Hi,
On Mon, May 26, 2025 at 08:46:37PM -0700, accipiter wrote:
> In the past it was the old standard /etc/network/interfaces setup. I had
> commented-out all the lines associated with 'eth0', but it's possible
> there's something that I haven't adequately killed off. Is
> there some way to ensure that's thoroughly dead without messing up
> NetworkManager?
Show us the /etc/network/interfaces file and anything you have in
/etc/network/interfaces.d/ if that is still included from /e/n/i.
Any time I've seen this sort of thing happen it's been because something
else is bringing up a network interface before NetworkManager takes
control of it.
There was also this (11 year old) bug report where someone has
macchanger installed which was changing the MAC address of their eth0
every time the interface went down, which caused N-M to think the
normal eth0 was a new interface next time.
https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=771077
Thanks,
Andy
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