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eternal_sisyphus

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Registered: 2026-07-28

Posts: 1

[Kernel 7.1] MT7902 / MT7921e constant Wi-Fi drops & auth loops

[Kernel 7.1] MT7902 / MT7921e constant Wi-Fi drops & auth loops (Class 2 frame deauth / iwd BSS errors)

Hi everyone,

I am running Arch Linux on a laptop with an integrated MediaTek MT7902 PCIe wireless adapter. When i installed arch recently, i upgraded to kernel version 7.1 since native support for mt7902 was included in it; and the wifi worked out of the box till now. Now i ran a system update and upgrade and wifi started malfunctioning. The interface connects successfully for a brief period after boot or service restart, but then suffers rapid throughput degradation, drops off the network entirely, and enters an infinite re-authentication loop.

Here is a full breakdown of the system setup, configurations, and relevant log outputs.

1. SYSTEM & HARDWARE DETAILS

• Kernel: 7.1.5-arch1-1 #1 SMP PREEMPT_DYNAMIC

• Wi-Fi Adapter: MEDIATEK Corp. MT7902 802.11ax PCIe Wireless Network Adapter [Filogic 310] (PCI ID: 14c3:7902, Subsystem: AzureWave 1a3b:5520)

• Active Driver: mt7921e

• Firmware Package: linux-firmware 20260622-1

• Network Stack: NetworkManager utilizing iwd as the wireless backend (wifi.backend=iwd). wpa_supplicant is stopped and disabled.

2. HARDWARE & RFKILL STATUS

lspci -nnk output:

02:00.0 Network controller [0280]: MEDIATEK Corp. MT7902 802.11ax PCIe Wireless Network Adapter [Filogic 310] [14c3:7902]
	Subsystem: AzureWave Device [1a3b:5520]
	Kernel driver in use: mt7921e
	Kernel modules: mt7921e

rfkill list output:

0: hci0: Bluetooth: Soft blocked: no / Hard blocked: no
1: asus-wlan: Wireless LAN: Soft blocked: no / Hard blocked: no
2: asus-bluetooth: Bluetooth: Soft blocked: no / Hard blocked: no
3: phy0: Wireless LAN: Soft blocked: no / Hard blocked: no

3. CONFIGURATION FILES

/etc/NetworkManager/conf.d/default-wifi-powersave-on.conf:

[connection]
wifi.powersave = 2

/etc/iwd/main.conf:

[General]
EnableNetworkConfiguration=false

[Settings]
AddressRandomization=network

[Scan]
DisablePeriodicScan=true

[Rank]
BandModifier5GHz=1.5

/etc/modprobe.d/mt76.conf:

options mt76 disable_aspm=1
options mt7921e disable_aspm=Y disable_rpm=1

4. DETAILED LOG OUTPUTS

A. Kernel Boot / Driver Initialization (dmesg)
Notice that the driver actively rejects the modprobe parameters, and a regulatory database failure occurs on boot:

[Tue Jul 28 09:40:14 2026] faux_driver regulatory: Direct firmware load for regulatory.db failed with error -2
[Tue Jul 28 09:40:14 2026] mt76: unknown parameter 'disable_aspm' ignored
[Tue Jul 28 09:40:14 2026] mt7921e: unknown parameter 'disable_rpm' ignored
[Tue Jul 28 09:40:14 2026] mt7921e 0000:02:00.0: disabling ASPM  L1
[Tue Jul 28 09:40:14 2026] mt7921e 0000:02:00.0: ASIC revision: 79020000
[Tue Jul 28 09:40:15 2026] mt7921e 0000:02:00.0: HW/SW Version: 0x8a108a10, Build Time: 20251212032046a
[Tue Jul 28 09:40:15 2026] mt7921e 0000:02:00.0: WM Firmware Version: ____000000, Build Time: 20251212032127

B. Authentication Handshake Timeouts & Class 2 Deauth Loops (dmesg)
The card repeatedly fails Layer 2 802.11 authentication and gets deauthenticated by the access point:

