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Re: networkmanager hostname woes

From: Thomas Danckaert
Subject: Re: networkmanager hostname woes
Date: Thu, 14 Sep 2017 09:50:45 +0200 (CEST)

From: Alex Sassmannshausen <address@hidden>
Subject: Re: networkmanager hostname woes
Date: Wed, 13 Sep 2017 17:47:43 +0200

AFAIU, the cause is that networkmanager changes my hostname (after
DHCP?), in my case to “new-host2” or something similar, and this
seems to break the X session.  When I manually restore the hostname
with “sudo hostname <original-hostname>”, the problem is solved. Is
there anyway to disable this behaviour for networkmanager?
This makes me think that it might be a network configuration
derived issue — but I have not been able to get to the bottom of this

I see that you might be based in Belgium — I am too, and my home network uses most of the defaults from Proximus' B-Box 2. If this is the case for you too, then perhaps it is a matter of the default settings in that

Yes, I'm using the same router, and I can agree it's not “professional”-grade :-). Still, I don't think a bad router configuration should be able to change my hostname.

Following Christopher Baines' suggestion, I created /etc/hostname by adding the following to my system configuration:

(define etc-hostname-service-type
  (service-type (name 'etc-hostname)
                 (list (service-extension etc-service-type
                                          (lambda (hostname)
(list `("hostname" ,(plain-file "hostname" hostname)))))))))

and in the (operating-system (services ...)) list:

    (service etc-hostname-service-type host-name)

I don't know if this kind of extension should be added to an existing service (networkmanager itself, perhaps?). Though I have the feeling a more proper solution should exist.

From what I've read, it might also be a DHCP issue: some DHCP clients are configured to take on the hostname offered by the router, perhaps that could/should be changed? I see that wicd has its own settings for these things (/etc/wicd/wireless-settings.conf contains things like usedhcphostname = 0). I'm hoping someone with more experience can give some advice here :)


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