I have an AMD Ryzen 7 9800X3D 4.7GHz processor and AMD Radeon RX 9070 XT setup hooked up to a Samsung S90D as a monitor. Running Fedora KDE Plasma.

I can enable 120hz and HDR from my settings but see no way to set VRR anywhere. It works with the Playstation so I know the tv is capable. I asked AI a couple times just to get a rough idea of things I could try and tried the command

kwriteconfig5 --file kwinrc --group Compositing --key “VRR” “true”

but didn’t recieve a response so idk if this worked or not. Is this going to require installing AMD proprietary drivers? I briefly read a little about that and it looks like the process is quite a bit above my current skill level.

I saw a dev post about disabling Multi Stream Transport on the monitor but I could not find this setting on my tv anywhere so I think this may be a monitor only setting.

Any help or guidance would be greatly appreciated thank you so much in advance!

  • Vik@lemmy.worldEnglish
    2·
    20 days ago

    You don’t need proprietary drivers nor should you have to disable MST.

    If you’re using HDMI 2.1, you won’t be able to use VRR on a Linux system as the HDMI forum have blocked the AMDGPU implementation for the feature - they don’t allow FOSS implementations of HDMI 2.1 VRR

    More info here https://wiki.archlinux.org/title/Variable_refresh_rate

    • DanceMomsSavedMe@piefed.socialOPEnglish
      0·
      20 days ago

      Edit: Just now saw the answer in your comment above that’s a huge bummer damn the HDMI Forum but thank you so much for the answer!

      I havent seen a setting for it but on this tv if you hold down the play button it opens a game mode taskbar that says the resolution if HDR is enabled and if VRR is on or off.

      On PS you can set the settings on the playstation itself to automatically use VRR when available so when I’m not running a game it says VRR off on that game mode bar that the tv pulls up but when I start a game it automatically switches it on and says VRR On on the game mode taskbar.

      • priapus@piefed.socialEnglish
        1·
        16 days ago

        AFAIK some HDMI to DP converters can be used to work around this. Since the converter is handling the VRR management in its own code, then converting it to DP, there’s no need for a FOSS implementation