[Sugar-devel] Wanting to know a bit of (NetworkManager) workflow upon resume-from-suspend
ajaygargnsit at gmail.com
Wed May 2 10:18:11 EDT 2012
I managed to get this working (albeit via changes in sugar).
The details are at ::
On Wed, May 2, 2012 at 6:02 PM, Paul Fox <pgf at laptop.org> wrote:
> martin wrote:
> > On Wed, May 2, 2012 at 3:22 AM, Ajay Garg <ajaygargnsit at gmail.com>
> > > The /etc/powerd/postresume.d/disable_mesh.sh doesn't work.
> > So we need to understand why it does not work. Is it a race condition?
> > Perhaps it is better fixed as a udev script -- triggering when the
> > device appears.
> i think it's almost a guaranteed race. that script essentially
> does this:
> while [ ! -f /sys/class/net/eth0/lbs_mesh ]
> sleep 0.5
> echo 0 > /sys/class/net/eth0/lbs_mesh
> in other words -- the disable_mesh script will discover the disable
> node at just about exactly the time that NM discovers the interface.
> there's also the "lbs_disablemesh" module parameter, which could be
> supplied at initial module load. does that not work, for some reason?
> (i seem to recall there may be a problem with it.)
> > The step that disable_mesh performs is very important. If you don't
> > disable it at that level, you haven't disabled mesh at all and all the
> > problems persist.
> > >> - disable mesh on boot
> > > Done. Added the 'echo 0' script in 'start()' method of
> NetworkManager, so
> > > that the effect takes place before NetworkManager starts up. Works
> like a
> > > charm.
> > Ok. Maybe a udev script is a better place.
> > >> - disable mesh on resume, from a powerd-triggered script
> > > Does not work, as explained above.
> > Right but you MUST find a way to make it work.
> > >> - blacklist the MAC address so NM ignores it
> > >>
> > >> you win. Yes, every XO has a different MAC address, but you can read
> > >> that on first boot of the OS, and write the NM configuration. See the
> > >> olpc-configure script for examples.
> > >
> > >
> > > Would be awesome. I believe this is the one and only complete solution
> > > possible :)
> > Careful here! This only hides the device from NM so you don't race with
> > > Could you point me to the suitable (examples) link? I will be
> > > grateful.
> > look at the latest olpc-configure in git://
> > m
> > --
> > martin.langhoff at gmail.com
> > martin at laptop.org -- Software Architect - OLPC
> > - ask interesting questions
> > - don't get distracted with shiny stuff - working code first
> > - http://wiki.laptop.org/go/User:Martinlanghoff
> > _______________________________________________
> > Devel mailing list
> > Devel at lists.laptop.org
> > http://lists.laptop.org/listinfo/devel
> paul fox, pgf at laptop.org
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