Das nervt mich schon seit irgendeiner LM 18 Version => plötzlich kam immer die Meldung Netzwerkverbindung fehlgeschlagen, obwohl man problemlos im WLAN unterwegs war. Problem war nicht leicht im Netz zu finden. Es lag wohl im LTE Modem…
Step #4, above, showed us that there is in fact a cdc_ether kernel module installed. This may be due to a previous USB to 4G dongle, a USB to Ethernet dongle, a TomTom GPS device, or an internal 4G adapter.
Since we’re not sure exactly which software install might have added this cdc_ether driver, and associated software, we’ll try a safe way to fix this first…
Create a new blacklist file…
In terminal…
sudo -H vi /etc/modprobe.d/blacklist-cdc_ether.conf # create the file
Add these two lines…
blacklist cdc_ether
blacklist usbnetgeditblacklist usbnet
Save the file and reboot the computer.
Then do…
sudo lshw -C network # show us the current network devices
and confirm that the enp0s20f0u3c2 ethernet device is no longer present. If it’s still there, then do the following, but only if it’s still there…
sudo modprobe -r cdc_ether usbnet # remove these kernel modules
sudo update-initramfs -c -k "$(uname -r)" # update the initramfs
reboot the computer and check the lshw command again.
Das hat es dann hoffentlich erledigt.
