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[Bug 337314] Re: Left speaker doesn't work, controls mixed up on Apple MacBook[Pro] (5, 1)

 

>Also I've had my sound muted for the past 2 weeks or so and now when I
unmute it I still have zero sound. I was going >to re-follow the wiki to
patch alsa 1.0.19 and see if just re doing it got sound working again
but does anyone see any >benefit in just trying the already patched
1.0.20?

I thought I was the only one.  I'm completely broken too.  The
headphones don't even work.  I didn't change anything, I just installed
updates.  I'm thinking something came down the pipe that knocked us out.

-- 
Left speaker doesn't work, controls mixed up on Apple MacBook[Pro] (5,1)
https://bugs.launchpad.net/bugs/337314
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Support, which is the registrant for Mactel Support.

Status in ALSA driver: Unknown
Status in Mactel Support: Confirmed
Status in “alsa-driver” package in Ubuntu: New

Bug description:
Reporting this bug for another user...

In MacBook and MacBookPro 5,1 (aluminium, late 2008) the soundcard works out of the box only with headphones, and to turn speakers on it is necessary to manually set the 6 channels. In that case, sound is heard both on headphones and right and center speaker; the left speaker doesn't work yet.

This bug is confirmed by several users, see the additional information attached.

della@raker:~$ lspci | grep -i audio
00:08.0 Audio device: nVidia Corporation MCP79 High Definition Audio (rev b1)
della@raker:~$ grep Codec /proc/asound/card0/codec#*
Codec: Realtek ALC889A



References