Re: [gentoo-user] x11-misc/sddm-0.18.1-r6 exits inexplicably

[Michael]

On Sunday, 10 April 2022 12:12:43 BST Michael wrote:
> On Sunday, 10 April 2022 10:26:09 BST Neil Bothwick wrote:
> > On Sun, 10 Apr 2022 10:18:29 +0100, Michael wrote:
> > > > The PC is a laptop, which is usually connected to ethernet.  Following
> > > > Neil's prompt I just started it, without an ethernet cable connected,
> > > > to check what Xorg log shows . . .  O_O
> > > >
> > > > Well, what do you know!  SDDM started properly, with mouse, GUI and
> > > > all.  No pam_unix problem.  I am now even more confused than before.
> > > > Why would the presence of an ethernet connection determine if SDDM
> > > > starts and then exits, or not?  :-/
> > >
> > > This behaviour is repeatable.  Why would the presence of a network
> > > connection on this PC affect SDDM?!
> >
> > When you don't have the cable, are you using wireless or no network? Have
> > you tried waiting a few minutes to see if SDDM comes up? I wonder if this
> > could be a DNS or IPv6 issue? Remember the old saying "The problem is
> > always DNS. Even when it's not DNS, it is DNS".
>
> Thank you Neil for prompting my brain to work in a different direction.  :-)
>
> (As it happens I've experienced some DNSSEC issues on a router following a
> buggy firmware update, but this would be seriously O/T for this M/L.)
>
> I have waited for minutes to see if SDDM will eventually kick in.  It seems
> the pam_unix intervention is terminal.  SDDM does not start once session c1
> .
>
> The laptop has an ethernet NIC on the MoBo, which is gimped at 100Mbps.
> This is not used under normal circumstances.  Instead I use a USB 3.0 1Gbps
> ethernet adaptor.  Following your prompts I unplugged the USB ethernet
> adaptor, connected the ethernet cable to the NIC on the MoBo and rebooted.
> No problem.  SDDM launches as it should.
>
> So this could be udev related?  While udev isrobing the USB adaptor and
> starting the dhcp negotiation, somehow this sequence interferes with the
> SSDM starting up?

I replaced  the USB ethernet adaptor with a USB wireless adaptor, plugged into 
the same port.  Rebooted and SDDM starts normally.  So, this problem only 
occurs when I have the wired USB adaptor plugged in.  What could be a possible 
cause?