from your discussion i searched the dmesg for “enp”
[Fr Dez 1 07:26:22 2023] e1000e 0000:00:1f.6 enp0s31f6: NIC Link is Up 1000 Mbps Full Duplex, Flow Control: Rx/Tx
[Fr Dez 1 07:26:24 2023] r8152 4-1.2:1.0 enp63s0u1u2: renamed from eth0
[Fr Dez 1 08:44:48 2023] r8152 4-1.2:1.0 enp63s0u1u2: Stop submitting intr, status -71
[Fr Dez 1 08:44:51 2023] r8152 4-1.2:1.0 enp63s0u1u2: renamed from eth0
[Fr Dez 1 08:59:46 2023] e1000e 0000:00:1f.6 enp0s31f6: NIC Link is Down
[Fr Dez 1 08:59:52 2023] e1000e 0000:00:1f.6 enp0s31f6: NIC Link is Up 1000 Mbps Full Duplex, Flow Control: Rx/Tx
[Fr Dez 1 09:00:00 2023] r8152 4-1.2:1.0 enp63s0u1u2: renamed from eth0
[Fr Dez 1 09:37:36 2023] r8152 4-1.2:1.0 enp63s0u1u2: Stop submitting intr, status -108
[Fr Dez 1 09:37:39 2023] r8152 4-1.2:1.0 enp63s0u1u2: renamed from eth0
[Fr Dez 1 09:44:47 2023] r8152 4-1.2:1.0 enp63s0u1u2: Stop submitting intr, status -108
[Fr Dez 1 09:44:51 2023] r8152 4-1.2:1.0 enp63s0u1u2: renamed from eth0
[Fr Dez 1 09:52:34 2023] e1000e 0000:00:1f.6 enp0s31f6: NIC Link is Down
[Fr Dez 1 09:52:35 2023] r8152 4-1.2:1.0 enp63s0u1u2: carrier on
[Fr Dez 1 09:52:36 2023] r8152 4-1.2:1.0 enp63s0u1u2: carrier on
[Fr Dez 1 09:52:41 2023] r8152 4-1.2:1.0 enp63s0u1u2: renamed from eth0
[Fr Dez 1 09:52:44 2023] r8152 4-1.2:1.0 enp63s0u1u2: carrier on
1.) we are speaking in my laptop from e1000e which is not usable in my laptop. The r8152 was unused in the monitor
2.) in second part of log i taken out the cable and plugged into monitor. r8152 then comes up and my system is usable also with newest 6.6 kernel.
i will test next minutes what if im not using the monitor plugged in if the availability of unused r8152 makes the problems