I'm having the same problem. I was running Xubuntu 14.04 LTS, and the driver worked fine up through kernel 3.13.0.77 earlier this year. For later kernels, the driver would not work, but I was able to set up a default boot to kernel 3.13.0.77 so I could keep running. Now I've upgraded to Xubuntu 16.04 LTS (kernel 4.4.0.34), and it doesn't work at all. Even if I revert to kernel 3.13.0.77 it still doesn't work. Now I'm in Ubuntu 16.04 LTS (also kernel 4.4.0.34) and the Archer T4U driver doesn't work here either. I've redownloaded the source and rebuilt the driver with the makefile, but no diff. My wifi is basically dead in the water without this. Is the driver being upgraded, or do I have an obsolete piece of hardware?

OKay, I got this to work with Ubuntu 16.04 LTS (kernel 4.4.0.34). Don't download the driver from the TP-Link site. Instead go to this page:
https://github.com/abperiasamy/rtl8812AU_8821AU_linux and download the package from there.
Follow the instructions to compile and install with DKMS (you might need to install dkms with "sudo apt-get install dkms"). I rebooted my computer, and it is working now.

Randyman99, could you help me with driver installation?


I've installed Ubuntu 16.04,
downloaded https://github.com/abperiasamy/rtl8812AU_8821AU_linux
and run these commands

# sudo cp -R . /usr/src/rtl8812AU_8821AU_linux-1.0
# sudo dkms add -m rtl8812AU_8821AU_linux -v 1.0
# sudo dkms build -m rtl8812AU_8821AU_linux -v 1.0
# sudo dkms install -m rtl8812AU_8821AU_linux -v 1.0

then rebooted the system and nothing happened, do I need to run something else to get my Archer T2U working?

alexkart wrote

Randyman99, could you help me with driver installation?


I've installed Ubuntu 16.04,
downloaded https://github.com/abperiasamy/rtl8812AU_8821AU_linux
and run these commands

then rebooted the system and nothing happened, do I need to run something else to get my Archer T2U working?

Glad to help, alexcart. I'm still a bit whoozy, as I was up late last night trying to fix this again, as it broke again after the most recent kernel update from 4.4.0-34 to 4.4.0-36. I ran

[CODE]modinfo 8812au[/CODE]

Which spit out a lot of stuff about the driver (module in Linux). The top line showed this was installed to kernel 4.4.0-36-generic, but farther down was a line vermagic, which showed this was compiled with kernel 4.4.0-34-generic. So I tried running the 4 commands again, and the system complained that it was already compiled and already installed to the kernel, and wouldn't let me replace it. I tried using "sudo modprobe -r --force" but this didn't work to remove it. I finally figured out that since this module was installed with dkms, it needed to be removed with dkms. I issued the command

[CODE]sudo dkms remove -m 8812au -v 1.0 -k $(uname -r)[/CODE]

This did the trick. I also deleted the directory I copied the build package to, and started all over again. The 4 line script is now 6 lines long. This rebuilt the driver, but I still had no wifi and wasn't connected. I ran

[CODE]modinfo 8812au[/CODE]

and the vermagic line showed that it was now compiled for kernel version 4.4.0-36-generic. YEA!

I poked around a bit. I issued the commands

ifconfig wlan0 up
sudo service network-manager restart

This brought the led on the USB adapter on, but I still had no wifi connection. I finally came across the suggestion to unplug the adapter and plug it in again. I did that, and the wifi was working fine. That did it. The only caveat is that when I booted up this morning, and the wifi connected again, but the connection is not named wlan0, but something that looks like a 14 character UUID. I'll have to poke around some more and get that changed permanently. I wrote about this on the Ubuntu forum, and you can visit that page here:

http://askubuntu.com/questions/777696/xubuntu-wifi-driver-not-working-after-update/813683#813683

I hope this helps. If so, you can give me an upvote in both places to boost my noobie creds.

EDIT: I don't know how to delete the post, so I edited it. This post is irrelevant. I realized I had the T2U, not T4U.

Hi!



I had the same problem, so I tried the things mentioned here, and on the ubuntu forum as well.
I also tried installing the package (at https://github.com/abperiasamy/rtl8812AU_8821AU_linux)

this way: [CODE]sudo make -f Makefile.dkms install[/CODE]

But it didn't work for me. I didn't install it on any previous kernel though, maybe that's the problem.
I'm running Ubuntu 16.04, kernel 4.4.0-72-generic.

I tried the modinfo-command, and got this:

[CODE]modinfo 8812au
modinfo: ERROR: Module 8812au not found.[/CODE]

and also this:

[CODE]ifconfig wlan0 up
wlan0: ERROR while getting interface flags: No such device[/CODE]

any ideas? :)

Sashan, you want to download the linux driver for the T2U from here:
[URL="https://www.mediatek.com/products/broadbandWifi/mt7610u"]

Ok, thanks!