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Every time I boot Kubuntu picks the wrong network controller by default

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    Every time I boot Kubuntu picks the wrong network controller by default

    I am trying to learn how to configure my system to specify which network adapter to use by default. I have a somewhat specific scenario, I have a Prism USB router that I use for VR gaming (it's a specific product that creates a discrete link between my windows desktop and my Quest 3 so that I get better performance when not tethered). It isn't supported in Linux so when I boot my PC into Kubuntu it is non-functional. Well, every single time I boot it decides that is the primary hard wired network connection and I have to manually select the real ethernet adapter on my motherboard that is plugged into my actual network.

    I tried googling for network priorities and found a way to set it, but it never seems to work for my specific scenario. No matter what I do, Kubuntu wants to use the USB adapter over my integrated ethernet on my motherboard. Anyone have any thoughts?

    Click image for larger version  Name:	image.png Views:	2 Size:	50.1 KB ID:	688482
    Attached Files
    Last edited by theyoyomaster; Yesterday, 12:57 PM.

    #2
    Please post the contents of /etc/netplan/01-network-manager-all.yaml (or similarly named file).

    You can turn off a device with a netplan entry like:

    network:
    version: 2
    ethernets:
    interface:
    activation-mode: off​

    Please Read Me

    Comment


      #3
      And state what version of Kubuntu you are using...

      Please Read Me

      Comment


        #4
        I guess I assumed you have disabled the device in System Settings > Wifi & Internet then unchecked "Connect automatically..."

        Please Read Me

        Comment


          #5
          Originally posted by oshunluvr View Post
          Please post the contents of /etc/netplan/01-network-manager-all.yaml (or similarly named file).

          You can turn off a device with a netplan entry like:

          network:
          version: 2
          ethernets:
          interface:
          activation-mode: off​

          All that's in that file is:

          network:
          version: 2
          renderer: NetworkManager


          I am on 25.04.

          The device isn't listed discretely in system settings. It treats both as "Wired" and I am yet to find a way to manage them separately.

          Comment


            #6
            What's the output of ip link

            Please Read Me

            Comment


              #7
              Originally posted by oshunluvr View Post
              What's the output of ip link
              1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN mode DEFAULT group default qlen 1000
              link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
              2: enp14s0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc fq_codel state UP mode DEFAULT group default qlen
              1000
              link/ether 10:ff:e0:87:ff:9a brd ff:ff:ff:ff:ff:ff
              altname enx10ffe087ff9a
              3: enxc8a3629c9a41: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc fq_codel state UP mode DEFAULT group defa
              ult qlen 1000
              link/ether c8:a3:62:9c:9a:41 brd ff:ff:ff:ff:ff:ff
              4: wlp13s0: <BROADCAST,MULTICAST> mtu 1500 qdisc noop state DOWN mode DEFAULT group default qlen 1000
              link/ether e8:47:3a:e7:95:a0 brd ff:ff:ff:ff:ff:ff
              altname wlxe8473ae795a0





              enp14s0​ is the correct one, enxc8a3629c9a41​ is the VR USB hub.
              Last edited by theyoyomaster; Yesterday, 02:27 PM.

              Comment


                #8
                Try editing the yaml file an add this below "renderer: NetworkManager"
                Code:
                ethernets:
                   enxc8a3629c9a41:
                      activation-mode: off​
                Restart networking or log out or reboot.

                Please Read Me

                Comment


                  #9
                  Still defaulted to the USB hub but now there is an additional copy of it available.

                  Click image for larger version

Name:	image.png
Views:	0
Size:	42.5 KB
ID:	688497

                  Comment


                    #10
                    Ok, weird. Seems netplan takes over after UDEV has defined the device. Probably going to require a custom UDEV entry for it.

                    Please Read Me

                    Comment


                      #11
                      So for someone fairly new to Linux, what exactly does that mean and how would I go about learning how to do that?

                      Comment

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