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.
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
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.