WiFi speed plummets when connecting Bluetooth devices.

[grave stratus]

Model: Legion 5 15ARP8
WiFi card: MediaTek MT7921 [bruh]

Describe the issue:
As soon as I connect any Bluetooth device, the speed of the Wi-Fi connection drops significantly. For example, when I connect wireless headphones, the speed drops several times, and even worse, up to 10 megabit, with two or more devices connected.
What I've already tried:

1. Manually updating WiFi/Bluetooth drivers - same thing.
   (https://www.elevenforum.com/t/drivers-amd-mediatek-wifi-bluetooth.11384/)
2. I've updated the AMD CPU driver from the OEM one. That's fixed things like the fans working all the time when going into sleep mode, and Windows now shuts down faster. HUGE, but that's about it.
   3. Replaced the WiFi card with an Intel AX210. Slightly better results, but still the same problem.

When did it start producing the issue:
From the start, I guess. I just didn't pay much attention because I mostly used my laptop somewhat far away from the router.

Here's a relatively easy-to-follow video of the issue I'm having.

The question is: is there a way to solve this problem without buying a new 5G router (I'm still using 2.4GHz 👴) or Wi-Fi card like Intel AX210? And if not, which one to grab first?

[west bough]

since you updated your driver and issues still persist just get a AX210

[grave stratus]

Thanks, will do. Does this magic card not suffer from this problem at all? I thought that if a Wi-Fi card also processes a Bluetooth signal, then there would be some noticeable interference.

[west bough]

Well i use an AX200 since 2 years~ and zero issues

also one question

did you update your wifi card drivers from the official website and downloaded the latest ver?

[west bough]

Looks like your card is a very problematic one. I've been seeing these issues from many other brands too

https://support.lenovo.com/ch/en/downloads/ds552327-mediatek-mt7921-wireless-lan-driver-for-windows-10-version-2004-or-later-thinkpad-l14-gen-2-types-20x5-20x6-l15-gen-2-types-20x7-20x8

Tried this?

https://www.reddit.com/r/ZephyrusG14/comments/u0622b/mediatek_mt7921_wifi_solution/
I find this funny

[grave stratus]

At first, I tried to update the drivers from Microsoft Update Catalog (https://www.catalog.update.microsoft.com/Search.aspx?q=Mediatek MT7921 ), it didn't work. Then I've done some searching in this channel and tried to update them from that forum. It didn't work either. However, I've noticed some changes. My wireless headphones are connecting automatically more often now, without any extra steps (I usually had to click through "Add new device - Confirm", or something like that).

[west bough]

Ah

[west bough]

So I've heard this version was fixing people's issues too

So if you face any issues down the run download this

I know it says ThinkPad l something but it's just a wifi card driver

[grave stratus]

Thank you, I'll try it and write back.

Nah, same thing, unfortunatelly. Either I got a faulty one, or this card is a disaster.

[west bough]

bruh

the lenovo driver?

[west bough]

or this one?

[west bough]

may i know this website?

[grave stratus]

Yep.

[grave stratus]

Sure. https://speed.cloudflare.com/

[west bough]

can you try doing this?

Go to device manager network adapters, right click and go to properties

then power management and uncheck the first

[grave stratus]

I don't have power managment options there. I guess I'll try to disable "Power saving" in Advanced tab.

[west bough]

lemme record wait

[grave stratus]

Just in case

[west bough]

ah ok

its in different place for intel

[grave stratus]

I suppose it's a little better, but still pretty much sucks.
I've found AX210 for $10, I guess I'll just grab it and hope for the best.
Thanks for your time tho, I appreciate it. Have a great day.

[west bough]

windows cant manage power well lol

these shitty wifi chips will struggle

[grave stratus]

Are they really that much cheaper than the others to be included in such lineups?

Why not just do everything right at once?

[west bough]

here's my AX200. BT OFF(image 1)
BT ON(image 2)

[west bough]

AMD Systems get this treament

Intel ones get the best treatment from Lenovo i believe

[west bough]

Speedtest shows much higher results

[west bough]

i trust speedtest more cuz it connected to a closeby server

but the website you used is connecting miles and miles away from me

[errant inlet]

uh watercress is using 2.4ghz wifi, the frequency that interferes with bluetooth. you're using 5ghz.

[west bough]

Yes but I don't think it should drop as nuch

[grave stratus]

Update with a newly installed Intel AX210, 06 (latest?) revision.
Well...Looks like it is what it is when a WiFi card is processing a 2.4GHz WiFi & Bluetooth signal.
The results are slightly better, though. Download speeds don't drop when one device is connected, and WiFi is kinda usable with more than one device connected. Upload speeds are unaffected, but I haven't noted whether this was a problem with MediaTek.

[west bough]

much better than 10mbps

[grave stratus]

Well, about twice as good, at 15-20 Mbps. Still rather subpar. But I think I would have replaced it sooner or later anyway.

I suppose I'll be saving up for a new 5/6G mesh WiFi system then.