Re: iwlwifi: 8265: unexpected LLC packets TX'ed in monitor mode

["Marco" <marco@tampabay.rr.com>]

On Mon May 25, 2020 at 7:23 AM EDT, Johannes Berg wrote:
> On Wed, 2020-05-13 at 13:48 -0400, Marco Fonseca wrote:
> > Hello,
> > 
> > While in monitor mode, the 8265 will periodically transmit gratuitous
> > LLC packets.  In this mode, I would expect the wifi chipset to not
> > transmit any packets at all (unless packet injection is being used).
> > 
> > This behavior can be observed by a second wifi device in monitor mode.
> > A display filter on wireshark/tshark of 'llc' makes these easy to spot.
> > 
> > It seems these packets only get produced in presence of a few APs
> > and/or STAs but I'm not sure of the exact cause.  I don't see the LLC
> > packets on very quiet channels.
>
> I think these are somehow related to calibrations in the device.
>
> johannes

Are you perhaps implying that I can alter calibration settings to fix
this problem?  If you have any pointers to this it would be
appreciative.

Regardless though, I would still expect the default behavior to not
emit packets when in monitor mode, unless the user directs it to;
similar to what I've seen from other wifi chipsets.

Marco