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Mixed refresh rates question (lemmy.world)
submitted 1 year ago by sosodev@lemmy.world to c/linux_gaming@lemmy.world
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Hello everyone. I've read some posts before about Linux behaving poorly when using multiple monitors that have a different refresh rate.

Does anybody here know if X11 + AMDGPU + Mesa + Gnome handles this correctly? I'm thinking of getting a high refresh rate monitor (120hz+) while keeping my secondary at 60hz.

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[-] darcmage@lemm.ee 6 points 1 year ago* (last edited 1 year ago)

When I was on X11 (kde), my 144hz monitor would frequently feel like it was operating at 60hz but I could never figure out what the cause was. I used to turn off my 60hz monitor before gaming as a workaround. I quickly switched to wayland and haven't had to deal with it since.

[-] Max_P@lemmy.max-p.me 6 points 1 year ago

I have a 144Hz between a 60 Hz and a 75 Hz monitor.

It's not perfect, but does the job decently. In your ~/.profile:

export KWIN_X11_REFRESH_RATE=144000
export KWIN_X11_NO_SYNC_TO_VBLANK=1
export KWIN_X11_FORCE_SOFTWARE_VSYNC=1

If you enable TearFree, it makes the lack of proper vsync less noticeable and fixes the tearing caused by software vsync.

OP's probably SoL for Gnome though, because Gnome.

this post was submitted on 12 Jul 2023
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