[Tue Jul 28 09:42:09 2026] wlan0: deauthenticated from 76:21:b8:19:b5:ba (Reason: 6=CLASS2_FRAME_FROM_NONAUTH_STA)
[Tue Jul 28 09:42:10 2026] wlan0: authenticate with 76:21:b8:19:b5:ba (local address=cc:47:40:60:13:be)
[Tue Jul 28 09:42:10 2026] wlan0: send auth to 76:21:b8:19:b5:ba (try 1/3)
[Tue Jul 28 09:42:11 2026] wlan0: send auth to 76:21:b8:19:b5:ba (try 2/3)
[Tue Jul 28 09:42:12 2026] wlan0: send auth to 76:21:b8:19:b5:ba (try 3/3)
[Tue Jul 28 09:42:13 2026] wlan0: authentication with 76:21:b8:19:b5:ba timed out
[Tue Jul 28 09:42:16 2026] wlan0: authenticate with 76:21:b8:19:b5:ba (local address=cc:47:40:60:13:be)
[Tue Jul 28 09:42:16 2026] wlan0: send auth to 76:21:b8:19:b5:ba (try 1/3)
[Tue Jul 28 09:42:17 2026] wlan0: send auth to 76:21:b8:19:b5:ba (try 2/3)
[Tue Jul 28 09:42:18 2026] wlan0: send auth to 76:21:b8:19:b5:ba (try 3/3)
[Tue Jul 28 09:42:19 2026] wlan0: authentication with 76:21:b8:19:b5:ba timed out
[Tue Jul 28 09:42:31 2026] wlan0: authenticate with 76:21:b8:19:b5:ba (local address=cc:47:40:60:13:be)
[Tue Jul 28 09:42:31 2026] wlan0: send auth to 76:21:b8:19:b5:ba (try 1/3)
[Tue Jul 28 09:42:32 2026] wlan0: send auth to 76:21:b8:19:b5:ba (try 2/3)
[Tue Jul 28 09:42:33 2026] wlan0: send auth to 76:21:b8:19:b5:ba (try 3/3)
[Tue Jul 28 09:42:34 2026] wlan0: authentication with 76:21:b8:19:b5:ba timed out

C. Wireless Daemon Logs (iwd)
iwd fails during the connection sequence reporting that the active BSS drops out of scan results mid-handshake:

Jul 28 10:24:56 Sisyphus iwd[14137]: event: connect-info, ssid: Galaxy M12F4E2, bss: 76:21:b8:19:b5:ba, signal: -60, load: 0/255
Jul 28 10:24:56 Sisyphus iwd[14137]: event: state, old: autoconnect_quick, new: connecting (auto)
Jul 28 10:24:59 Sisyphus iwd[14137]: event: connect-timeout, reason: 2
Jul 28 10:24:59 Sisyphus iwd[14137]: event: connect-failed, status: 1
Jul 28 10:25:03 Sisyphus iwd[14137]: event: connect-info, ssid: Galaxy M12F4E2, bss: 76:21:b8:19:b5:ba, signal: -60, load: 0/255
Jul 28 10:25:03 Sisyphus iwd[14137]: event: state, old: autoconnect_full, new: connecting
Jul 28 10:25:04 Sisyphus iwd[14137]: Connected BSS not in scan results
Jul 28 10:25:07 Sisyphus iwd[14137]: event: connect-timeout, reason: 2
Jul 28 10:25:07 Sisyphus iwd[14137]: event: connect-failed, status: 1
Jul 28 10:25:36 Sisyphus iwd[14137]: event: connect-info, ssid: Galaxy M12F4E2, bss: 76:21:b8:19:b5:ba, signal: -63, load: 0/255
Jul 28 10:25:36 Sisyphus iwd[14137]: event: state, old: autoconnect_full, new: connecting
Jul 28 10:25:36 Sisyphus iwd[14137]: Connected BSS not in scan results
Jul 28 10:25:39 Sisyphus iwd[14137]: event: connect-timeout, reason: 2

D. NetworkManager Platform Warnings
NetworkManager journal also shows continuous IPv6 platform configuration failures on the wlan0 interface:

Jul 28 10:44:55 Sisyphus NetworkManager[14165]: <warn>  [1785215695.8073] platform-linux: do-add-ip6-address[8: fe80::12bd:8f2d:ea37:1bf7]: failure 13 (Permission denied - ipv6: IPv6 is disabled on this device)
Jul 28 10:45:01 Sisyphus NetworkManager[14165]: <warn>  [1785215701.8135] ipv6ll[0b99c65933b03578,ifindex=8]: changed: no IPv6 link local address to retry after Duplicate Address Detection failures (back off)

5. SUMMARY OF TROUBLESHOOTING TRIED

1. Disabled NetworkManager Wi-Fi Power Saving via wifi.powersave = 2.

2. Switched backend from wpa_supplicant to iwd.

3. Cleared iwd state directory (/var/lib/iwd/*) and recreated network profiles.

4. Attempted module options (disable_aspm and disable_rpm), though dmesg confirms these flags are not valid options in the kernel 7.1 mt7921e module.

Since native support for the MT7902 was merged into the mainline 7.1 kernel series, is this a recognized driver/firmware regression with the mt7921e module, or is there an alternative parameter or regulatory fix needed to prevent frame drops during association?

Thanks for any help!

Last edited by eternal_sisyphus (2026-07-28 06:33:09)