Fedora 14: sound not working on iMac 27

[nicku]

Dear Folks,

I made the mistake of buying my wife and son an iMac 27 inch each. They are running Fedora 14.
I have only been able to get sound working by using Pulseaudio over the network. I would like to be
able to have sound work on the machines. My post to the Fedora User's list (http://permalink.gmane.org/gmane.linux.redhat.fedora.general/392683) has no responses. My searches for the topic reveal only my questions. Am I the only one trying to get Fedora running on an iMac 27 inch?

Any ideas/bug reports/thoughts/suggestions welcome, particularly from those who actually have experience with Fedora on an iMac 27 inch.

[oldcpu]

Any ideas/bug reports/thoughts/suggestions welcome, particularly from those who actually have experience with Fedora on an iMac 27 inch.

I don't have experience with Fedora on an iMac 27 inch.

It might be possible for you to provide a bit more information to users trying to help if you could run the following diagnostic script with your iMac connected to the Internet:
/usr/bin/alsa-info.sh
and select the SHARE/UPLOAD option. It will copy your iMac's audio hardware/software configuration to an alsa site and give you a URL/webaddress where that is located. Please post that webaddress where (and it will tell the users on this thread more information so that they may be able to help).

You also could install the application 'pavucontrol' and run that application on your iMac when trying to configure your sound. It typically provides more user friendly control in pulse over your audio devices.

[nicku]

I have finally succeeded.
I posted my progress in the Fedora users mailing list.
Here are the essential points:

I added this line to /etc/modprobe.d/local.conf:
options snd-hda-intel model=imac27
I ran
alsamixer -c0
and unmuted *all* the outputs, including surround sound, and saved the results with
sudo alsactl store 0

[oldcpu]

I have finally succeeded.
I posted my progress in the Fedora users mailing list.
Here are the essential points:

I added this line to /etc/modprobe.d/local.conf:
options snd-hda-intel model=imac27
I ran
alsamixer -c0
and unmuted *all* the outputs, including surround sound, and saved the results with
sudo alsactl store 0


Well done and thanks for sharing your solution.

I note this in the alsa documentation for the HD-Audio-Models.txt file:

Cirrus Logic CS4206/4207
========================
mbp55 MacBook Pro 5,5
imac27 IMac 27 Inch
auto BIOS setup (default)

Where it appears your iMac27 has the Cirrus Logic CS4206/4207 hardware audio codec and clearly the "imac27" was the correct model option for you. The diagnostic script 'alsa-info.sh' would have told us your iMac27 has the Cirrus Logic CS4206/4207 hardware audio codec, but its good you were able to get to the solution as soon as you did without having to go through help iterations. Well done !