Headphone volume adjustment

Jon Nettleton jon.nettleton at gmail.com
Fri Jul 5 11:54:44 EDT 2013

On Fri, Jul 5, 2013 at 5:48 PM, Daniel Drake <dsd at laptop.org> wrote:

> Hi,
> On Fri, Jul 5, 2013 at 12:40 AM, James Cameron <quozl at laptop.org> wrote:
> > Fixed for XO-4 in:
> >
> >
> http://dev.laptop.org/git/olpc-kernel/commit/?h=arm-3.5&id=e77de3d4ec7589af2e88014018c69528ceab3293
> Thanks for looking at this.
> I'm trying to review the change. I am a bit stuck though, because I
> still don't understand the answer to the opening question on this
> thread: is this a bug or by design?
> Do I gather correctly from your initial response that it is by design
> that the headphone volume slider does not cover the full range offered
> by the hardware? That is, if I use alsamixer to set the volume as low
> as it will go, the value programmed to the hardware is not the lowest
> that the hardware can go? If that is the case, why?

Is this a by-product of a different design decision.  I think it was for
the xo-1.75 that we implemented a feature that limited the max volume of
the headphone jack.  This is actually a requirement for EU sales.  Is it a
possibility that the range got shifted in the wrong direction?

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