Ubuntu 18.04 Ethernet device not found (WiFi working fine)











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I am using a brand new Dell XPS 13 9370 (developer edition with Ubuntu 18.04) with Dell dock WD15 (which has a RealTek Gigabit ethernet adapter). The wired connection was working on the first day or two after set-up, but now the device is not found and only WiFi is working:



bart@bart:~$ ifconfig -a
lo: flags=73<UP,LOOPBACK,RUNNING> mtu 65536
inet 127.0.0.1 netmask 255.0.0.0
inet6 ::1 prefixlen 128 scopeid 0x10<host>
loop txqueuelen 1000 (Local Loopback)
RX packets 2796 bytes 263389 (263.3 KB)
RX errors 0 dropped 0 overruns 0 frame 0
TX packets 2796 bytes 263389 (263.3 KB)
TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0

wlp2s0: flags=4163<UP,BROADCAST,RUNNING,MULTICAST> mtu 1500
inet 10.16.60.2 netmask 255.255.192.0 broadcast 10.16.63.255
inet6 fe80::66a1:cfc:5a38:e81c prefixlen 64 scopeid 0x20<link>
ether 9c:b6:d0:92:e2:47 txqueuelen 1000 (Ethernet)
RX packets 14541 bytes 9101768 (9.1 MB)
RX errors 0 dropped 0 overruns 0 frame 0
TX packets 10748 bytes 1753428 (1.7 MB)
TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0


There are no wired internet settings available in the Ubuntu GUI either, only wireless settings...



bart@bart:~$ sudo lshw -C network
*-network
description: Wireless interface
product: QCA6174 802.11ac Wireless Network Adapter
vendor: Qualcomm Atheros
physical id: 0
bus info: pci@0000:02:00.0
logical name: wlp2s0
version: 32
serial: 9c:b6:d0:92:e2:47
width: 64 bits
clock: 33MHz
capabilities: pm msi pciexpress bus_master cap_list ethernet physical wireless
configuration: broadcast=yes driver=ath10k_pci driverversion=4.15.0-1028-oem firmware=WLAN.RM.4.4.1-00079-QCARMSWPZ-1 ip=10.16.60.2 latency=0 link=yes multicast=yes wireless=IEEE 802.11
resources: irq:134 memory:dc000000-dc1fffff


Any help would be greatly appreciated!










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    I am using a brand new Dell XPS 13 9370 (developer edition with Ubuntu 18.04) with Dell dock WD15 (which has a RealTek Gigabit ethernet adapter). The wired connection was working on the first day or two after set-up, but now the device is not found and only WiFi is working:



    bart@bart:~$ ifconfig -a
    lo: flags=73<UP,LOOPBACK,RUNNING> mtu 65536
    inet 127.0.0.1 netmask 255.0.0.0
    inet6 ::1 prefixlen 128 scopeid 0x10<host>
    loop txqueuelen 1000 (Local Loopback)
    RX packets 2796 bytes 263389 (263.3 KB)
    RX errors 0 dropped 0 overruns 0 frame 0
    TX packets 2796 bytes 263389 (263.3 KB)
    TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0

    wlp2s0: flags=4163<UP,BROADCAST,RUNNING,MULTICAST> mtu 1500
    inet 10.16.60.2 netmask 255.255.192.0 broadcast 10.16.63.255
    inet6 fe80::66a1:cfc:5a38:e81c prefixlen 64 scopeid 0x20<link>
    ether 9c:b6:d0:92:e2:47 txqueuelen 1000 (Ethernet)
    RX packets 14541 bytes 9101768 (9.1 MB)
    RX errors 0 dropped 0 overruns 0 frame 0
    TX packets 10748 bytes 1753428 (1.7 MB)
    TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0


    There are no wired internet settings available in the Ubuntu GUI either, only wireless settings...



    bart@bart:~$ sudo lshw -C network
    *-network
    description: Wireless interface
    product: QCA6174 802.11ac Wireless Network Adapter
    vendor: Qualcomm Atheros
    physical id: 0
    bus info: pci@0000:02:00.0
    logical name: wlp2s0
    version: 32
    serial: 9c:b6:d0:92:e2:47
    width: 64 bits
    clock: 33MHz
    capabilities: pm msi pciexpress bus_master cap_list ethernet physical wireless
    configuration: broadcast=yes driver=ath10k_pci driverversion=4.15.0-1028-oem firmware=WLAN.RM.4.4.1-00079-QCARMSWPZ-1 ip=10.16.60.2 latency=0 link=yes multicast=yes wireless=IEEE 802.11
    resources: irq:134 memory:dc000000-dc1fffff


    Any help would be greatly appreciated!










    share|improve this question


























      up vote
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      down vote

      favorite









      up vote
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      down vote

      favorite











      I am using a brand new Dell XPS 13 9370 (developer edition with Ubuntu 18.04) with Dell dock WD15 (which has a RealTek Gigabit ethernet adapter). The wired connection was working on the first day or two after set-up, but now the device is not found and only WiFi is working:



      bart@bart:~$ ifconfig -a
      lo: flags=73<UP,LOOPBACK,RUNNING> mtu 65536
      inet 127.0.0.1 netmask 255.0.0.0
      inet6 ::1 prefixlen 128 scopeid 0x10<host>
      loop txqueuelen 1000 (Local Loopback)
      RX packets 2796 bytes 263389 (263.3 KB)
      RX errors 0 dropped 0 overruns 0 frame 0
      TX packets 2796 bytes 263389 (263.3 KB)
      TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0

      wlp2s0: flags=4163<UP,BROADCAST,RUNNING,MULTICAST> mtu 1500
      inet 10.16.60.2 netmask 255.255.192.0 broadcast 10.16.63.255
      inet6 fe80::66a1:cfc:5a38:e81c prefixlen 64 scopeid 0x20<link>
      ether 9c:b6:d0:92:e2:47 txqueuelen 1000 (Ethernet)
      RX packets 14541 bytes 9101768 (9.1 MB)
      RX errors 0 dropped 0 overruns 0 frame 0
      TX packets 10748 bytes 1753428 (1.7 MB)
      TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0


