Re: boot hangs when no ethernet cable is plugged in
On Wednesday 08 July 2015 23:40:55 Vincent Lefevre wrote:
> On my Debian/unstable laptop, when I boot without an ethernet cable
> plugged in, the boot hangs for several dozens of seconds with the
> following message:
>
> A start job is running for ifup for eth0
>
> I suspect that the default /etc/network/interfaces file is incorrect.
> It contains:
>
> allow-hotplug eth0
> iface eth0 inet dhcp
>
> which has the effect to start a DHCP client, which blocks the boot.
> Removing "allow-hotplug eth0" solves the problem (and I use netplug
> to connect automatically when an Ethernet cable is plugged in).
>
> So, I wonder why the default file contains "allow-hotplug eth0".
> This seems to be incorrect: it doesn't make sense to put eth0 up
> only because the network interface eth0 is present, which is always
> the case in practice. The condition should be that an Ethernet cable
> is plugged in.
Which is why it has "allow-hotplug eth0" and not "auto eth0".
The ways of systemd are still mysterious to me, but it shouldn't wait for
allow-hotplug surely, only for auto.
Lisi
>
> --
> Vincent Lefèvre <vincent@vinc17.net> - Web: <https://www.vinc17.net/>
> 100% accessible validated (X)HTML - Blog: <https://www.vinc17.net/blog/>
> Work: CR INRIA - computer arithmetic / AriC project (LIP, ENS-Lyon)
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