Arch Linux

ArchArrow

Member

Registered: 2017-02-15

Posts: 26

TP-Link Archer T2UH AC600 with MediaTek MT7610U chipset not recognized

Hello.

I just bought a TP-Link Archer T2UH AC600 with a MediaTek MT7610U chipset because it should be supported by the kernel 4.19+.

Source: https://wireless.wiki.kernel.org/en/use … s/mediatek

So when I look for it with lsusb it is definitely there:

Bus 001 Device 002: ID 148f:761a Ralink Technology, Corp. MT7610U ("Archer T2U" 2.4G+5G WLAN Adapter

This is my uname-a:

4.20.5-arch1-1-ARCH #1 SMP PREEMPT Sat Jan 26 12:59:18 UTC 2019 x86_64 GNU/Linux

This is my dmesg output:

[    1.580470] usb 1-8: New USB device found, idVendor=148f, idProduct=761a, bcdDevice= 1.00
[    1.580471] usb 1-8: New USB device strings: Mfr=1, Product=2, SerialNumber=3
[    1.580473] usb 1-8: Product: WiFi
[    1.580474] usb 1-8: Manufacturer: MediaTek
[    1.580475] usb 1-8: SerialNumber: 1.0

There are 2 problems:

1. The status LED doesn't even light up. I tried it on the same system in my dual-booted Windows and it works flawlessly.
2. It obviously doesn't show up in gnome-settings/NetworkManager

If it is supported by the kernel should it not work automatically? It's obviously correctly detected by the kernel, but still the LED doesn't even light up. What could be the cause of this? Does anyone have any idea? If you need more infos, just tell me what you need to know/what I need to run and I will let you guys know.

Thanks so much in advance!

loqs

Member

Registered: 2014-03-06

Posts: 17,310

Re: TP-Link Archer T2UH AC600 with MediaTek MT7610U chipset not recognized

What is the full output of dmesg and the output of `ip l`?

ArchArrow

Member

Registered: 2017-02-15

Posts: 26

Re: TP-Link Archer T2UH AC600 with MediaTek MT7610U chipset not recognized

So I did a little more digging and I found a dmesg error saying ""firmware upload timed out". So I researched this and it seems to happen with Ryzen systems. It was suggested to turn IOMMU off. So I added

amd_iommu=off

to my systemd-boot options, rebooted and it now works!

So far so good. However what I don't quite understand is:

1. What does my CPU have to do with my wifi stick?
2. Are there any disadvantages with disabling IOMMU for my system?
3. I'm about to reinstall my entire Arch system and I'll obviously need wifi for this. How can I disable IOMMU for the arch installation ISO/usb image?

Last edited by ArchArrow (2019-01-29 17:20:50)

loqs

Member

Registered: 2014-03-06

Posts: 17,310

Re: TP-Link Archer T2UH AC600 with MediaTek MT7610U chipset not recognized

2. https://en.wikipedia.org/wiki/Input%E2% … ement_unit
3. See Kernel_parameters#Configuration first note.

Lone_Wolf

Member

From: Netherlands, Europe

Registered: 2005-10-04

Posts: 11,911

Re: TP-Link Archer T2UH AC600 with MediaTek MT7610U chipset not recognized

2. Are there any disadvantages with disabling IOMMU for my system? 

That depends on your hardware and drivers .
On most systems hardware / drivers that expect full 64-bit support including the ability to decode addresses above 4g will suffer if iommu is completely disabled.
For a 32 bit system however iommu tends not to make any difference.

Disabling iommu should be seen as a temporary workaround.
please post your full dmesg.

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Disliking systemd intensely, but not satisfied with alternatives so focusing on taming systemd.

(A works at time B)  && (time C > time B ) ≠  (A works at time C)

progandy

Member

Registered: 2012-05-17

Posts: 5,190

Re: TP-Link Archer T2UH AC600 with MediaTek MT7610U chipset not recognized

You can try linux-lts 4.19
https://bugzilla.kernel.org/show_bug.cgi?id=202243#c2

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ArchArrow

Member

Registered: 2017-02-15

Posts: 26

Re: TP-Link Archer T2UH AC600 with MediaTek MT7610U chipset not recognized

Alright, looks like the kernel guys are already working on it. I will keep the amd_iommu=off fix for now and report back when kernel 5.0 has been released. Thanks for all your help guys!

davidhaller

Member

From: Erlangen

Registered: 2019-02-26

Posts: 3

Website

Re: TP-Link Archer T2UH AC600 with MediaTek MT7610U chipset not recognized

Hey guys,

it seems that I've got the same wifi adapter with the same chipset and USB ID. With linux-lts 4.19, it works out of the box, but with 5.0 I have the same problems like ArchArrow had with 4.20.

Adding amd_iommu=off to the kernel command line did not solve the issue with 5.0. Instead, it had the effect that my keyboard and mouse were no longer detected, so I could not even login. I am not using a Ryzen/Zen CPU, but one from the previous generation (AMD FX-8300 with an AM3+ mainboard).

As sticking around with linux-lts 4.19 doesn't bother me, I consider this problem solved for me, but maybe some other user will find this information helpful.

davidhaller

Member

From: Erlangen

Registered: 2019-02-26

Posts: 3

Website

Re: TP-Link Archer T2UH AC600 with MediaTek MT7610U chipset not recognized

Update: My wifi adapter works now since Kernel 5.0.5, without further configuration. All hail to the Kernel developers :-)

aitor2207

Member

Registered: 2020-10-04

Posts: 1

Re: TP-Link Archer T2UH AC600 with MediaTek MT7610U chipset not recognized

Hey folks,

I can confirm that TP-Link Archer T2UH AC60 it's working fine on Kernel 5.0.0-arch1-1-ARCH

Last edited by aitor2207 (2020-10-04 15:48:22)

HalosGhost

Forum Moderator

From: Twin Cities, MN

Registered: 2012-06-22

Posts: 2,092

Website

Re: TP-Link Archer T2UH AC600 with MediaTek MT7610U chipset not recognized

Hey folks,

I can confirm that TP-Link Archer T2UH AC60 it's working fine on Kernel 5.0.0-arch1-1-ARCH

Welcome to the BBS. In the code of conduct you agreed to when you registered today, you read a section that mentioned necrobumping as being against our community's guidelines. Please go back and reread the Code of Conduct in-full before your next post.

Closing.

All the best,

-HG

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