Mediatek wi-fi 7921 does not work

[Blackmorse]

Following this thread: viewtopic-p-8683048.html, seems that patch mentioned there is not in 5.15 kernel,
but 5.17 does already have it: https://github.com/torvalds/linux/blob/ ... 7921/pci.c.

So I have 5.17 kernel and still are unable to make my wi-fi work

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#: uname -r
5.17.15-gentoo

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#: lspci | grep Wireless

04:00.0 Network controller: MEDIATEK Corp. MT7921 802.11ax PCI Express Wireless Network Adapter

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#: cat /etc/modules-load.d/network.conf

mt7921e

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#: dmesg | grep 7921

...
mt7921e 0000:04:00.0: Direct firmware load for mediatek/WIFI_MT7961_patch_mcu_1_2_hdr.bin failed with error -2
...

File mediatek/WIFI_MT7961_patch_mcu_1_2_hdr.bin is present at /lib/firmware/mediatek

[pietinger]

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#: dmesg | grep 7921
...
mt7921e 0000:04:00.0: Direct firmware load for mediatek/WIFI_MT7961_patch_mcu_1_2_hdr.bin failed with error -2
...

File mediatek/WIFI_MT7961_patch_mcu_1_2_hdr.bin is present at /lib/firmware/mediatek

This means: You have compiled module mt7921e STATIC into your kernel AND the firmware is NOT STATIC into your kernel => THEN the module cant load the firmware (at this time kernel has no access to its root partition). Here I gave an example how to put firmware also static into a kernel: viewtopic-t-1065464.html

Another soultion would be to compile module mt7921e as <M>odule into your kernel; then this module will be able to load its firmware at boottime (because its loaded later when kernel has access to root partition and /lib/firmware ...).

[NeddySeagoon]

Blackmorse,

Its a given that the kernel will load firmware when the module that needs it initialises.

For built in things, that's before root is mounted.
For loadable modules, that's after root is mounted.

If the first case, all the firmware the module needs must be built into the firmware, not just the

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mediatek/WIFI_MT7961_patch_mcu_1_2_hdr.bin

file that was listed in dmesg.
The kernel gives up after the first failure. If you add that, there will be another and so on, until it will work.

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/etc/modules-load.d/network.conf 

can only be consulted if the the code is a loadable module.

[Blackmorse]

Thanks all,
Making mt7921e as <M>odule did the job