Slackware64 13.0 on the MacBook: sound

With the stock kernel, 2.6.29.6, I had to install the latest alsa drivers from: http://www.alsa-project.org/ and still, I had sound only from the right channel.  This may have been my fault I added the following line to /etc/modprobe.d/sound:

options snd_hda_intel model=mbp3

Anyway, I decided to upgrade the kernel to 2.6.34 and found that its drivers supported the MacBook’s sound device: HDA NVidia, ALC889A.  Once I removed the line above from /etc/modprobe.d/sound, audio works really well!

I have tried it with the built-in speakers and with headphones.  Changing the Channel Mode from 2 to 6 doesn’t seem to have any effect on the analog outputs.

For good form, I created the file ~/.asoundrc containing:

pcm.card0 {
  type hw
  card 0
}
ctl.card0 {
  type hw
  card 0
}

My guess is that Channel Mode works on the digital output.

Anyway, the MacBook and I are happy with Slackware64!

Peace!
Stu…

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