The desktop won't start after lock screen error

The screen locker is broken and unlocking is not possible anymore.
In order to unlock switch to a virtual terminal (e.g. Ctrl+Alt+F2),
log in and execute the command:
loginctl unlock session c2
Afterwards switch back to the running session

I restarted and then the PC won’t start. Just stay charging the desktop untill the middle of the line of charge and stop

I have this errors.

journalct1 -xb -p3

  • Journal begins at Fri 2021-07-16 20:12:54 -05, ends at Sat 2021-07-17 20:16:25 -05. jul 17 20:15:26 daniel-x45u systemd-backlight [302]: Failed to get backlight or LED device ‘backlight:acpi_video0’: No such device

jul 17 20:15:26 daniel-x45u systemd[1]: Failed to start Load/Save Screen Backlight Brightness of backlight:acpi_video.

Subject: A start job for unit systemd-backlight@backlight:acpi_video0.service has failed Defined-By: systemd

A start job for unit systemd-backlight@backlight:acpi_video0.service has finished with a failure.

The job identifier is 255 and the job result is failed.

Thanks to all, and i am sorry for my English. I speak Spanish

Hola @Dgmz

welcome to the forum :slight_smile: Unfortunately, I don’t speak Spanish, but your English is quite OK. You might want to check the Spanish forum Español - Manjaro Linux Forum but I don’t know how many people are active there.

Are you starting KDE using KDE startup scripts or systemd as described here Plasma and the systemd startup – David Edmundson's Web Log

You might want to check if someone has a similar problem at https://bugs.kde.org/ and if not report it there. You might also get help here https://forum.kde.org/ to see if you can find someone to help you. You should, however try to provide as much information about your system as possible, so people have a better chance of helping you.