XO (88W8388) roaming issues

[Dan Williams]

On Wed, 2013-03-27 at 13:55 -0300, Franco Miceli wrote:
> Great. Will apply the patch then.

I did build the 1.1 supplicant with the patch for Fedora 18:

https://admin.fedoraproject.org/updates/FEDORA-2013-4681/wpa_supplicant-1.1-1.fc18

Dan

> Thanks.
> 
> BR,
> 
> 
> 2013/3/27 Dan Williams <dcbw at redhat.com>
> 
> > On Wed, 2013-03-27 at 12:21 -0300, Franco Miceli wrote:
> > > Great news then.
> > >
> > > We will be deploying F18 builds which include wpa_supplicant 1.0.
> >
> > I think even with 1.0 and F18 you'll want the patch I attached.
> > Actually, it's likely I'll just add the patch to the Fedora builds
> > anyway, since the upstream defaults here are pretty clearly wrong for
> > most drivers.
> >
> > Dan
> >
> > > At this instance we will test the roaming feature and see if it improves.
> > >
> > > Thanks for the info. Will report back the results.
> > >
> > > BR,
> > >
> > >
> > >
> > >
> > > 2013/3/27 Dan Williams <dcbw at redhat.com>
> > >
> > > > On Wed, 2013-03-27 at 09:37 -0300, Franco Miceli wrote:
> > > > > That could be the case, since we are using wpa
> > > > > _supplicant-0.6.8-10.fc14.i686.
> > > > >
> > > > > But from another mal exchange with you I got the impression that
> > > > wpa_supplicant
> > > > > did not take part in roaming on the XO laptop (Libertas-Thick
> > Firmware).
> > > >
> > > > I looked again at the libertas kernel driver and I believe that the
> > > > supplicant does actually control the roaming with this firmware.  Some
> > > > older hardware (orinioco, airo) does do all the roaming in firmware,
> > but
> > > > the libertas lets the supplicant control that.  Most of the rest of it
> > > > is thick-firmware style though :)
> > > >
> > > > > Can I expect changes from using wpa_supplicant with version higher
> > than
> > > > 0.7
> > > > > on the XO laptop?
> > > >
> > > > You could try to apply the following patch to the 0.7 supplicant, or
> > you
> > > > could try 1.0 or later, but even with later versions, you may need a
> > > > patch like the following.
> > > >
> > > > Dan
> > > >
> > > > ---
> > > > diff -up wpa_supplicant-0.7.3/wpa_supplicant/events.c.foo
> > > > wpa_supplicant-0.7.3/wpa_supplicant/events.c
> > > > --- wpa_supplicant-0.7.3/wpa_supplicant/events.c.foo    2012-06-12
> > > > 12:03:36.172962193 -0500
> > > > +++ wpa_supplicant-0.7.3/wpa_supplicant/events.c        2012-06-12
> > > > 12:03:51.388771973 -0500
> > > > @@ -871,16 +871,14 @@ static int wpa_supplicant_need_to_roam(s
> > > >
> > > >         min_diff = 2;
> > > >         if (current_bss->level < 0) {
> > > > -               if (current_bss->level < -85)
> > > > -                       min_diff = 1;
> > > > -               else if (current_bss->level < -80)
> > > > -                       min_diff = 2;
> > > > -               else if (current_bss->level < -75)
> > > > -                       min_diff = 3;
> > > > -               else if (current_bss->level < -70)
> > > > +               if (current_bss->level < -75)
> > > >                         min_diff = 4;
> > > > +               else if (current_bss->level < -70)
> > > > +                       min_diff = 6;
> > > > +               else if (current_bss->level < -65)
> > > > +                       min_diff = 8;
> > > >                 else
> > > > -                       min_diff = 5;
> > > > +                       min_diff = 15;
> > > >         }
> > > >         if (abs(current_bss->level - selected->level) < min_diff) {
> > > >                 wpa_printf(MSG_DEBUG, "Skip roam - too small
> > difference in
> > > > "
> > > >
> > > >
> > > >
> > >
> > >
> >
> >
> >
> 
>