====== 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.

===== Symptoms =====

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 ======

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):
<code>
[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
</code>