On 16/03/2024 16:18, fran...@libero.it wrote:

root@debian:/home/frantal# networkctl
WARNING: systemd-networkd is not running, output will be incomplete.

OK, so all devices are under control of NetworkManager and there is no modification of its global configuration.

root@debian:/home/frantal# lspci
13:00.0 Ethernet controller: Realtek Semiconductor Co., Ltd. RTL8111/8168/8411 PCI Express Gigabit Ethernet Controller (rev 03)

In https://lists.debian.org/msgid-search/uspugc$u42$1...@ciao.gmane.io I asked for

    lspci -vnn -s 13:00.0

and if the "firmware-realtek" package is installed

https://lists.debian.org/msgid-search/ut0d7u$o4o$1...@ciao.gmane.io

What is the reason to install r8168 and what is its origin? r8168-dkms? From realtek site directly?

Have you tried kernel installed from bookworm-backports?

I hope the following should provide informative log for a suitable time frame.

- Unplug ethernet cable
- Start journalctl as root (e.g. "sudo -i" at first)
  journalctl -o short-precise -f | tee /tmp/cable.log
- Plug in the cable
- Wait ~15 seconds
- Kill the process by [Ctrl+C]

If unrelated system activity happened at this moment then it is better to repeat. The result should be saved to /tmp/cable.log (or another file you like).

P.S. The "reply to list" button on the mail list archive pages should properly set In-Reply-To message headers to keep discussion within a thread. Does your mailer support it?

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