On Wed, 4 Jul 2018 13:48:41 +0200
Stefan Krusche <linux@...> wrote:
 
> 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-
> --
> What can you get out of this?
> 

Ok, this looks normal. At this point if you want to track down the bug, i
suggest following:

Force reinstall tdm-trinity (unless you clean apt-cache the package is
in /var/cache/apt/archives, just dpkg -i the last version.

If default dm stays tdm-trinity after that than i have absolutely no idea
what happened. Maybe whatever program you used to update (apt? apt-get?
aptitude? some gui?) calls dpkg in some weird way, but its hard to track
this - downgrade to a previous version and upgrade again using different
programs?

If it changed to slim - Force reinstall slim.

If default dm remained slim after that than this is a bug in tdm-trinity
install scripts, create a bug report in trinity bugzilla.

If it changed back to tdm-trinity than this is a bug in dpkg (probably
devuan one, as i dont have this problem on stretch). Report this to devuan.




-- 
  Nick Koretsky (nick.koretsky@...)