On Saturday 14 July 2018 17:15:02 Nick Koretsky wrote:
> On Sun, 15 Jul 2018 02:04:07 +0200
>
> Stefan Krusche <linux@...> wrote:
> > Am Sonntag, 15. Juli 2018 schrieb Nick Koretsky:
> > > Um, no. This 99% not trinity bug. Your test result indicate bug in
> > > either in dpkg or debconf, and considering i dont have this problem on
> > > debian stretch it is probably a devuan introduced bug.
> >
> > I think I misunderstood your previous mail on 04.07.2018 from which I
> > concluded after I did the testing that it is a bug in tdm-trinity install
> > scripts.
> >
> > > 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.
> >
> > That is what happened in all my tests.
> >
> > > If it changed back to tdm-trinity
> >
> > That happened in none of my tests.
>
> Yep i missed the case with reinstalling slim while tdm is a default. That
> change to slim cannot happen as a result if tdm-trinity bug. It is also
> cannot be a bug in slim because a change happens while reinstalling
> tdm. This is a bug in debconf probably but maybe in dpkg. Well
> theoretically there is a possibility that there are bugs in both slim and
> tdm-trinity packages...
>
> > Also I found an old bug report (#36) on trinity bugzilla[1] which
> > described the same problem with gdm and kdm-kde3 packages and which had
> > been closed "due to lack of response". That assured me somehow of having
> > run into the same one.
> >
> > > than this is a bug in dpkg (probably devuan one, as i dont have this
> > > problem on stretch). Report this to devuan.
> >
> > The slim package has been adopted by devuan. After all, I think you're
> > right. Thanks again.

Sorry, got to add my 2 cents' worth here. I believe that this must be a Devuan 
bug; there could be problems with slim and tdm-trinity, although I think it 
is immaterial to my point here. 

The reason I would trace it to Devuan is that I only ever ran apt-get 
dist-upgrade; I never tried to install slim or xfce, nor libreoffice, etc., 
but these were installed automatically. I had assumed, wrongly, that I would 
get only upgrades of what was already installed. 

For about three months previously, I had made no changes whatsoever to my 
system, except periodically to run apt-get dist-upgrade; then suddenly I get 
these extra packages installed. That's why I say it must be a Devuan bug, and 
maybe a recent bug. 

It looks like some of us need to join a Devuan mailing list, as well. 

Bill