Bug#771762: [DEPEND] Dependency failed for X11 Display Manager.

[Adrian Immanuel Kieß]

Dear Michael,

thank you for taking the time to process my bug report.

Just as sidenote, when I try to start GDM3 I also set gdm3 as the
default display manager. 

I also get 'Failed dependency: x-display-manager" messages (a lot) at
startup from systemd.

Now I am using xdm again. Kdm also works for me. Just GDM3 fails. But I
would like to use GDM3 again because the login with GDM3 also unlocks my
GNOME keyring.

With many greetings,

Adrian Immanuel KIEß


On Sat, 2015-01-10 at 14:25 +0100, Michael Biebl wrote: 
> Am 10.01.2015 um 11:49 schrieb Adrian Immanuel Kiess:
> > Package: gdm3
> > Version: 3.14.1-3
> > Followup-For: Bug #771762
> > 
> > Dear Maintainer,
> > 
> >    * What led up to the situation?
> >      Trying to run GDM3 at startup or with service gdm3 restart
> >    * What exactly did you do (or not do) that was effective (or
> >      ineffective)?
> >      service kdm stop; dpkg-reconfigure gdm3; service gdm3 start
> >    * What was the outcome of this action?
> >      GDM3 does not work in Debian/testing
> >    * What outcome did you expect instead?
> >      Running and working GDM3
> > 
> > currently in Debian/testing GDM3 is broken for me.
> > 
> > It seems it tries to spawn a Xorg instance but fails with that.
> > 
> > I'll give the system logs below:
> > 
> > adrian at g6 (~) % systemctl status gdm3.service
> > ● gdm.service - GNOME Display Manager
> >    Loaded: loaded (/lib/systemd/system/gdm.service; static)
> >   Drop-In: /run/systemd/generator/gdm3.service.d
> >            └─50-gdm3-$x-display-manager.conf
> >    Active: failed (Result: start-limit) since Sat 2015-01-10 11:38:47 CET; 6min
> > ago
> >   Process: 7364 ExecStartPre=/bin/sh -c [ "$(cat /etc/X11/default-display-
> > manager 2>/dev/null)" = "/usr/sbin/gdm3" ] (code=exited, status=1/FAILURE)
> > 
> 
> I think we can consider that a systemd bug and how it implements the LSB
> $x-display-manager facility
> 
> Currently, this is a target, where every display manager can hook into
> via a insserv override snippet.
> 
> Whenever another service requests the start of $x-display-manager, all
> display managers hooked up into x-display-manager.target will be started.
> 
> Since gdm is not your default display-manager (but kdm), the
> ExecStartPre= check will fail and thus the unit as a whole will be
> marked as failed.
> 
> That's obviously not really the behaviour we want.
> 
> After careful consideration, I think it's better, to map
> $x-display-manager to display-manager.service, which will be a symlink
> to the default display manager.
> 
> With Didier's systemd-default-display-manager-generator, it should be
> guaranteed, that /etc/systemd/system/display-manager.service points to
> something sensible.
> 
> I'd propose something like the attached patch.
> 
> CCing the pkg-systemd-maintainers mailing list for input/review.
> 
> 
> 
> 
> 
> 

-- 
With greetings from Leipzig, Germany.
Adrian Immanuel Kieß 

Administrator & programmer
Unix / Perl / LaTeX

mail: <adrian (at) kiess.at>
www: http://www.kiess.at
www: http://www.totaleueberwachung.de
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