Bug#771739: could not start nodm with systemd 217-1 or 217-2

[Martin Pitt]

Michael Biebl [2014-12-02 14:33 +0100]:
> Those are bugs in the lxdm and slim packages and need to be fixed there.

That'd be my preference too, TBH, but it was already n'acked by the
RT. Maybe we can reopen this, though.

> Trying to workaround that in systemd looks like the wrong approach.

The whole "configure your default DM" has become horribly complicated
in Debian :-( sysvinit and systemd both have their own ways of
enabling/disabling services, and on top of that we still have this
/etc/X11/default-display-manager thing which potentially
collides/disagrees with those, so I don't think there ever is a way to
get this right. But with the current situation of having to support
multiple inits and multiple DMs, I think that
/etc/X11/default-display-manager should be the configuration which
trumps systemctl enable/update-rc.d disable/enable, and thus we need
some central place to tell how to translate that file to a particular
boot sequence.

So while the DM packages certainly should be fixed to get a proper
unit, that still wouldn't completely fix the problems here -- we still
need something to sync /e/X/d-d-m with the init system specific
enabling/disabling. So the idea of that generator isn't too bad or
only a workaround IMHO.

However, it's been shown to be quite complex, so before we land this
in jessie I'd like to give it some more maturing in experimental. If
it turns out to cause more damage than good, we can rip it out again
and say "*sigh* don't do that then", if people try to be too clever
with configuring their DMs..

But Michael, I don't want to go over your head here. If you don't like
this at all, then let's stop this right away instead of risking more
debugging/work on this?

Thanks,

Martin
-- 
Martin Pitt                        | http://www.piware.de
Ubuntu Developer (www.ubuntu.com)  | Debian Developer  (www.debian.org)
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