Bug 215868 - iwlwifi: AX210: ODFMA not used, cannot be configured via netlink
Summary: iwlwifi: AX210: ODFMA not used, cannot be configured via netlink
Status: NEW
Alias: None
Product: Drivers
Classification: Unclassified
Component: network-wireless-intel (show other bugs)
Hardware: All Linux
: P1 normal
Assignee: Default virtual assignee for network-wireless-intel
URL:
Keywords:
Depends on:
Blocks:
 
Reported: 2022-04-21 10:20 UTC by pkalytta
Modified: 2022-05-06 11:26 UTC (History)
1 user (show)

See Also:
Kernel Version: 5.17
Subsystem:
Regression: No
Bisected commit-id:


Attachments

Description pkalytta 2022-04-21 10:20:12 UTC
When using the AX210 in a BSS that supports 802.11ax OFDMA (either in 5 GHz or 6 GHz operation), the AX210 does not seem to negotiate OFDMA but rather only OFDM. 
At least that is what the gross bitrates that iw reports hint to. They show bitrates only possible with OFDM. 

Trying to force OFDMA usage is not possible ATM?

Netlink reports:
Error for wireless request "Set Modulation" (8B2F):
    SET failed on device wlp1s0 ; Operation not supported

Used Kernel is 5.17.0-rc8, but can be reproduced in 5.17.1 

Used iwlwifi firmware is ty-a0-gf-a0-68.ucode


Also, it seems that Monitor-Mode is not possible with the AX210 on 6 GHz channels ATM, as the self-managed regulatory information are not updated when in Monitor-Mode, only when the interface is in Managed-Mode?
Comment 1 pkalytta 2022-05-06 11:26:59 UTC
Hi,

regarding the OFDMA support, the IEEE 802.11ax Standard reqires the following:

802.11ax und Chapter 4.3.15a:

   "The main PHY features in an HE STA that are not present in VHT STA or HT STA are the following:
   — Mandatory support for DL and UL OFDMA
 [...]"

Does the AX210 (and others) not fully implement the AX-Standard?
We do not see the AX210 react to Trigger Frames from the Access Point that contain User Information fields for subcarrier selection.


Best regards,

Philipp

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