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[Gagi <dragoljub@xxxxxxxxx>]

Just thought I would respond with my status.

Currently I have both speakers working on my MacBook Pro 17"  5.2!

The problem for me was that LINE OUT volume had to be maximized!

I ended up running alsamixer, tabbing through until I was viewing all
options and  maximized line out.

After checking with 5.1 surround sound tests My speakers are displaying
correctly, however the alsa speaker test has them only producing output
on rear left and rear right.

The sound is also quite low, requiring almost full volume and allowing
very little useful adjustment range.

But bottom line 5.2  MBP 17" speakers work, although not perfectly!

-- 
Left speaker doesn't work, controls mixed up on Apple MacBook[Pro] (5,1)
https://bugs.launchpad.net/bugs/337314
You received this bug notification because you are a member of Mactel
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