From mboxrd@z Thu Jan  1 00:00:00 1970
From: Mark H Weaver <mhw@netris.org>
Subject: Re: NetworkManager instead of Wicd in =?utf-8?Q?=E2=80=98%desktop?=
	=?utf-8?Q?-services=E2=80=99=3F?=
Date: Mon, 31 Jul 2017 13:37:32 -0400
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In-Reply-To: <87379c7n5q.fsf@gnu.org> ("Ludovic
	\=\?utf-8\?Q\?Court\=C3\=A8s\=22'\?\=
	\=\?utf-8\?Q\?s\?\= message of "Mon, 31 Jul 2017 15:26:25 +0200")
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To: Ludovic =?utf-8?Q?Court=C3=A8s?= <ludo@gnu.org>
Cc: guix-devel <guix-devel@gnu.org>, Maxim Cournoyer <maxim.cournoyer@gmail.com>

ludo@gnu.org (Ludovic Court=C3=A8s) writes:

> Maxim Cournoyer <maxim.cournoyer@gmail.com> skribis:
>
>> I've noticed the same (lack of DNS resolution) following a reboot for
>> some minutes and was also wondering what was causing this. I'm using
>> wicd as part of the %desktop-services, so that specific problem is
>> probably not related to NetworkManager.
>
> Our default nscd config caches lookup failures for 20 seconds by default
> (see =E2=80=98nscd-cache=E2=80=99 in the manual.)  So if you look up a ho=
st before
> networking is up, and it fails, then there=E2=80=99s a window during which
> lookup will keep failing.
>
> I don=E2=80=99t know if that explains what you=E2=80=99re seeing.

I don't know about Maxim, but waiting 20 seconds definitely doesn't
solve the problem for me.  I've sometimes waited quite a long time after
rebooting before doing something that requires network access, and then
realizing that DNS is not working and that I forgot to go through the
disconnect+reconnect+test loop until it starts working.

      Mark