View Full Version : [ubuntu] No Sound For MacPro4,1 running Ubuntu 10.04 LTS

November 1st, 2010, 08:53 PM
I am running Ubuntu 10.04 on a MacPro4,1. I don't get any sound. Anybody have any ideas or things I can test? Thanks.

November 2nd, 2010, 09:14 AM
did you try to unmute the channels with

(unmute with the m key)

November 2nd, 2010, 06:54 PM

Yes, I unmuted everything with alsamixer and turned the volume as high as possible and I get nothing.

November 3rd, 2010, 10:56 AM
then there is a problem. I would Google and file a bug report against Alsa.

November 3rd, 2010, 05:56 PM
From the wiki (https://help.ubuntu.com/community/MacPro):

"For the HDA Realtek ALC885/intel sound, the default installation does not enable sound output. An easy solution is to edit:

sudo gedit /etc/modprobe.d/alsa-base.conf

and add at the end:

options snd-hda-intel model=imac24

This is the only option that works. Other model=macpro is not effective. Currently Only the back sound output port is working properly. The front audio port does not output at full volume. Better than nothing :-)) ."

For me (Macmini4,1), what worked was =mbp55

You can try these and see if it works. If it doesn't, you can just remove the lines.