Re: Ethernet interfaces ignoring 'Connect Automatically' setting on Debian 12 (Bookworm)

[Lee <ler762@gmail.com>]

On Thu, Apr 3, 2025 at 9:32 PM <coffeeforblood.pardon117@slmail.me> wrote:
>
> Background Information
> =======================
>
> Debian 12 Bookworm has been freshly installed on a laptop. The laptop is functioning as a simple home server and has three Ethernet devices, two USB Ethernet adapters and a built-in Ethernet adapter. Ethernet cables are permanently inserted into each of the Ethernet ports on the server laptop, the other ends are only inserted into client devices as needed.
    ... snip

> Problem
> =========
>
> Since installation, the Ethernet connections have refused to honor the "Connect Automatically" setting in Settings >> Network when a cable from the server is connected to a client. It is my expectation that when a cable from the server is connected to the Ethernet port of a client device, the Debian server will automatically recognize the new physical connection and then automatically activate that connection. Unfortunately, this doesn't happen for any of the server's Ethernet ports.
>
> The Debian server will recognize that a new physical connection has been made, which is demonstrated by the change from "Cable unplugged" to "100Mb/s" or "1000Mb/s" in the Network Settings window, but the server will not activate the connection automatically. Each must be manually activated using the toggle either in Network Settings or through the top panel menu for the connection to become usable. This is true for the built-in Ethernet port and the USB adapter ports.
>
> Each of the Ethernet devices uses the following common connection profile settings:
>
> Details section:
>    Connect Automatically ON
>    Make available to other users OFF

Can you try it with Make available to other users ON

Regards
Lee