笔记一：解决ubuntu10.04插上耳机仍有外音问题

To do this, we must begin by determining our version of alsa as follows :

cat /proc/asound/version
Advanced Linux Sound Architecture Driver Version 1.0.21.

To avoid problems during the upgrade of Alsa-utils, we need to stop it with the following command :

sudo /sbin/alsa-utils stop

sudo apt-get -y install build-essential ncurses-dev gettext xmlto libasound2-dev
sudo apt-get -y install linux-headers-`uname -r` libncursesw5-dev

Then, we go in our personal folder and download alsa-driver, alsa-lib and alsa-utils :

cd ~
rm -rf ~/alsa* ~/.pulse*
wget ftp://ftp.alsa-project.org/pub/driver/alsa-driver-1.0.23.tar.bz2
wget ftp://ftp.alsa-project.org/pub/lib/alsa-lib-1.0.23.tar.bz2
wget ftp://ftp.alsa-project.org/pub/utils/alsa-utils-1.0.23.tar.bz2

After that, we create a new folder for the compilation and installation of the 3 files. Then, we move the 3 tar files that we just downloaded in this folder :

sudo rm -rf /usr/src/alsa
sudo mkdir -p /usr/src/alsa
cd /usr/src/alsa
sudo cp ~/alsa* .

Unpack the 3 tar files :

sudo tar xjf alsa-driver*
sudo tar xjf alsa-lib*
sudo tar xjf alsa-utils*

We compile and install alsa-driver :

cd alsa-driver*
sudo ./configure
sudo make
sudo make install

We compile and install alsa-lib :

cd ../alsa-lib*
sudo ./configure
sudo make
sudo make install

We compile and install alsa-utils :

cd ../alsa-utils*
sudo ./configure
sudo make
sudo make install

Then, we remove the 3 tar files in our personal folder that are not anymore necessary :

rm -f ~/alsa-driver*
rm -f ~/alsa-lib*
rm -f ~/alsa-utils*

Then, just restart your computer and your alsa version should be 1.0.23!

You can verify that you have now indeed have this version of alsa :

cat /proc/asound/version
Advanced Linux Sound Architecture Driver Version 1.0.23.
Compiled on May 2 2010 for kernel 2.6.32-21-generic (SMP).

Just to be sure everything is well configured, execute this command :

sudo alsaconf

and reboot again!

第二步：配置alsa-base.conf文件

  输入以下指令

 sudo gedit /etc/modprobe.d/alsa-base.conf

打开alsa-base.conf后在最后一行添上options snd-hda-intel model=xxxxx 注意等号两边没有空格。

如果没法更改则可能权限不够，输入指令：

cd /etc/modprobe.d/

chmod 777 alsa-base.conf

下面最重要的就是xxxxx的配置。快捷键ctrl+f进入搜索功能，输入ALSA-Configuration.txt查找后打开，然后根据自己的声卡配置，不知道的同学可以在终端下输入alsamixer，card和chip后的名称则分别是声卡和芯片。我的电脑是华硕，改成asus不能用，最后改成lenovo-3000就行了。

如果懒得查找的同学可以把options snd-hda-intel model=xxxxx更改为以下试试；

options snd-hda-intel model=lenovo-3000

options snd_hda_intel model=lenovo-nb0763 

options "snd_hda_intel" model=lenovo-101e

options snd-hda-intel model=acer

options snd-hda-intel model=ideapad

options snd-hda-intel model=auto

options snd-hda-intel model=asus

          好了，大概就这么多，希望能够给同学们一点点帮助，早日配置好自己的声卡驱动，享受耳机里的优美音质。哈哈~~~