KDE Plasma 6 wayland session failed to start X11 works

After latest update of openSUSE Tumbleweed I’m unable to start Wayland session from login screen. X11 session is working without issue. I’ve tested create new user and login to Wayland session with absolutly same result (black screen and back to login screen after a while). Using my Dell 5521 with Intel and Nvidia MX450 with WD22TB4 docking station and 3 4K monitors. It is not working independently of the monitor setup (2x DP + HDMI on docking station or 2x DP on docking station and USB-C/HDMI directly to other Thunderbolt plug on notebook).

NVidia’s proprietary drivers have yet to evolve sufficiently to reliably support Wayland. Optimus Graphics (Intel GPU + NVidia GPU) complicates the issues further, as do docking stations and multiple displays. There are numerous threads covering theses issues to be found via a forum search here.

Given X11 works, why not use it?

Moreover, KDE 6 is too new. Wait for updates. Possibly KDE 6.1 will be beter.

Well X11 still has this issue. Additionally with latest nvidia proprietary driver the HW acceleration is not working properly again and X11 session is using llvmpipe graphic driver again (neither suse-prime nor switcherooctl is working as expected). Truth is I switched from X11 to Wayland for mentioned reasons, now I’ll have to handle current state somehow till something (either X11 or Wayland) get fixed…

Something to try: If you create a new user via the Plasma X11 session (leave everything default), then try to start a Plasma Wayland session as the new user via your display-manager, does that succeed?

It is absolutely same ;(

So latest updates fixes the Wayland issue. So now it’s working again as expected. System is using Mesa Intel UHD Graphics and everything seems to be accelerated properly again… Maybe general question is the packman repositories worth to use them ?

Thanks for the update.

And here we go again ;( latest updates same story (performed same tests) so no Wayland again and X11 running using llvmpipe so no acceleration at all through nvidia (probably no acceleration at all)…

If you peruse bugzilla.opensuse.org comments made by the primary packager/maintainer of X and NVidia components you may notice frequently a recommendation to not mix NVidia drivers with Wayland, but to stick to X11 and keep NVidia drivers, or purge NVidia drivers to use pure FOSS X components. The exact words vary, but the concepts are simple - one or the other but not both at the same time. It’s no small decision to make, as the volume of NVidia driver help threads provide ample evidence that purging NVidia drivers once installed is a process readily failed.

Found out what was the trouble ;(, messed up update of Mesa from tumbleweed repository. Reinstalling Mesa from packman repository solves the troubles…