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Intel AX200 horribleness

Seems like multiple people are having issues with Intel AX200 cards on Linux. There's plenty of stuff about it on the Internet, but there doesn't seem to be any well documented overarching resource about the problem.

AX201 cards are different! For now, don't include AX201 reports here. If we believe there's enough similarities regarldess of how vastly different these cards are, we'll extend reports to them, too.


We classify the following symptoms:

Name Observations
stall5g 5GHz networks work for a while, but suddenly stall - no more packets can be sent/received until reconnect/powercycle.
bork5g generic 5g breakage (connection drops, deassociations, other) which doesn't match the above specific categories
ok Everything works fine.

Data Points

Please suffix unknowns with 'ish', and try to complete them with reliable data ASAP.

Who Kernel version Firmware version AP/Infra Symptoms
q3k 5.11ish on NixOS 59.601f3a66.0 cc-a0-59.ucode hAP ac stall5g
q3k 5.10.81 on NixOS 59.601f3a66.0 cc-a0-59.ucode hAP ac ok
q3k 5.11.0-40-generic 59.601f3a66.0 cc-a0-59.ucode hAP ac stall5g
ar 5.15.3 on NixOS hAP ac ok
ar 5.15.3 on NixOS uap-ac-pro ok
implr 5.14.15-gentoo 63.c04f3485.0 cc-a0-63.ucode hAP ac lite ok
implr 5.14.15-gentoo 63.c04f3485.0 cc-a0-63.ucode generic cheap dlink ok
implr 5.14.15-gentoo 63.c04f3485.0 cc-a0-63.ucode WDR3600/openwrt 21.02.1 bork5g
implr 5.14.15-gentoo 63.c04f3485.0 cc-a0-63.ucode Orange Funbox2 ok


Machines known to have an AX200 adapter.

Machine type
Thinkpad T14 AMD

Detailed Errors

implr / wdr3600

Auth is generally successful, some traffic goes through, then deauths and wpa_supplicant roams to a different AP. dmesg (unique lines):

[141506.565441] iwlwifi 0000:03:00.0: reached 10 old SN frames from 1c:5f:2b:ca:d0:fc on queue 3, stopping BA session on TID 0
[141733.311557] wlp3s0: disconnect from AP 1c:5f:2b:ca:d0:fc for new auth to c4:6e:1f:47:6e:f5
[141733.328758] iwlwifi 0000:03:00.0: expected hw-decrypted unicast frame for station
[141733.337188] iwlwifi 0000:03:00.0: Unhandled alg: 0x71b
projects/ax200bork.txt · Last modified: 2021/12/09 16:02 by q3k

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