[Sugar-devel] Wanting to know a bit of (NetworkManager) workflow upon resume-from-suspend

[Ajay Garg]

On Sat, May 12, 2012 at 2:08 PM, Ajay Garg <ajay at activitycentral.com> wrote:

> Thanks Martin.
> Very neatly explained !!!! :)
>
> I tried the "rmmod/modprobe" hack in "olpc-configure", and it worked
> (obviously because, this time the "/etc.modprobe.d/libertas.conf" could be
> fetched/read from persistent storage). Mesh-icons were no more visible in
> the neighborhood-view (both during reboot, and resume-from-suspend).
>
> But I too felt that this is more of a hack, and not a clean solution.
>
>
> So, I ventured out exploring dracut.
> I created a initramfs image on my home/work laptop, hosting Fedora-14, via
> the command ::
>
>                            "dracut test.img"
>
> and then listed the contents of it
>
>                            "lsinitrd test.img"
>
> I saw that "/etc/modprobe.d/*" files were a part of "test.img".
> So, I think that these files _are_ included as part of the initramfs
> image, as per say.
>
>
> So,
>
> """
> Is this observation (that /etc/modprobe.d/* files are included, as per
> say) in line with what is expected?
> If yes, that is kind of a relief, since that would mean that only
> "/etc/modprobe.d/libertas.conf" is not being included (in initramfs that
> is).
> """
>

Well, just inspected "lsinitrd olpcrd.img" (assuming "olpcrd.img" _is_ the
initramfs image in the signed build :D )
"olpcrd.img", in fact, does not contain any /etc/modprobe/* files.


Am looking into exploring customized dracut-modules-olpc..


Thanks and Regards,
Ajay



>
>
>
> Thanks and Regards,
> Ajay
>
>
>
> On Fri, May 11, 2012 at 3:33 AM, Martin Langhoff <
> martin.langhoff at gmail.com> wrote:
>
>> On Thu, May 10, 2012 at 1:23 PM, Ajay Garg <ajay at activitycentral.com>
>> wrote:
>> > If I boot with "/security/develop.sig" folder in my pendrive,
>> > a)
>> > mesh-icons are observed in neighborhood-view, both during reboot and
>> > resume-from-suspend.
>>
>> Welcome to the initramfs stage of your journey! When the laptop needs
>> activation, it loads a different initramfs that among other things
>> loads the libertas module.
>>
>> You need to get your /etc/modprobe.d/ files into the initramfs. For
>> your vanilla build, look into dracut-modules-olpc. If you're hoping to
>> get this integrated into a build with an alternative initramfs (hint:
>> Ceibal) that build will have a custom version of dracut-modules-olpc.
>>
>> That is the right way. When the laptop is in secure mode, olpc.fth is
>> _ignored_, so no chance to set a kernel cmdline there.
>>
>> An easier alternative might be to check for those flags under /sys,
>> and if they are there, rmmod/modprobe libertas  for example in
>> olpc-configure (so during early boot).
>>
>>
>>
>>
>> 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
>>
>
>
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