Hi!

I used the module-assistant tool to build new alsa modules including
Micah's patch. Maybe this is useful for someone, so here are the steps
involved:

sudo aptitude install module-assistant
sudo m-a update
sudo m-a prepare
sudo m-a get alsa-source
sudo m-a unpack alsa-source
cd /usr/src/modules/alsa-driver
sudo patch -p1 < /path/to/imac91-1.0.18.patch
sudo m-a build -O alsa-source
sudo m-a install alsa-source

The universe repository must be activated, then m-a should take care of
the dependancies. After the module is build, the system should be
rebooted or all alsa modules reloaded. At least the build and install
steps need to be repeated after a kernel update.

In the Gnome volume control, channel mode must be set to 6ch. Maybe you
need to change volume levels a bit, before sound is actually played. I
did not test line in or mic. I used Ubuntu 9.04.

Jonas

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New iMac (9,1, March 09) headphone jack works, speakers do not
https://bugs.launchpad.net/bugs/346170
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