After plasma 7 update, impossible to get graphic display -- sddm or plasmaahell?

[joneall]

I updated this morning and plasma 7 was installed. But when I boot, I just get a tty login invite. I can login, but can't do anything afterwards. I can't launch plasmashell and it knows no command kwin.

During the update, it asked if I wanted plasmashell or sddm. Not having any idea what that means, I selected the default, which was sddm. What is sddm? Could that be my pb

Thanks in advance for any help.

[claydoh]

it asked if I wanted plasmashell or sddm

That was to select the desired login manager, SDDM or Plasmalogin, as Plasmalogin is now installed by default.

SDDM is the login manager favored by KDE for some years now

Plasmalogin is its replacement. It is actully based on SDDM, so it will have the same sort of look at the moment.

It is fine to use SDDM, but if you do any package cleanup, it will be removed, so you will end op on Plasmalogin anyway.

As to the upgrade to Plasma 6.7 , I do not know what might be causing your problem. Mine was fine, other than a notification for 2 phantom, non-existant updates that showed in Discover, that went away after a while. (Nope, they are still there)

The command to start Plasma from a tty login will be startplasma-wayland, or startplasma-x11 if you use that.

You might check for updates if you can, maybe you did not get all of them?

[Carmikatze]

I had the same issue with my machine. I was able to get it running again. After a login I could start plasma with:

exec /usr/bin/dbus-launch --exit-with-session startplasma-wayland

After I had that running I reeinstalled plasmalogin:

sudo apt install --reinstall plasmalogin

and reloaded the service:

sudo systemctl daemon-reload

[joneall]

The command to start Plasma from a tty login will be startplasma-wayland, or startplasma-x11 if you use that.

I tried startplasma-wayland and got

/usr/bin/xrdbCa't open display
xcb_connect() failed

[joneall]

I tried Carmikatze's method, but after
exec /usr/bin/dbus-launch --exit-with-session startplasma-wayland
my system was completely hung. no possibility of entering any command. even ctl-C, D or X failed to get any response.

Now I'm afraid to update my other system.