Mediatek MT7922 uses MT7921e driver

samdavid6 · 2025-10-11 18:19:52

So I have decided to use Linux full time (I do have a dual boot Windows for emergencies), and am having issues with wifi. Basically I get a lot of lag when gaming - a problem I never had playing on Windows. Upon trying to do some investigation I see that I have a MediaTek 7922 onboard wifi, but it seems to be using an older driver. I do have the proper firmware file in /lib/firmware/mediatek but for some reason its not being used.

0f:00.0 Network controller: MEDIATEK Corp. MT7922 802.11ax PCI Express Wireless Network Adapter
	Subsystem: MEDIATEK Corp. MT7922 802.11ax PCI Express Wireless Network Adapter
	Flags: bus master, fast devsel, latency 0, IRQ 160, IOMMU group 27
	Memory at fc30300000 (64-bit, prefetchable) [size=1M]
	Memory at f6800000 (64-bit, non-prefetchable) [size=32K]
	Capabilities: <access denied>
	Kernel driver in use: mt7921e
	Kernel modules: mt7921e

And, on a side note, my bluetooth doesnt work either, even though the file is in the firmware folder.

Is there a way to set the correct firmware? I see a lot of posts, but everyone seems to just leave the 7921 driver in place just as is.

Edited to add: I did setup the bluetooth, and thats working now

Last edited by samdavid6 (2025-10-11 18:24:02)

samdavid6 · 2025-10-11 18:35:14

Update:

After some more tweaking, I followed the troubleshooting guide on the Arch wiki.

mt7921 / mt7922
There are some high latency problems with these MediaTek chipsets. To fix this, the only solution is to disable ASPM:
/etc/modprobe.d/wifi.conf
options mt7921e disable_aspm=1
This configuration file will take effect on next reboot or after reloading the module with modprobe:
# modprobe -r mt7921e && modprobe mt7921e
These are also sometimes branded as AMD RZ608 (mt7921) and RZ616 (mt7922).

My lspci -v now shows more information, mainly running it with su..

0f:00.0 Network controller: MEDIATEK Corp. MT7922 802.11ax PCI Express Wireless Network Adapter
	Subsystem: MEDIATEK Corp. MT7922 802.11ax PCI Express Wireless Network Adapter
	Flags: bus master, fast devsel, latency 0, IRQ 160, IOMMU group 27
	Memory at fc30300000 (64-bit, prefetchable) [size=1M]
	Memory at f6800000 (64-bit, non-prefetchable) [size=32K]
	Capabilities: [80] Express Endpoint, IntMsgNum 0
	Capabilities: [e0] MSI: Enable+ Count=1/32 Maskable+ 64bit+
	Capabilities: [f8] Power Management version 3
	Capabilities: [100] Vendor Specific Information: ID=1556 Rev=1 Len=008 <?>
	Capabilities: [108] Latency Tolerance Reporting
	Capabilities: [110] L1 PM Substates
	Capabilities: [200] Advanced Error Reporting
	Kernel driver in use: mt7921e
	Kernel modules: mt7921e

I'm still wondering if I should switch to the MT7922 driver instead. I can blacklist it I suppose and see if that forces the MT7922 driver.

Last edited by samdavid6 (2025-10-11 18:58:40)

seth · 2025-10-11 21:45:31

There's no "MT7922 driver" - does the original problem remain after disabling aspm?
Check

systool -vm mt7921e

to make sure the changes applied.

Is there a way to set the correct firmware?

There's a bogus firmware in the latest linux-firmware-mediatek, https://gitlab.archlinux.org/archlinux/ … /issues/29 - this is NOT related to the kernels mt7921e module.
The firmware gets loaded into the chips SRAM

I do have a dual boot Windows for emergencies

3rd link below. Mandatory.
Disable it (it's NOT the BIOS setting!) and reboot windows and linux twice for voodo reasons.

samdavid6 · 2025-10-20 20:16:00

Sorry for getting back so late (had no internet for awhile).

I tried another wifi card (NCM865) but had similar issues, so I finally gave up for now and just used ethernet. My connection is more stable now.

seth · 2025-10-20 20:55:08

If you've similar issues w/ an mt7921 and atk12k chip, it's more likely related to
- the dual-boot/fast-start situation
- power saving
- bogus software stack (concurrent services)

If you want the check this and it's not the hibernating windows, please post your complete system journal for the boot:

sudo journalctl -b | curl -F 'file=@-' 0x0.st

Arch Linux

#1 2025-10-11 18:19:52

Mediatek MT7922 uses MT7921e driver

#2 2025-10-11 18:35:14

Re: Mediatek MT7922 uses MT7921e driver

#3 2025-10-11 21:45:31

Re: Mediatek MT7922 uses MT7921e driver

#4 2025-10-20 20:16:00

Re: Mediatek MT7922 uses MT7921e driver

#5 2025-10-20 20:55:08

Re: Mediatek MT7922 uses MT7921e driver

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