Enable CONFIG_MT7927E for MediaTek MT7927 (Filogic 380) WiFi 7 support

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#961 1 comment 0 reactions 0 assignees View on GitHub

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Assessment

Difficulty
2/5
Estimated time
1-3 hours
Newbie friendliness
66/100
Issue type
Feature
Clarity
Mostly clear
Activity status
Quiet
Tech stack
linux
Domain
networking, operating-systems

Research direction

Start with the linux-cachyos kernel configuration and compare the existing mt7925e setting with the requested CONFIG_MT7927E=m option. Inspect drivers/net/wireless/mediatek/mt76/mt7927/ and verify the resulting build exposes the module for PCI ID 14c3:7927. Done means the relevant kernel configuration enables the driver; the documented firmware and Bluetooth limitations should remain explicit.

Written by the indexing model from the issue text.

Description

Hardware

  • Card: MediaTek MT7927 (Filogic 380) WiFi 7
  • PCI ID: 14c3:7927
  • lspci output: 6f:00.0 Network controller: MEDIATEK Corp. MT7927 802.11be 320MHz 2x2 PCIe Wireless Network Adapter [Filogic 380]
  • Kernels tested: 7.1.6-1-cachyos, 7.1.6-1-cachyos-deckify, 6.18.42-1-cachyos-lts
  • Board: ASUS (AMD Ryzen 9 9850X3D)
  • Repo: cachyos-znver4

Problem

CONFIG_MT7927E is not enabled in any current CachyOS kernel build. The card is detected on PCI but no driver binds — no wireless interface appears.

The existing mt7925e driver (which is compiled in) does not cover PCI ID 14c3:7927:

alias: pci:v000014C3d00007925sv*sd*bc*sc*i*
alias: pci:v000014C3d00000717sv*sd*bc*sc*i*

lsmod | grep mt7 shows no loaded WiFi modules by default.

Kernel Status

CONFIG_MT7927E was merged into Linux mainline in kernel 6.14. The driver lives at:

drivers/net/wireless/mediatek/mt76/mt7927/

Firmware

WiFi firmware is available in linux-firmware git (not yet in the packaged version):

  • mediatek/mt7927/WIFI_MT6639_PATCH_MCU_2_1_hdr.bin
  • mediatek/mt7927/WIFI_RAM_CODE_MT6639_2_1.bin

Bluetooth firmware (mediatek/mt7927/BT_RAM_CODE_MT6639_2_1_hdr.bin) is not yet upstream — causes continuous dmesg spam at ~500ms intervals:

bluetooth hci0: Direct firmware load for mediatek/mt7927/BT_RAM_CODE_MT6639_2_1_hdr.bin failed with error -2

Requested Change

Please enable CONFIG_MT7927E=m in the kernel config for linux-cachyos. LTS backport would be appreciated once upstream supports it.

System Info

OS: CachyOS (znver4), fresh install August 2026
Kernel: 7.1.6-1-cachyos
CPU: AMD Ryzen 9 9850X3D
lspci: 6f:00.0 0280: 14c3:7927
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