声卡是HDA Intel，芯片为IDT 92HD81B1C5的ubuntu12.04下声音很小的解决方法

我的电脑是联想邵阳E46L。装完ubuntu12.04以后声音很小的解决方法如下：

(1)查询基本信息

$ uname -a

Linux lqc-Rev-1-0 3.2.0-29-generic #46-Ubuntu SMP Fri Jul 27 17:03:23 UTC 2012 x86_64 x86_64 x86_64 GNU/Linux

$ aplay -l

**** List of PLAYBACK Hardware Devices ****

card 0: Intel [HDA Intel], device 0: STAC92xx Analog [STAC92xx Analog]

Subdevices: 0/1

Subdevice #0: subdevice #0

$ cat /proc/asound/version

Advanced Linux Sound Architecture Driver Version 1.0.24.

(2) 从alsa官方网站http://www.alsa-project.org/main/index.php/Main_Page下载最新alsa-driver-1.0.25驱动:alsa-driver-1.0.25.tar.bz2

解压：tar -jxvf alsa-driver-1.0.25.tar.bz2

$ ./configure

$ make

$sudo make install

(3) 重启电脑，声音就变大了，问题解决了。安装成功后如下：

$ cat /proc/asound/version

Advanced Linux Sound Architecture Driver Version 1.0.25.

Compiled on Jan 8 2013 for kernel 3.2.0-29-generic (SMP).