Screen becomes unsuable after changing refresh rate (KDE Plasma 6.2.4)

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Hello to all reading this post, I am a new Tumbleweed user and so far enjoying my experience. Currently, my screen’s refresh rate is set at 144hz and I wish to reduce it to 60hz to have better battery backup. However, when I switch to it, upper half of my screen goes blank and only lower half is visible, but everything works fine with 144hz.

I am on Tumbleweed (20241223) with KDE Plasma 6.24 as my DE.

Could someone please help me resolve it?

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I have no 144 screens to test with, so can only suggest things to try, in no particular order:

  1. Your login screen should have a place to select session type. If you can find it, try choosing something different from usual. Does behavior remain the same when you do? If you find the alternate seems to provide no method to change the rate, install and try arandr (a GUI tool), or just try xrandr (a command line tool). Also, try more than one alternate session type.
  2. Check to see if your laptop has a firmware update to offer, and if so apply it.
  3. Try disabling Kscreen 2 in Plasma autostart settings and use xrandr or arandr instead of plasma settings to change the rate.
  4. Check in BIOS setup to see if there may be an option to change affecting ability for a program to make such changes.
  5. Add a new user to use to check if the bad behavior applies there also. If it doesn’t, it probably means you you changed something in your own settings to cause the problem.
  6. While logged out of Plasma, delete the entire content of ~/.cache/, then login to Plasma again.
1 Like
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Thanks for all the great suggestions, I have the latest graphics driver and firmware installed. I was able to get it done by clearing out the ~/.cache, however only for Wayland (X11 is still broken). Before posting here, I tried with Wayland, but it seems clearing the cache was necessary to make it work.

I was not switching to Wayland thinking that X11 would be more stable and would have better support, but doesn’t seem like it. I am yet to try it with multi-monitor setup after the holidays, in your experience is Wayland stable enough for everyday tasks?

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My personal experience with Wayland is too close to zero for my opinion to be useful.

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Okay, no problem, then I will test it. Thanks again for your help!

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Can’t you set the refresh rate in the monitor’s OSD setup? Then TW should recognize the monitor correctly at boot, with X11 or Wayland.

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Unfortunately even that’s not working for me, as soon as I log into x11 session, my screen is half blank. But no issues with Wayland.

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