After installing Budgie desktop to give it a try and updating plasma desktop packages, log in screen is not working.
This is what it shows: (I cannot click on anything or login.)

The current theme cannot be loaded due to the errors below, please select another theme.

I guess the problem is not with the theme. Installing other DE and updating some packages might have created disputes.
Please help me.

Hi!

What operating system are you using? You do not need a display manager to login. Just switch to another tty with Ctrl-Alt-F2, enter your username and password and your logged in. Then you can reconfigure the display manager, depending on your distribution. Start with

Code: Select all

systemctl status display-manager
# for debian based:
dpkg-reconfigure sddm


I suggest using root login to perform systemwide configuration changes, which means `sudo -i` on systems using sudo and no root password. Be careful. No try-and-error

I am using KDE neon. I am on live USB right now.

I searched on the internet and found out problem could be git packages. But i am not sure.
If I am able to login somehow, I will try to fix this problem, but the log in screen in frozen.

If you cannot switch to another tty you can edit the cmdline before loading the kernel. On a default Neon installation this should be GRUB starting the system. Press 'e' to enter edit mode and add systemd.unit=multi-user.target which should avoid starting the display manager (see systemd Kernel Command Line for more options).

If this does not work out either, start a live usb and chroot into the system by mounting it to e.g. /mnt, mount bind the additional stuff and chroot into /mnt.

Thank you so much for your help!

The problem was with Plasma. Looks like updating only the components of DE created disputes with other packages which is weird since it is not the same every time.
I thought everything froze, but I was able to get cli and change dm (thanks!). Then I Iogged in an did a full upgrade. Everything else is working fine now.

Thanks again for your help.

When I start sddm with sddm.service enabled, I have problems restarting. However, if I run "systemctl stop sddm" and then "systemctl start sddm", the greeter starts and everything is fine.

So the most interesting part is that the screen freezes on the fsck output at boot time. If I go to tty2 (without logging in) and then back to tty1, the screen goes black. Simply enter your password and the system will boot. Also (just tried) -enter the password in the "stack" output of fsck to log in again. So the greeter is there, but for some reason I can't see it-the screen doesn't update the console output to the greater. I tried another theme and cleared the sddm cache-no dice.

Hope this helps,
J Walter