After startup, everything works normally. I can open Firefox, open this page and read through to the Forum. All on a sudden I have no longer internet access. I have to disconnect to the wired connection and enable Wifi, which works without problems. Reconnecting to the wired ethernet is not possible. It just states “setting network address” but it’s not able to reconnect.
I have also seen that I have beside adapter enp0s3 again an eth0, which is the one connected after startup.
That’s how it looks after startup:
3: enp0s31f6: <NO-CARRIER,BROADCAST,MULTICAST,UP> mtu 1500 qdisc fq_codel state DOWN group default qlen 1000
link/ether 54:ee:75:96:74:10 brd ff:ff:ff:ff:ff:ff
5: eth0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc fq_codel state UNKNOWN group default qlen 1000
link/ether 00:50:b6:ce:73:a4 brd ff:ff:ff:ff:ff:ff
inet 192.168.0.136/24 brd 192.168.0.255 scope global dynamic noprefixroute eth0
valid_lft 3583sec preferred_lft 3583sec
inet6 fe80::250:b6ff:fece:73a4/64 scope link
valid_lft forever preferred_lft forever