All fonts getting totally blurry in KDE within a few seconds - Tumbleweed 6.6.7 + NVidia RTX4000 latest driver

[jea74]

Dear Community, since the update to 6.6.6 and 6.6.7, all fonts in KDE are getting blurry in a few seconds
Especially the fonts of the desktop icons, hovering the mouse refreshes the fonts correctly for a few seconds then they get blurry again !?
Except the normal updates, I did not change anything else. It happened since the update to kernel 6.6.6
I have a NVidia RTX4000 and I tried the 2 latest drivers “production” and “new features”, same problem…
Thank you
Jea

[hui]

After update to 15.5 fonts slowly blur KDE

I updated from 15.4 to 15.5 today. All seemed well but after logging in all of the desktop fonts will slowly fade to a blur. Even in active windows. They seem to ‘wake up’ when you move the mouse around but quickly revert to their blurry state. I seriously thought I was having a stroke. As it is unusable at this point I am running IceWM but I would prefer to be using KDE. What have I tried: Uninstalling and re-installing nVidia driver. Disabling Desktop effects. Ensuring DPI is at 96 Reboot…

[dcurtisfra]

@jea74:

Does this also happen if, a new, fresh, Test User is configured on the machine?

---

If, the Test User is OK then, possibly a Cache issue –

• Clean out the affected user’s ‘~/.cache/’ directory and then, have the affected user login again.

[jea74]

Hello, yes, with a new freshly user created with yast, it is OK ! The fonts are stable & normal as you expected.
Then I deleted the .cache folder for my usual user, full reboot and …same problem, blurry fonts again fading in a few seconds !? So not a driver/hardware problem but a user problem ?
Thanks

[dcurtisfra]

@jea74

So not a driver/hardware problem but a user problem ?

Then, a KDE Plasma configuration issue …

• Possibly the Hardware → Display and Monitor → Compositor → Latency setting.
• Or, Appearance → Fonts → Anti-Aliasing or Sub-pixel rendering or Hinting.
• Or, Workspace → Workspace Behavior → Desktop Effects – possibly an Effect which causes the characters to blur after a while.

[jea74]

Hi, Thanks for the follow-up - I tried all you suggest: no change
I now have: minimum latency, fonts anti-alias. enabled, tried nearly all combinations subpixel/hinting, removed all the desktop effects, reinstalled once again the nvidia driver. I also remove the ~/.config folder, no change.
It is really strange that the new user is not affected !?
This machine is running Tumbleweed/Kubuntu/Windows, I have only this problem with my usual Tumbleweed user.

[jea74]

Just noticed that if you have no window opens on the desktop and do nothing, icon fonts are stable, once you start opening at least 1 window or hover over the taskbar, then the icon fonts start “melting” !

[myswtest]

Are you logging in using “Wayland KDE Plasma” ?

Or plain ol’ “X11 KDE Plasma” ?

[jea74]

X11 Plasma - for both users