Graphic crash while swaping plasma6-sddm for sddm

[adam]

Thank you Ben.

I performed a fresh installation and then ran

sudo dnf clean all; sudo dnf swap plasma6-sddm sddm 

and the same thing as before happened, immediate black screen. I pressed Ctrl+C and then typed “reboot” and hit return in case I had control of my terminal back but I had to force a hard shutdown anyway.

So I booted back into my system and since I no longer have a working desktop environment, I no longer have that problem, and ran the swap commands you recommended. After that I upgraded the kernel as directed and ran your dsync command as directed.

When I rebooted, the problem persists! I am quite surprised to be honest but here is the error message I receive from the plasmashell command:

qt.qpa.xbc: could not connect to display.
qt.qpa.plugin: From 6.5.0, scb-cursor0 or libxcb-cursor0 is needed to load the Qt platform plugin.
qt.qpa.plugin: Could not load the Qt platform plugin "xcb" in "" even though it was found.
THis application failed to start because no Qt plugin could be initialized.  Reinstalling the application may fix this problem.

Available platform plugins are: vkkhrdisplay, offscreen, minimal, linuxfb, xcb, eglfs, vnc, minimaleg1, wayland-brcm, wayland-eg1, wayland.

Aborted (core dumped) plasmashell

Sorry for any typos I had to copy that by hand there may be a few…

So I did as it recommended and issued

sudo dnf reinstall plasmashell

And ran the command again. Same result, sorry.

[ben79 (Ben Bullard)]

When I tested this on a real ROME system on hardware it worked for me.

Maybe after:

sudo dnf clean all ; sudo dnf swap plasma6-sddm sddm

I would guess if screen goes black user needs to boot to console mode and run:

sudo systemctl enable sddm

Then to be sure sddm is enabled run:

sudo systemctl status sddm

reboot

I would try it and see. Meanwhile I will add those steps to the how to. The changes have been a lot because of dropping Plasma5 and changing all the names of KDE packages. When what got done and so forth may have led me to make a mistake.

[ben79 (Ben Bullard)]

I don’t have time to die it but I need to test this again.