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Date: Thu, 6 Sep 2018 11:32:14 +0200
From: Stanislaw Gruszka <sgruszka@redhat.com>
To: Sid Hayn <sidhayn@gmail.com>
Cc: Lorenzo Bianconi <lorenzo.bianconi@redhat.com>,
        linux-wireless <linux-wireless@vger.kernel.org>,
        Felix Fietkau <nbd@nbd.name>,
        linux-mediatek@lists.infradead.org
Subject: Re: mt76x0 bug report
Message-ID: <20180906093213.GB16539@redhat.com> (sfid-20180906_113221_002484_9BB980F0)
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On Wed, Sep 05, 2018 at 08:52:18PM +0000, Sid Hayn wrote:
> On Tue, Sep 4, 2018 at 5:11 PM Lorenzo Bianconi
> <lorenzo.bianconi@redhat.com> wrote:
> >
> > >
> > > I have one mt76x2u (Alfa AWUS036ACM) and a few mt76x0.
> > >
> > > I've noticed two additional issues in my testing.
> > >
> > > First issue, is that it appears the mt76x0 devices don't work properly
> > > in monitor mode.  Sometimes they seem to monitor one channel properly,
> > > but nothing else.  The mt76x2u works great, channel control, lots of
> > > packets, etc.
> >
> > Could you elaborate a little bit please? how can you reproduce the issue?
> > just add an interface in monitor mode and run a scan?
> 
> Correct, standard stuff, use iw to create a monitor mode interface,
> use iw to remove managed mode interface, run some tool such as kismet
> or airodump-ng or even wireshark.

But what exactly are the syptomps, I don't understand what you mean by
"mt76x0 devices don't work properly in monitor mode" ?

> > I guess it depends on eeprom values. Could you please enable debug
> > messages a paste
> > syslog output?
> 
> I don't see a mediatek specific debug near the driver selection in
> menuconfig, what debug messages do you want me to enable and how?

You need to uncomment this line:

# ccflags-y := -DDEBUG

in drivers/net/wireless/mediatek/mt76/mt76x0/Makefile

Thanks
Stanislaw