Fwd: [OLPC-devel] Geode GIT Tree

[Jim Gettys]

Jaya,

It wouldn't surprise me if they weren't doing the tests on the board
which had beem modified.

I'll be wandering into OLPC in a while and check, if they haven't aready
seen this by then.
                          Regards, and thanks for all your help,
                                    - Jim



On Sat, 2006-06-17 at 08:53 -0400, Jaya Kumar wrote:
> On 6/16/06, Mark J. Foster <mfoster at laptop.org> wrote:
> > Hi, Chris!
> >
> > If the mic in jack does not work with a mic, but it does work with a
> > line input, then the audio driver has probably not properly enabled the
> 
> On the OLPC board I received, no mods done, audio recording works fine
> with a standard mic (the kind you that works with regular PCs,
> unpowered, unamped).
> 
> > AD1888's external VRef output, which supplies power to the microphone.
> 
> I suspect the board where the observation was made that a standard mic
> was not working was one which had been moded for DC coupling and/or
> the AC97 VRef register had been overwritten from userspace (in debug
> mode) to perform in DC coupled mode. I think this is what Simon
> Schampijer's email states but I'm not sure so please confirm.
> 
> So I think the conclusion is that there is no problem to be fixed.
> 
> As mentioned before in the thread about audio status, I'll work on
> adding a mixer control for switching into/out of sensor mode which
> would be used together with the EC when that is ready, and the AD1888
> suspend/resume issue.
> 
> Regards,
> jaya
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-- 
Jim Gettys
One Laptop Per Child