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I have two Ethernet connections on my Ubuntu 18.04 desktop:

  • PCI ... wired Ethernet connected to the main network
  • USB ... wired Ethernet connected to a switch and a local device

After rebooting, Ubuntu always tries to connect to a network via the USB connection which fails. It leaves the PCI connection disabled.

To connect to a network, I need to manually click on Settings -> PCI -> Connect which resolves the issue immediately.

I changed Network settings to no avail. Found similar questions here and here but it also did not help.

How can I ensure that after rebooting, Ubuntu 18.04 connects using PCI Ethernet connection and not using the USB Ethernet connection? I'd like to leave the USB connection enabled if possible.

Petr Vepřek
  • 111

1 Answers1

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In terminal, type nm-connection-editor, and select the profile for your PCI ethernet card, then change the "Connect automatically with priority" to 1, and confirm that the profile for the USB ethernet is set to 0.

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Update #1:

You can set the MAC address here...

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heynnema
  • 73,649