On 21.12.2021 12:12, Stakanov wrote:
OK, some more insight maybe. Unlike what I thought (I did not remember) I have two NIC on that system. It appears that either the NIC of the mainboard is broken or the driver has an issue. Currently I have deactivated the NIC of the mainboard and the problems went away. Curiously that also made me have an issue with the monitor settings, which I had to restore after a reboot. The NIC now is running on the PCI-e version 1 short lane of the board. As of now, the address is correctly acquired and the card works.
silversurfer:~ # lspci | egrep -i --color 'network|ethernet' 05:00.0 Ethernet controller: Intel Corporation 82574L Gigabit Network Connection which is now the working one.
06:00.0 Ethernet controller: Realtek Semiconductor Co., Ltd. RTL8111/8168/8411 PCI Express Gigabit Ethernet Controller (rev 06) which was the faulty / not working one.
Always use "lspci -nn" to show numerical IDs. Description is usually useless. Realtek could be a problem and to check what driver is needed/recommended information about actual device is needed.