On 1/13/22 11:12 AM, Ben Greear wrote:
On 1/11/22 11:46 AM, Brandon Nielsen wrote:
On 1/8/22 3:22 PM, Ben Greear wrote:
On 1/8/22 12:50 PM, Brandon Nielsen wrote:
I have a system with Intel AX201 not using 2 spatial streams in the
RX (download) direction. TX (upload) functions as expected. I'm
seeing similar behavior with an AX200 system. I'm seeing the same
behavior on 5.15.12 as I am with 5.16.0-rc8 so I didn't mark it as a
regression. Windows works as expected.
I have opened bug 215465[0] with some more detail.
[0] - https://bugzilla.kernel.org/show_bug.cgi?id=215465
We saw something similar with ax210, but only on 6E, in kernel
5.15.7+. On 5Ghz, it worked 2x2 as expected.
On a 5.15.0-rc something, it worked OK for us.
We verified same firmware is used in both cases, but have not fully
bisected the problem yet but we are
working on it. In case you find the problem patch before us, please
let me know!
Thanks,
Ben
I'm still seeing this as far back as 5.11.12, so I'm not convinced
this is a regression. At least for the 5 GHz / 802.11ac case.
Our engineer Chuck Rekierre bisected the problem we saw to a patch that
came in as part of a stable patch.
Please see his revert patch: [PATCH] Revert "iwlwifi: mvm: disable
RX-diversity in powersave"
posted yesterday, and if you get a chance to test this, please let us
know the results.
Thanks,
Ben
Just tried it on one of the AX200 systems exhibiting the issue. No
change. Rock solid MCS 9, but no engagement of the second RX stream.
