KDE disappeared from the login options.
 

I've been trying to get sound working once again following a transition from Leap 15.3 to TW. One problem that I immediately ran into was that the audio function on the motherboard -- which I want to be the primary sound card -- seems to get into an argument with the TU116 chip and the desktop is nothing but brief status messages switching between the TU116 and whatever else (happens to fast to even read). Anyway, upon booting into the BIOS, disabling the onboard audio, and rebooting, I'm dumped into Gnome. KDE doesn't even appear in the available desktop options on the login screen.

Browsing in YaST shows that all the KDE packages appear to be installed but KDE is not showing up as a desktop option on the login screen.

How do you get that back without having to re-install the entire OS?

Would rolling back the OS to, say, a day ago, help? Not having any experience in having to do this before, what would the command be to pull that off?

TIA for any hints about how to recover from this.

Force reinstalling the following ought to cover getting all of the KDE necessaries installed:

• patterns-base-x11
• patterns-base-x11_enhanced
• patterns-kde-kde
• patterns-kde-kde_plasma
• plasma6-session
• plasma6-session-x11

It might be helpful to replace GDM with SDDM if GDM is installed as default-displaymanager in update-alternatives.

I never use BTRFS, so have no personal experience with rollbacks to offer.

Updating those packages in YaST did the trick. Many thanks!

I already had SDDM installed i lieu of GDM.

Sadly, the openSUSE documentation seems to cover Leap instead of TW. I felt like I was taking a bigger chance with the rollback than I was looking to get involved in.

Again... thanks. Marking this as solved.