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Thread: ubuntu 18.04 wireless adapter not found on TP Link Archer T4U

  1. #1
    Join Date
    Aug 2018
    Beans
    3

    ubuntu 18.04 wireless adapter not found on TP Link Archer T4U

    Hi,

    Every time I get a system update. Sometimes my wireless adapter doesn't work. It is a TP Link Archer T4U. I've tried other things but still not working here is the lshw -c network:

    root@rick-System-Product-Name:~# lshw -c network
    *-network
    description: Ethernet interface
    product: RTL8111/8168/8411 PCI Express Gigabit Ethernet Controller
    vendor: Realtek Semiconductor Co., Ltd.
    physical id: 0
    bus info: pci@0000:02:00.0
    logical name: enp2s0
    version: 03
    serial: 20:cf:30:5e:70:22
    size: 1Gbit/s
    capacity: 1Gbit/s
    width: 64 bits
    clock: 33MHz
    capabilities: pm msi pciexpress msix vpd bus_master cap_list rom ethernet physical tp mii 10bt 10bt-fd 100bt 100bt-fd 1000bt 1000bt-fd autonegotiation
    configuration: autonegotiation=on broadcast=yes driver=r8169 driverversion=2.3LK-NAPI duplex=full firmware=rtl_nic/rtl8168d-2.fw ip=192.168.1.62 latency=0 link=yes multicast=yes port=MII speed=1Gbit/s
    resources: irq:18 ioport:e800(size=256) memory:fdfff000-fdffffff memory:fdff8000-fdffbfff memory:febf0000-febfffff


    and the ifconfig:

    # ifconfig
    enp2s0: flags=4163<UP,BROADCAST,RUNNING,MULTICAST> mtu 1500
    inet 192.168.1.62 netmask 255.255.255.0 broadcast 192.168.1.255
    inet6 fe80::22cf:30ff:fe5e:7022 prefixlen 64 scopeid 0x20<link>
    ether 20:cf:30:5e:70:22 txqueuelen 1000 (Ethernet)
    RX packets 24506 bytes 20891292 (20.8 MB)
    RX errors 0 dropped 0 overruns 0 frame 0
    TX packets 18940 bytes 2704797 (2.7 MB)
    TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0

    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 3631 bytes 318587 (318.5 KB)
    RX errors 0 dropped 0 overruns 0 frame 0
    TX packets 3631 bytes 318587 (318.5 KB)
    TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0

    if anything else you need please tell me.

    Thank you in advance.

  2. #2
    Join Date
    Aug 2005
    Location
    South Carolina, USA
    Beans
    25,129
    Distro
    Ubuntu 19.10 Eoan Ermine

    Re: ubuntu 18.04 wireless adapter not found on TP Link Archer T4U

    Please run and post:
    Code:
    lsusb
    Thanks.
    "Oh, Ubuntu, you are my favorite Linux-based operating system" --Dr. Sheldon Cooper, Ph.D., Sc.D.

  3. #3
    Join Date
    Aug 2018
    Beans
    3

    Re: ubuntu 18.04 wireless adapter not found on TP Link Archer T4U

    and the iw config:

    # iwconfig
    enp2s0 no wireless extensions.

    lo no wireless extensions.

    lsusb is:

    # lsusb
    Bus 007 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
    Bus 002 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
    Bus 006 Device 002: ID 046d:c52f Logitech, Inc. Unifying Receiver
    Bus 006 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
    Bus 005 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
    Bus 001 Device 003: ID 2357:0101
    Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
    Bus 004 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
    Bus 003 Device 002: ID 413c:2101 Dell Computer Corp. SmartCard Reader Keyboard
    Bus 003 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub

    lsusb

    Bus 007 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
    Bus 002 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
    Bus 006 Device 002: ID 046d:c52f Logitech, Inc. Unifying Receiver
    Bus 006 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
    Bus 005 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
    Bus 001 Device 003: ID 2357:0101
    Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
    Bus 004 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
    Bus 003 Device 002: ID 413c:2101 Dell Computer Corp. SmartCard Reader Keyboard
    Bus 003 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
    Last edited by howefield; February 27th, 2019 at 10:44 AM. Reason: posts merged.

  4. #4
    Join Date
    Aug 2005
    Location
    South Carolina, USA
    Beans
    25,129
    Distro
    Ubuntu 19.10 Eoan Ermine

    Re: ubuntu 18.04 wireless adapter not found on TP Link Archer T4U

    With a temporary working internet connection, open a terminal and do:
    Code:
    sudo apt update
    sudo apt install rtl8812au-dkms
    Reboot and enjoy!
    "Oh, Ubuntu, you are my favorite Linux-based operating system" --Dr. Sheldon Cooper, Ph.D., Sc.D.

  5. #5
    Join Date
    Aug 2018
    Beans
    3

    Re: ubuntu 18.04 wireless adapter not found on TP Link Archer T4U

    You're the man thank you sir. Is there a fix for this or will it be coming out soon?

  6. #6
    Join Date
    Aug 2005
    Location
    South Carolina, USA
    Beans
    25,129
    Distro
    Ubuntu 19.10 Eoan Ermine

    Re: ubuntu 18.04 wireless adapter not found on TP Link Archer T4U

    Quote Originally Posted by rckmtsn View Post
    You're the man thank you sir. Is there a fix for this or will it be coming out soon?
    Errrmm, I think you just applied the fix. I assume that the correct driver rtl8812au will make it into the mainstream kernel at some early point. In the meantime, the dkms process will rebuild the driver for you automagically every time Update Manager offers a later kernel version.

    Please use thread tools at the top to mark Solved. The searchers will appreciate it.
    "Oh, Ubuntu, you are my favorite Linux-based operating system" --Dr. Sheldon Cooper, Ph.D., Sc.D.

  7. #7
    Join Date
    Aug 2013
    Beans
    16

    Re: ubuntu 18.04 wireless adapter not found on TP Link Archer T4U

    Quote Originally Posted by chili555 View Post
    With a temporary working internet connection, open a terminal and do:
    Code:
    sudo apt update
    sudo apt install rtl8812au-dkms
    Reboot and enjoy!

    This is what worked for me. I could not get the original build files to compile without errors since upgrading to 18.04, but I'm up and running again with this. Luckily, I have and old wifi router in bridge mode connected to my wired NIC for backup.

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