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