      There are no wired internet settings available in the Ubuntu GUI either, only wireless settings...



      bart@bart:~$ sudo lshw -C network
      *-network
      description: Wireless interface
      product: QCA6174 802.11ac Wireless Network Adapter
      vendor: Qualcomm Atheros
      physical id: 0
      bus info: pci@0000:02:00.0
      logical name: wlp2s0
      version: 32
      serial: 9c:b6:d0:92:e2:47
      width: 64 bits
      clock: 33MHz
      capabilities: pm msi pciexpress bus_master cap_list ethernet physical wireless
      configuration: broadcast=yes driver=ath10k_pci driverversion=4.15.0-1028-oem firmware=WLAN.RM.4.4.1-00079-QCARMSWPZ-1 ip=10.16.60.2 latency=0 link=yes multicast=yes wireless=IEEE 802.11
      resources: irq:134 memory:dc000000-dc1fffff


      Any help would be greatly appreciated!










      share|improve this question















      I am using a brand new Dell XPS 13 9370 (developer edition with Ubuntu 18.04) with Dell dock WD15 (which has a RealTek Gigabit ethernet adapter). The wired connection was working on the first day or two after set-up, but now the device is not found and only WiFi is working:



      bart@bart:~$ ifconfig -a
      lo: flags=73<UP,LOOPBACK,RUNNING> mtu 65536
      inet 127.0.0.1 netmask 255.0.0.0
      inet6 ::1 prefixlen 128 scopeid 0x10<host>
      loop txqueuelen 1000 (Local Loopback)
      RX packets 2796 bytes 263389 (263.3 KB)
      RX errors 0 dropped 0 overruns 0 frame 0
      TX packets 2796 bytes 263389 (263.3 KB)
      TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0

      wlp2s0: flags=4163<UP,BROADCAST,RUNNING,MULTICAST> mtu 1500
      inet 10.16.60.2 netmask 255.255.192.0 broadcast 10.16.63.255
      inet6 fe80::66a1:cfc:5a38:e81c prefixlen 64 scopeid 0x20<link>
      ether 9c:b6:d0:92:e2:47 txqueuelen 1000 (Ethernet)
      RX packets 14541 bytes 9101768 (9.1 MB)
      RX errors 0 dropped 0 overruns 0 frame 0
      TX packets 10748 bytes 1753428 (1.7 MB)
      TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0


      There are no wired internet settings available in the Ubuntu GUI either, only wireless settings...



      bart@bart:~$ sudo lshw -C network
      *-network
      description: Wireless interface
      product: QCA6174 802.11ac Wireless Network Adapter
      vendor: Qualcomm Atheros
      physical id: 0
      bus info: pci@0000:02:00.0
      logical name: wlp2s0
      version: 32
      serial: 9c:b6:d0:92:e2:47
      width: 64 bits
      clock: 33MHz
      capabilities: pm msi pciexpress bus_master cap_list ethernet physical wireless
      configuration: broadcast=yes driver=ath10k_pci driverversion=4.15.0-1028-oem firmware=WLAN.RM.4.4.1-00079-QCARMSWPZ-1 ip=10.16.60.2 latency=0 link=yes multicast=yes wireless=IEEE 802.11
      resources: irq:134 memory:dc000000-dc1fffff


      Any help would be greatly appreciated!







      networking drivers internet dell ethernet






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      edited Dec 4 at 14:20

























      asked Dec 4 at 10:12









      Bart

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          The solution was to disable ehci_hcd kernel module loading by creating the following file:



          bart@bart:/etc/modprobe.d$ cat blacklist-test.conf
          blacklist ehci_hcd


          I'm not sure exactly why this works, but it fixed my problem.



          If anyone could offer an explanation or comments on side effects of this solution, I would be very grateful!






          share|improve this answer





















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            up vote
            0
            down vote













            The solution was to disable ehci_hcd kernel module loading by creating the following file:



            bart@bart:/etc/modprobe.d$ cat blacklist-test.conf
            blacklist ehci_hcd


            I'm not sure exactly why this works, but it fixed my problem.



            If anyone could offer an explanation or comments on side effects of this solution, I would be very grateful!






            share|improve this answer

























              up vote
              0
              down vote













              The solution was to disable ehci_hcd kernel module loading by creating the following file:



              bart@bart:/etc/modprobe.d$ cat blacklist-test.conf
              blacklist ehci_hcd


              I'm not sure exactly why this works, but it fixed my problem.



              If anyone could offer an explanation or comments on side effects of this solution, I would be very grateful!






              share|improve this answer























                up vote
                0
                down vote










                up vote
                0
                down vote









                The solution was to disable ehci_hcd kernel module loading by creating the following file:



                bart@bart:/etc/modprobe.d$ cat blacklist-test.conf
                blacklist ehci_hcd


                I'm not sure exactly why this works, but it fixed my problem.



                If anyone could offer an explanation or comments on side effects of this solution, I would be very grateful!






                share|improve this answer












                The solution was to disable ehci_hcd kernel module loading by creating the following file:



                bart@bart:/etc/modprobe.d$ cat blacklist-test.conf
                blacklist ehci_hcd


                I'm not sure exactly why this works, but it fixed my problem.



                If anyone could offer an explanation or comments on side effects of this solution, I would be very grateful!







                share|improve this answer












                share|improve this answer



                share|improve this answer










                answered Dec 4 at 16:10









                Bart

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