Red Hat Bugzilla – Bug 590907
MacBook Pro 13" (5,5) front speaker muted by default
Last modified: 2011-04-27 18:48:58 EDT
Created attachment 412994 [details]
alsa-info for MacBook Pro 13" 5,5
Description of problem:
On MacBook Pro 13" (5,5) summer 2009 edition the front speaker is muted by default. Modifying this (unmute + setting volume to 0dB fixes it). This report is for the built in speakers.
Version-Release number of selected component (if applicable):
No sound without modifying mixer (alsamixer -c 0)
Sound by default
Created attachment 412995 [details]
Created attachment 412996 [details]
*** Bug 590906 has been marked as a duplicate of this bug. ***
If I can help a quick fix it to add the following lines to
amixer -c 0 set 'Surround Speaker' 115 unmute
amixer -c 0 set 'Front Speaker' 115 unmute
amixer -c 0 set 'Surround Speaker Playback Volum' 115 unmute
... This is what i did on my Macbook Pro 5.4 :)
This bug appears to have been reported against 'rawhide' during the Fedora 14 development cycle.
Changing version to '14'.
More information and reason for this action is here:
The workaround from Luca didn't work for me
*** This bug has been marked as a duplicate of bug 580703 ***
> amixer -c 0 set 'Surround Speaker' 115 unmute
...did the trick on my MacBookPro5,5.
> amixer -c 0 set 'Front Speaker' 115 unmute
The "Front Speaker" command unmutes some very strange speaker, it sounds kinda "metallic", with no bass, so I turned it off again. Together with the "Surround Speaker" it sounds a bit better, but overall sound experience is still awful compared to what I have under MacOSX. But at least it's "working" now!
> amixer -c 0 set 'Surround Speaker Playback Volum' 115 unmute
The "Surround Speaker Playback Volum" command did nothing here.
$ lspci | grep Audio
00:08.0 Audio device: nVidia Corporation MCP79 High Definition Audio (rev b1)