No ethernet - 17.04 - Dell 3000 dock

[banderson5586]

I updated to the latest driver, upgraded to 4.12 kernel and fixed the bugs to get external displays working but for some reason the ethernet adapter on the dock is not recognized. Any ideas?

Dell XPS 12
Dell D3000 Dock
Ubuntu 17.04
4.12.0-041200-generic

Thanks

[mlukaszek]

The ethernet functionality is handled by upstream kernel cdc_ncm driver, do you see any signs of things going wrong in your dmesg log?

Cheers,
Michal

[banderson5586]

Doesn't look like anything is wrong.

[ 4405.503291] cdc_ncm 4-1.3:1.5: MAC-Address: 00:24:9b:0b:2e:ee
[ 4405.503298] cdc_ncm 4-1.3:1.5: setting rx_max = 16384
[ 4405.503416] cdc_ncm 4-1.3:1.5: setting tx_max = 16384
[ 4405.503667] cdc_ncm 4-1.3:1.5 usb0: register 'cdc_ncm' at usb-0000:00:14.0-1.3, CDC NCM, 00:24:9b:0b:2e:ee
[ 4405.539683] cdc_ncm 4-1.3:1.5 enx00249b0b2eee: renamed from usb0
[ 4408.496162] cdc_ncm 4-1.3:1.5 enx00249b0b2eee: unregister 'cdc_ncm' usb-0000:00:14.0-1.3, CDC NCM
[ 4409.088746] cdc_ncm 4-1.3:1.5: MAC-Address: 00:24:9b:0b:2e:ee
[ 4409.088749] cdc_ncm 4-1.3:1.5: setting rx_max = 16384
[ 4409.088886] cdc_ncm 4-1.3:1.5: setting tx_max = 16384
[ 4409.089184] cdc_ncm 4-1.3:1.5 usb0: register 'cdc_ncm' at usb-0000:00:14.0-1.3, CDC NCM, 00:24:9b:0b:2e:ee
[ 4409.115858] cdc_ncm 4-1.3:1.5 enx00249b0b2eee: renamed from usb0


When it was working the eth interface was named "usb0" so this looks normal except the interface isn't present.

[mlukaszek]

Well judging from the log, the interface has been renamed from usb0 to enx00249b0b2eee. What does 'ip a' show?

Cheers,
Michal

[banderson5586]

You're right, it shows up there and in ifconfig when i use -a. Not a displaylink issue. Thanks,.

[banderson5586]

Found the fix here in case anyone has the same issue:

https://askubuntu.com/questions/906636/ethernet-adapter-was-disable-on-ubuntu-17-04