Arch Linux

jeff777

Member

Registered: 2007-11-12

Posts: 16

no sound: alsa snd-hda-intel macbook pro

I can't get sound to work on my macbook pro and I'd appreciate some advice.  lspci shows the following soundcard:

00:1b.0 Audio device: Intel Corporation 82801G (ICH7 Family) High Definition Audio Controller (rev 02)

According to the alsa sound card matrix, this card uses the snd-hda-intel module.  I've followed the alsa article at http://wiki.archlinux.org/index.php/ALSA.  Here's what I'm seeing:

# lsmod|grep '^snd'
snd_seq_oss            29312  0 
snd_seq_midi_event      6528  1 snd_seq_oss
snd_seq                46800  4 snd_seq_oss,snd_seq_midi_event
snd_seq_device          6924  2 snd_seq_oss,snd_seq
snd_pcm_oss            36896  0 
snd_mixer_oss          14464  1 snd_pcm_oss
snd_hda_intel         286624  0 
snd_pcm                68996  2 snd_pcm_oss,snd_hda_intel
snd_timer              19332  2 snd_seq,snd_pcm
snd_page_alloc          8072  2 snd_hda_intel,snd_pcm
snd_hwdep               7300  1 snd_hda_intel
snd                    44644  9 snd_seq_oss,snd_seq,snd_seq_device,snd_pcm_oss,snd_mixer_oss,snd_hda_intel,snd_pcm,snd_timer,snd_hwdep

# ls -l /dev/snd
total 0
crw-rw---- 1 root audio 116,  1 Nov 11 19:47 seq
crw-rw---- 1 root audio 116, 33 Nov 11 19:47 timer

# cat /etc/modprobe.conf
#
# /etc/modprobe.conf (for v2.6 kernels)
#

# --- BEGIN: Generated by ALSACONF, do not edit. ---
# --- ALSACONF version 1.0.15 ---
alias snd-card-0 snd-hda-intel
alias sound-slot-0 snd-hda-intel
# --- END: Generated by ALSACONF, do not edit. ---

# amixer
amixer: Mixer attach default error: No such device

# /etc/rc.d/alsa start
:: Restoring ALSA Levels                                                                               [BUSY] /usr/sbin/alsactl: load_state:1327: No soundcards found...
                                                                                                       [FAIL]

According to the wiki article, there should be controlC0 and pcmC0D0p devices under /dev/snd.  I think the module isn't being installed correctly.

My system is a 2nd generation macbook pro.  I've read that support for my card was recently added to alsa.  I've had sound working under gentoo and debian by compiling snd-hda-intel statically into kernel 2.6.21.  Can anyone give me advice on how to get this working? 

BTW, I'm new to Arch, and I'm really impressed with it so far.  Apart from sound, everything has worked well.

buddabrod

Member

From: Germany

Registered: 2007-02-25

Posts: 220

Re: no sound: alsa snd-hda-intel macbook pro

Gentoo inculded alsa-git into latest gentoo-sources because it added support for this soundchip (i got the same). Maybe try kamikaze-sources from AUR, they will make your soundchip work.

jeff777

Member

Registered: 2007-11-12

Posts: 16

Re: no sound: alsa snd-hda-intel macbook pro

I'll give kamikaze-sources a try.  Thanks.  What exactly is kamikaze-sources?  Neither the AUR page or the homepage (http://kamikaze.waninkoko.es) really explains it.

Has anyone gotten this this sound card to work in Arch and what exactly did you have to do?  Unless kamikaze-sources is really easy to install, I'll probably just compile a custom kernel.

jcci

Member

From: China / Germany

Registered: 2007-06-10

Posts: 185

Re: no sound: alsa snd-hda-intel macbook pro

http://bbs.archlinux.org/viewtopic.php?id=39765

it worked for me

jeff777

Member

Registered: 2007-11-12

Posts: 16

Re: no sound: alsa snd-hda-intel macbook pro

The Kamikaze sources worked for me.  The macbook pro 2nd gen soundchip is not supported by current stock Arch kernel.

I tried setting options snd-hda-intel model=mbp3, but I have a macbook pro 2nd gen.  I tried mbp2, mbp, and macbook.  With the macbook option, the files appear under /dev/snd, but sound still doesn't work.