It's time to write down how I configure my Alsa sound card on my Dell 640m. Next time I won't bother much time in Googling and trying this way and that...

1. Update Kernel by using:

   [root@localhost ~]# yum install kernel ;

   Or: Download the latest kernel from Software Updater, like kernel-smp-2.6.17-1.2187_FC5.i686.rpm ;

2. No need to re-compile the new kernel. Just install the rpm package by using Software Updater.
3. Download the latest Alsa Util and Lib package from Software Updater, then install them.
4. We can get the system infomation by using uname -a.

   [root@localhost ~]# uname -a Linux localhost.localdomain 2.6.17-1.2187_FC5smp #1 SMP Mon Sep 11 01:32:34 EDT 2006 i686 i686 i386 GNU/Linux

   Restart and switch to the latest version of the Fedora Core. That is Linux 2.6.17-1.2187_FC5smp. Note that smp means Duo Core system.

5. The sound panel should be un-muted and we use HDA-Intel (Alsa Mixer). We can test the sound by using:

   [root@localhost ~]# system-config-soundcard

6. Done!