[arch-general] Broken sound with Linux 3.9.2 on Acer laptop

[LANGLOIS Olivier PIS -EXT]

Hello BlissSam,

> After upgrading to 3.9.2 kernel, the sound did not work.
> However, the system CAN recognize my sound card, and my sound card
> appeared in `alsamixer` Downgrading the kernel can solve the problem.
>
>
> Providing more info:
>
> Acer Aspire laptop, with Intel i5 CPU, 2nd generation SandyBridge.
>
> `uname -a`:
> > Linux brilliant-laptop 3.9.2-1-ARCH #1 SMP PREEMPT Sat May 11 20:31:08
> > CEST 2013 x86_64 GNU/Linux
>
> `lspci | grep Audio`:
> > 00:1b.0 Audio device: Intel Corporation 6 Series/C200 Series Chipset
> > Family High Definition Audio Controller (rev 04)
>
lspci -nn | grep Audio could provide some info susceptible to help.

snd_hda_intel apply treat differently hda intel hardware differently depending on device id.

Explore a little bit files content under /proc/asound

Such as:

/proc/asound/cards
/proc/asound/devices
/proc/asound/pcm
/proc/asound/card0/codec*

Fallback to simple stuff such as

speaker-test -c2

aplay somewavfile.wav
aplay -l
aplay -L

I have found it useful and very interesting to do

strace -e trace=open speaker-test -c2

That shows you all config files that alsa-lib opens.


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