Seems it was a random issue. After a further reboot, the problem came up again. On another machine with two seats the problem disapears reliabally when I add "minimum-vt=10" to /etc/lightdm/lightdm.conf. But this workarround does not work on the other machine...
Attached you see my config.
Seems it was a random issue. After a further reboot, the problem came up again. On another machine with two seats the problem disapears reliabally when I add "minimum-vt=10" to /etc/lightdm/ lightdm. conf. But this workarround does not work on the other machine...
Attached you see my config.