No sound -- 2.6.21/2 and ALSA (ATI SB450 HD audio/ Realtek ALC861 on Toshiba)
 

Hya,

This post for the following penguins:
Debian lenny
Kernel 2.6.21.x or 2.6.22.x,
sound chip is ATI SB450 HD audio with Realtek ALC851 chipset,
Toshiba laptop,
and
alsamixer shows zero master volume, (and NOT adjustable, thus no sound).

Solution is
run alsaconf (etch version, not lenny version)
and
pass parameter toBackground is:
ALSA works with 2.6.20 kernel, without any tweak.
ALSA does not work with 2.6.21/2.
Read following page with changes with 2.6.21.x (ALC861 with Toshiba)
http://kernelnewbies.org/Linux_2_6_2...0d1829548aeb1c
Read ALSA-Configuration.txt in kernel source

However, neither of following worksIt was confusing.

Happy Penguins!

just a guess,
but did you also try not to use the kernel-based drivers
but the software alsa-driver? some time ago it worked
for me this way with a similar problem.

greez,

toby

Hya,

I did only kernel based driver.

I have not tried any other. It is working, so at present, I need to do something else.

Happy Penguins!

Hya,

This trick does not work with etch. I have not figured out how to yet.

Happy Penguins!


Edit
The way to find if it works is that alsamixer has master volume bar and it is adjustable.

Hya,

I do not know what I did. However, I traced what I did and tried to find out the problem. It is working as #1 on etch also.

Happy Penguins!

to /etc/modprobe.d/aliases add this line

alias snd-card-0 snd-hda-intel

to /etc/modprobe.d/alsa-base add this line

options snd-hda-intel enable=1 index=0