After recent zypper dup networkmanager start disconnect ethernet (internet) connection every few minutes. What is the problem could be and how to solve?
Please monitor the NetworkManager logging in a terminal with
sudo journalctl -fu NetworkManager
and capture the relevant output when disconnection occurs. Post here for others to advise further.
If preferred you can redirect the output to a text file, and review later…
sudo journalctl -fu NetworkManager > output.txt
Will do. It actually does not disconnect: it stops to receive incoming packages. Disconnect/Connect interface in NM-applet helps to restart and resume connection and incoming packages.
Ok, that’s a slightly different description to that mentioned in your opening post. Is this all traffic? You could try a constant ping to a well known internet address? Are you using a VPN? More info required here.
You could also check that the interface is negotiating correctly perhaps…
Unplug and re-plug a few times to ensure that it is consistent.
Yes, all traffic. Not using VPN. Not reproducible today after PC start. Yesterday set MTU to 8192, added
lines to /etc/NetworkManager/NetworkManager.conf
> /usr/sbin/ethtool enp6s7 Settings for enp6s7: Supported ports: TP MII ] Supported link modes: 10baseT/Half 10baseT/Full 100baseT/Half 100baseT/Full Supported pause frame use: No Supports auto-negotiation: Yes Supported FEC modes: Not reported Advertised link modes: 10baseT/Half 10baseT/Full 100baseT/Half 100baseT/Full Advertised pause frame use: No Advertised auto-negotiation: Yes Advertised FEC modes: Not reported Link partner advertised link modes: 10baseT/Half 10baseT/Full 100baseT/Half 100baseT/Full Link partner advertised pause frame use: Symmetric Link partner advertised auto-negotiation: Yes Link partner advertised FEC modes: Not reported Speed: 100Mb/s Duplex: Full Port: MII PHYAD: 32 Transceiver: internal Auto-negotiation: on Cannot get wake-on-lan settings: Operation not permitted Current message level: 0x00000007 (7) drv probe link Link detected: yes