Sound stopped working with ALSA and AWN on Macbook Pro 5,1 in Jaunty 9.04

The usual troubleshooting guides might be helpful?

https://help.ubuntu.com/community/SoundTroubleshooting

https://wiki.ubuntu.com/DebuggingSoundProblems

Also there's been some chatter on DistroWatch about sound issues in linux generally and these pages might be interesting (i haven't read them yet)

http://insanecoding.blogspot.com/2009/06/state-of-sound-in-linux-not-so-sorry.html

http://www.opensound.com/

Good luck with this
Regards from
Tom :)

hi tom,
thanks for your response.
on my macbookpro 5,1, under Jaunty 9.04, i dutifully followed the steps mentioned here:
https://help.ubuntu.com/community/SoundTroubleshooting#Basic%20Troubleshooting%20Steps

[note: am also using AWN, but switching it off or on and rebooting makes no difference].

01. when i type aplay -l the output reveals:
card 0: NVidia [HDA NVidia], device 0: ALC883 Analog [ALC883 Analog]
  Subdevices: 1/1
  Subdevice #0: subdevice #0
card 0: NVidia [HDA NVidia], device 1: ALC883 Digital [ALC883 Digital]
  Subdevices: 1/1
  Subdevice #0: subdevice #0

please note, the device is ALC883, above.

the alsa-mixer GUI shows it as Card: HDA NVIDIA, and chip as: RealteK ALC889A.
note the 889A versus the 883. ???

for the 'is my soundcard supported' section, i could not decipher which one would show the soundcard for this macbookpro. could not find it under apple, nvidia, intel, or other sub-sections. however, my soundcard is supported as until a few days, everything worked correctly. so i skip this section.

for the section, 'is alsa using the correct model', my alsa report is filed here:
http://www.alsa-project.org/db/?f=150758837bfd3d7e562179d92345960ad936d0e7

as instructed, i then opened alsa-configuration.txt from here:
http://git.alsa-project.org/?p=alsa-kmirror.git;a=blob;f=Documentation/ALSA-Configuration.txt;h=30499cf77d5628968a9347b3a6440a0064713eaf;hb=4c767126ddc90264b8d6584548f4aa859216f481

where i did find snd-hda-intel, but could not find a sub-section on ALC889A. however i did find the subsection on ALC883/888

i could not decipher the stacks line, that is appropriate for a macbookpro 5.1. sigh!
anyways, i did try to sniff around in /modprobe.d/alsa-base.conf
but could not find any relevant section or a mention of the specific chipset label. so left it untouched.

now what do i do, please?
was hoping to get the sound up, so could move on to configuring sound to stream to airport express using gtransmit or alternatives.

thanks in advance.

regards
niyam

solved the problem.
apparantly, a few days ago the kernel and a few other components got upgraded, rendering my alsa unusable.
noticed i had an alsa-*10.0.19 installed in my downloads folder, while configurations showed my macbookpro was using 10.0.18r3. so just did the install, make, sudo make install routine again, rebooted, set channels to 6 in the alsa-mixer, and everything works as usual. whew!
thanks everyone.

regards
niyam

Omg, unbelievable - nicely fixed!!!
Congrats and regards from
Tom :)