mactel-support team mailing list archive

[Chris Lasher <chris.lasher@xxxxxxxxx>]

I get a noticeable amount of oscillating noise from the headphones now,
using the patch against ALSA 1.0.19, and following the instructions on
the wiki for using PulseAudio with 6 channel sound. The oscillating
noise goes away when I mute the HP channel. However, when I mute it, I
can hear a steady tone. If I slide the volume sliders up and down for
the HP channel, the pitch will change (randomly, not directly or
inversely).

Additionally, the internal mic does not seem to work for me. Whenever I
open Volume Control and go to the recording tab, the channel is always
shown with a muted mic button. I unmute it and try to record with GNOME
Sound Recorder, but it doesn't record anything.

-- 
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” source 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