No Sound through headphones on an iMac

[Chris Rouch]

On 16 August 2012 23:57, Hugh Caley <hcaley at rocketsoftware.com> wrote:
> Fedora 17 on a newer iMac, the sound is pretty much inaudible with
> headphones plugged in, but the speakers seem to work fine with nothing
> plugged into the headphone jack.
>
> I've check alsamixer and the Gnome3 Sound control panel, nothing seems to be
> shut down when the headphones are plugged in.  No errors are indicated in
> the logs.  Headphone jack works fine under OSX.  Anyone have a thought as to
> how to work around this?
>

I have something similar. By default I get sound through the
headphones and not though the speakers. If I create
/etc/modprobe.d/local.conf, with contents

options snd-hda-intel model=imac27

I get the opposite - sound on the speakers but not on the headphones.
In both cases, nothing I do with alsamixer -c 0 makes any difference
to the other output.

This is on a new imac, with an up to date F17.

Regards,

Chris