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

[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)

`dmesg`:
> Pasted here: http://p.vim-cn.com/cbbcw

`cat .pulse/daemon.pa`:
> default-sample-rate = 48000
> alternate-sample-rate = 44100
> default-sample-format = float32le

`cat /etc/modprobe.d/alsa-base.conf`:
> options snd-hda-intel model=acer
(This file aims to fix another bug. Trying to remove this file could not fix this problem. I paste this file only because it is related to sound.)

`lsmod`:
> Pasted here: http://p.vim-cn.com/cbbcx