XO (88W8388) roaming issues

[Franco Miceli]

Great news!

We will be conducting some tests on 3 different sets of laptops.

I'll get back to you with the results, and any comments we might have on
the patch.

BR,


2013/4/3 Dan Williams <dcbw at redhat.com>

> 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
> > > > > "
> > > > >
> > > > >
> > > > >
> > > >
> > > >
> > >
> > >
> > >
> >
> >
>
>
>


-- 
Ing. Franco Miceli
CITS - Plan Ceibal - Investigación & Desarrollo
Av. Italia 6201 - Montevideo, Uruguay
CP: 11500
Tel: (598 2) 601 5773 int.: 2227
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