Hi Nick, thank you. I looked after that. Am Dienstag 03 Juli 2018 schrieb Nick Koretsky: > First, a you sure that slim wasnt updated too? Because if it was it is most > likely bug in slim. If not than this looks like a problem with debconf > database (or a bug in debconf). As to what is logged in /var/log/aptitude, slim was only once installed when I set up the system. --> /var/log/apt/history.log says this about slim and tdm-trinity: Start-Date: 2018-06-03 23:03:03 Install: [...], tdm-trinity:amd64 (4:14.0.5~pre36-0debian9.0.0+6), [...] Start-Date: 2018-06-04 15:04:08 Install: [...], slim:amd64 (1.3.6-5.1+devuan2), [...] Start-Date: 2018-06-28 16:15:17 Upgrade: [...], tdm-trinity:amd64 (4:14.0.5~pre36-0debian9.0.0+6, 4:14.0.5~pre39-0debian9.0.0+6), [...] Start-Date: 2018-07-02 11:42:01 Upgrade: [...], tdm-trinity:amd64 (4:14.0.5~pre39-0debian9.0.0+6, 4:14.0.5~pre42-0debian9.0.0+6), [...] When I upgraded tdm-trinity the first time from "~pre36" to "~pre39", after slim had been installed, the problem appeared, that the default display-manager got changed. That's why I was thinking it might have something to do with package tdm-trinity. But I don't understand this whole update and configuration process sufficiently enough, that I really could tell. And, yes, could have something to do with slim package as well. > Look in /var/cache/debconf/config.dat for shared/default-x-display-manager > and post a context of this section Alright, /var/cache/debconf/config.dat is from 2018-07-03 15:27:28, probably when I manually reconfigured display-manager, and not from when I did the upgrade on 2018-07-02 11:42:01. This is in it: $ grep -n -A1 -B1 -E "tdm|slim" config.dat 756-Template: shared/default-x-display-manager 757:Value: tdm-trinity 758:Owners: slim, tdm-trinity 759-Flags: seen 760-Variables: 761: choices = slim, tdm-trinity 762- -- 784- 785:Name: slim/daemon_name 786:Template: slim/daemon_name 787:Owners: slim 788- -- 812- 813:Name: tdm-trinity/daemon_name 814:Template: tdm-trinity/daemon_name 815:Owners: tdm-trinity 816- 817:Name: tdm-trinity/stop_running_server_with_children 818:Template: tdm-trinity/stop_running_server_with_children 819:Owners: tdm-trinity 820- What can you get out of this? Regards, Stefan