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Why turning off kwin compositor fixed my different refresh rates problem?

cn flag

Kubuntu X11 (I think) x64 RTX 2080 i9 9900k.

So I have 3 monitors @ 60hz and 1 @ 240hz, Everyone 1080p.

I always had the problem that the refresh rate was limited by the most weak monitor, this is 60hz in the 240hz monitor.

I found in a forum that if I turn off kwin this could be resolved.

So I have some questions.

What is KWin compositor and why turning off with shift+alt+F12 fixed my desktop different refresh rate problem? How can I keep this disabled after every reboot? Any advice about different refresh rate monitor management?

Nate T avatar
it flag
[This](https://en.wikipedia.org/wiki/Compositing_window_manager) should explain it better than I could. As far as the last question, you need to set up a custom **mode** with `xrandr`. Read the man_page. You may need to add the command to the bash rc file for persistence, but I wouldn't think it would be necessary. You will just need to try it and see if it stays across reboots.
cn flag
Disabling the compositor at startup in monitors isn't activating anymore, thanks
Nate T avatar
it flag
If you can't figure it out, you can use `xrandr auto` or `xrandr preferred` to set it back to what it was to begin with. Did you not read the manual? That is on you. Xrandr lets you explicitly set the refresh rate on a per-monitor basis. It can't get any more straight forward than that...
Nate T avatar
it flag
I have the exact same setup (3@~60, 1@240) and I used `xrandr` without issue, so I know it works.
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