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bug#39281: gdm doesn't start

From: Raghav Gururajan
Subject: bug#39281: gdm doesn't start
Date: Mon, 27 Jan 2020 08:51:25 +0000

> I believe that I've found the problem!


> Using the technique that Ludo’ described in 
> <https://issues.guix.gnu.org/issue/34580#17>, I was
> able to grab an strace of gdm (attached) while it was failing to start 
> properly. I was suspicious
> of the following line:
> """
> 418 22:46:10 sendto(8, "<13>Jan 26 22:46:10 gdm: GdmManager: couldn't look up 
> username
> gnome-initial-setup\n", 83, MSG_NOSIGNAL, NULL, 0) = 83 <5.487224>
> """
> so I removed gnome-initial-setup from the propagated-inputs with the 
> following patch, and, indeed,
> that resolved the problem with gdm on my system.

That's strange. Both our system share similar configuration. But for me gdm 
works fine with gnome-initial-setup being present. This is confusing.

> While I'm still not exactly sure why this was causing gdm problems, and why 
> `herd restart
> xorg-server` caused gdm to start working correctly, I think that removing 
> gnome-initial-setup from
> the gnome meta-package is the right thing to do. Instead, perhaps it could be 
> provided via its own
> service, auto-selected by the installer. If I recall correctly from other 
> distros (e.g. Fedora),
> the gnome-initial-setup wizard is run from its own user on first boot, and 
> after it finishes, the
> user is logged in as themselves. That said, gnome-initial-setup did seem to 
> run fine for me the
> first time I logged into gnome after it was installed, and hasn't stared 
> again.
> Thoughts?

I would say debugging and fixing would be better than removing. Let me see what 
I can do.
> P.S. Thanks Raghav for your work on making gnome in guix a better experience!

10-4 on the sarcasm. ;-)


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