Even if i have a completly different configuration, but i do have the following issue:
lightdm failing randomly (some days more, some days less)
If i look into the logs of X.org: Sometimes lightdm fails because xorg failed. Xorg says there is no graphic. In my setup “nouveau” is not recognized. Then i reboot, and it works.
After a while of searching, i think this is not an issue of the graphic card at all. There are a lot of reported problems of this sort. The common thing seems to be:
xorg fails to access the graphic-card (whatever type it is)
even when GUI shows, the log of lightdm shows 1-5 restarts of lightdm
