

Last edited by laichiaheng (2024-08-19 06:05:05)

seth

Member

From: Won't reply 2 private help req

Registered: 2012-09-03

Posts: 75,831

Re: Adaptive-Sync refresh rate becomes unstable after log out

It seems to happen since linux 6.10 kernel was released, but I don't have older kernel, I can't test it.

https://wiki.archlinux.org/title/Ala

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laichiaheng

Member

Registered: 2017-02-12

Posts: 297

Re: Adaptive-Sync refresh rate becomes unstable after log out

It seems to happen since linux 6.10 kernel was released, but I don't have older kernel, I can't test it.

https://wiki.archlinux.org/title/Ala

If I set the GPU performance mode in CoreCtrl to Fixed, it doesn't happen anymore!
Is it a bug of AMDGPU driver??

Last edited by laichiaheng (2024-08-22 18:18:49)

seth

Member

From: Won't reply 2 private help req

Registered: 2012-09-03

Posts: 75,831

Re: Adaptive-Sync refresh rate becomes unstable after log out

https://gitlab.freedesktop.org/drm/amd/ … te_2532543
https://gitlab.freedesktop.org/drm/amd/-/issues/3437 ?

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How to upload text · How to boot w/o GUI · Disable Windows Fast-Start! · Fix your xinitrc