Serious problems with "rescan networks on wakeup" feature.

[Ixo X oxI]

One thought, to add to the mix...

How about designing the best solution for the 'deployment / school'
situation, then offering a method for users to optionally 'tweak' the
setting for their preference / situation.  Like a sugar-control-panel option
to 'show mesh enable/disable scan option'...  then a "enable scan" or
"disable scan"  will appear in 'Neighborhood View'... as selectable items
under "Mesh 1", "Mesh 6", and "Mesh 11" icons.

In a school/deployment situation, does the laptop always want to search for
Meshes... even when the student is at home?

Oh, sorry.. there were several ideas there melded into one.... :-)
-Ixo

On 3/2/08, John Watlington <wad at laptop.org> wrote:
>
>
> On Mar 2, 2008, at 7:49 PM, Thomas Tuttle wrote:
>
> > Hi.
> >
> > I just upgraded to joyride-1738, and the new feature that rescans for
> > networks when the laptop wakes up is causing a lot of trouble for
> > me.  I
> > often leave long-running connections such as IMAP or IRC open.  Before
> > the change, the laptop would wake up, the card would reassociate, and
> > there was a good chance that my connection would still be up.
> > After the
> > change, the connections are almost always dropped, even if I just
> > turned
> > the laptop off for a few seconds.
> >
> > What would be *great* is if it waited 5 or 10 seconds, tried the
> > existing connection, and then restarted scanning *if* it wasn't
> > working
> > anymore.  The lag isn't that bad, and it makes the experience where
> > you
> > just closed the laptop a minute ago and are still on the same network
> > better.
>
>
> The problem we have is the following:
>
> A student is using the laptop away from school/infrastructure, and is in
> simple mesh mode.   In this mode, all service discovery and collboration
> is multicast.    The student puts their computer to sleep (by closing
> the lid)
> and goes to school.   Once they arrive at school, the last thing we want
> is for their laptop to try to use simple mesh --- it trashes spectrum
> and makes
> the school network not work, plus they won't see any of their friends
> that
> are (properly) connected through the school presence service.
>
> If we naively followed your suggestion above, the laptop would of course
> discover that the previous network state (simple mesh) was fine, and it
> would never discover that there were centralized services available.
>
> This reply is intended to spark discussion about better fixes.
>
> For example, how about only rescan when the laptop was in simple mesh
> mode when put to sleep, or if an attempt to reestablish the existing
> connection
> fails ?
>
> wad
>
>
>
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