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Tasklist

FS#73572 - No WiFi in MediaTek mt7921e.

Attached to Project: Arch Linux
Opened by Berin Aniesh (berinaniesh) - Monday, 31 January 2022, 05:38 GMT
Last edited by Jan Alexander Steffens (heftig) - Wednesday, 09 February 2022, 07:47 GMT
Task Type Bug Report
Category Kernel
Status Closed
Assigned To Jan Alexander Steffens (heftig)
Architecture x86_64
Severity Critical
Priority Normal
Reported Version
Due in Version Undecided
Due Date Undecided
Percent Complete 100%
Votes 6
Private No

Details

Description:

linux-zen 5.16.4.zen1-1 breaks MediaTek WiFi card (mt7921e).
This task depends upon

Closed by  Jan Alexander Steffens (heftig)
Wednesday, 09 February 2022, 07:47 GMT
Reason for closing:  Fixed
Additional comments about closing:  linux 5.16.5
Comment by Berin Aniesh (berinaniesh) - Monday, 31 January 2022, 12:31 GMT
dmesg, grepped with "mt7921e"
   dmesg.txt (5.3 KiB)
Comment by Nitin (n1729m) - Monday, 31 January 2022, 14:52 GMT
[url]https://patchwork.kernel.org/project/linux-wireless/patch/20220130075837.5270-1-felipe.contreras@gmail.com/[/url]

The above patch fixes this issue. I am using this [url]https://aur.archlinux.org/packages/linux-xanmod-rog/[/url] kernel, with the above patch included.

Wifi broke on the mt7921e chipset after 5.16.3 update and remained broken on 5.16.4.
Hope this helps.
Comment by Raphael Nestler (rnestler) - Monday, 31 January 2022, 19:18 GMT
I had the same issue with linux 5.16.3 and 5.16.4. Switching to linux-lts fixed it for me. https://bugzilla.kernel.org/show_bug.cgi?id=215391 may be related.
Comment by Magnus (DeArchDev) - Saturday, 05 February 2022, 15:15 GMT
@Berin, can you check if the patch linked by @Nitin fixes the problem?
Comment by Nitin (n1729m) - Wednesday, 09 February 2022, 06:59 GMT
WiFi works with both Arch and zen kernel on the above chipset. This bug doesn't affect latest kernels [>=v5.16.5] anymore.

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