linux-kernel - Re: [regression] Bug 216753 - 6e 6 ghz bands are disabled since 5.16 on intel ax211

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Message-ID: <19ea39c87df3c54cbc487466f806bc157d0bf563.camel@freebox.fr>
Date:   Fri, 02 Dec 2022 18:42:13 +0100
From:   Maxime Bizon <mbizon@...ebox.fr>
To:     Dave Chiluk <chiluk@...ntu.com>,
        Marcel Holtmann <marcel@...tmann.org>
Cc:     Thorsten Leemhuis <regressions@...mhuis.info>,
        "Coelho, Luciano" <luciano.coelho@...el.com>,
        "Greenman, Gregory" <gregory.greenman@...el.com>,
        "linux-wireless@...r.kernel.org" <linux-wireless@...r.kernel.org>,
        Johannes Berg <johannes@...solutions.net>,
        "regressions@...ts.linux.dev" <regressions@...ts.linux.dev>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: Re: [regression] Bug 216753 - 6e 6 ghz bands are disabled since
 5.16 on intel ax211


On Fri, 2022-12-02 at 11:18 -0600, Dave Chiluk wrote:

Hello,

> The 6ghz band becomes disabled as soon as I upgrade to the 5.16+
> linux-stable kernels. So from a user perspective this really is a
> case of a kernel upgrade breaking user-space.  This is what led me
> down this rabbit hole here.
 
FWIW

I have the same issue on a Lenovo T14 gen2 laptop with built-in ax210
card, and sold as Wifi-6E compliant.

The exact patch you mention causes the issue, so it seems my bios does
not return the correct values either.

I recompiled the kernel with all those cmd_allow_xxx bitmaps set to ~0
and 6Ghz works fine.

-- 
Maxime