linux-kernel - Re: [BUG] staging: r8822be: RTL8822be can't find any wireless AP

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Date:   Wed, 4 Jul 2018 08:37:41 -0500
From:   Daniel Drake <drake@...lessm.com>
To:     Dan Carpenter <dan.carpenter@...cle.com>
Cc:     Jian-Hong Pan <jian-hong@...lessm.com>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Larry Finger <Larry.Finger@...inger.net>,
        "Frank A. Cancio Bello" <frank@...eralsoftwareinc.com>,
        Stanislaw Gruszka <sgruszka@...hat.com>,
        devel@...verdev.osuosl.org, Kalle Valo <kvalo@...eaurora.org>,
        linux-wireless <linux-wireless@...r.kernel.org>,
        Linux Kernel <linux-kernel@...r.kernel.org>,
        Linux Upstreaming Team <linux@...lessm.com>,
        Colin Ian King <colin.king@...onical.com>,
        Ping-Ke Shih <pkshih@...ltek.com>,
        Arnd Bergmann <arnd@...db.de>
Subject: Re: [BUG] staging: r8822be: RTL8822be can't find any wireless AP

On Wed, Jul 4, 2018 at 8:04 AM, Dan Carpenter <dan.carpenter@...cle.com> wrote:
> I really prefer to see the whole dmesg instead of an edited ... in the
> middle.

Full log:
https://gist.github.com/dsd/20c05f0c6d66ee2ef9bfbb17f93f18ba

> I agree that it feels like the default aspm setting should be 2 (use
> what the chip says).  Although I don't know the device well enough to
> say if that will break anyone's system.  Perhaps someone who knows
> better will be able to respond.

Looking at the code for _rtl_pci_update_default_setting(), the meaning
of value 2 actually seems to be "enable ASPM on Intel platforms, and
disable on others".

But I suspect that code is not working right, because the system we
are using here is Intel-based and so my expectation would be that
value 2 leaves ASPM on and we would continue seeing the issue.
However, Jian-Hong reports it as working.

There are also some other reports that this driver doesn't work until
aspm is disabled:
https://bugzilla.redhat.com/show_bug.cgi?id=1464731#c21
https://ubuntuforums.org/showthread.php?t=2364383&page=4&p=13748721#post13748721
https://bugzilla.kernel.org/show_bug.cgi?id=199651

Daniel