lightdm faild to start:
● lightdm.service - Light Display Manager
Loaded: loaded (/usr/lib/systemd/system/lightdm.service; enabled; vendor preset: disabled)
Active: failed (Result: exit-code) since Sun 2021-04-18 18:41:16 CEST; 1min 23s ago
Docs: man:lightdm(1)
Process: 2968 ExecStart=/usr/bin/lightdm (code=exited, status=1/FAILURE)
Main PID: 2968 (code=exited, status=1/FAILURE)
Apr 18 18:41:16 BlackBox systemd[1]: lightdm.service: Scheduled restart job, restart counter is at 5.
Apr 18 18:41:16 BlackBox systemd[1]: Stopped Light Display Manager.
Apr 18 18:41:16 BlackBox systemd[1]: lightdm.service: Start request repeated too quickly.
Apr 18 18:41:16 BlackBox systemd[1]: lightdm.service: Failed with result 'exit-code'.
Apr 18 18:41:16 BlackBox systemd[1]: Failed to start Light Display Manager.
-- Journal begins at Sat 2021-04-10 21:04:55 CEST, ends at Sun 2021-04-18 18:48:55 CEST. --
Apr 18 18:41:16 BlackBox systemd[1]: Failed to start Light Display Manager.
Apr 18 18:42:58 BlackBox lightdm[12504]: gkr-pam: unable to locate daemon control file