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 and if not report it there. You might also get help here 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.