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刚刚装好ubuntu710之后是有声的，因为和704一样没法录音（以前搞了好久，换成oss又换回alsa竟能录音了），我就从官网下载了最新的alsa-driver1.0.16/alsa-tools1.0.16/alsa-utils1.0.16/alsa-lib1.0.16,先用apt卸载掉自带的alsa-base之后，再编译安装，竟然没声了，好奇怪，坛子里的贴查了好多，都不行（我记得./snddevice了），而且alsaconf后有两个：hda-Intel intel corporation 82801H(ICH8 Fa...)和legacy Probe legacy ISA (non-PnP) chips ,当然选了第一个，Building card database..

Running update-modules...
Setting default volumes...
amixer: Mixer attach default error: No such file or directory
Saving the mixer setup used for this in /etc/asound.state.
/usr/sbin/alsactl: save_state:1497: No soundcards found...

===================
Now ALSA is ready to use.
For adjustment of volumes, use your favorite mixer.
Have a lot of fun!
用alsamixer会提示alsamixer: function snd_ctl_open failed for default: No such file or directory
真是怪了，为什么会 No soundcards found...啊，各位老大，帮帮偶哈,抓狂ing


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后来我也试过oss，顺便也说一下我用oss遭遇的窘境吧：
用oss后音箱喇叭没声，但耳麦有声，我猜测可能是因为这款电脑有两个耳麦插口，所以通常对应喇叭的/dev/oss/hdaudio0/pcm0现在变成了第一个耳机接口，而通过ossxmix设置(即把第一个fp-black从front调为centre/LFE)可以把/dev/oss/hdaudio0/pcm1变为指向耳机第一接口但喇叭仍然没声

另，/dev/oss/hdaudio0/pcm3被认成side，指向第二耳机接口一直好用
附上osstest的结果
/dev/oss/hdaudio0/pcm0 (audio engine 0): High Definition Audio front
- Performing audio playback test...
<left> OK <right> OK <stereo> OK <measured srate 47976.00 Hz (-0.05%)>
##默认这里插耳机第一口有声
/dev/oss/hdaudio0/pcm1 (audio engine 1): High Definition Audio center/LFE
- Performing audio playback test...
<left> OK <right> OK <stereo> OK <measured srate 47969.00 Hz (-0.06%)>
##通过ossxmix设置后这里耳机一口有声
/dev/oss/hdaudio0/pcm2 (audio engine 2): High Definition Audio rear
- Performing audio playback test...
<left> OK <right> OK <stereo> OK <measured srate 47972.00 Hz (-0.06%)>
##这里一直无声
/dev/oss/hdaudio0/pcm3 (audio engine 3): High Definition Audio side
- Performing audio playback test...
##这里是耳机第二口有声

喇叭一直无声

BTW，我的机器是dell1420,用lspci -v|grep Audio看声卡是“Intel Corporation 82801H (ICH8 Family) HD Audio Controller (rev 02)”

拜托了救我啊，谢谢啦，不管alsa或oss哪个搞好也行啊。。。

对了，是不是我一开始卸alsa时误删过什么东西啊。。

dell的好解决，网上找下，dell有ubuntu iso oem for dell专版下载的。

ubuntu英文论坛有dell专区，内容也很丰富。

另外，自己编译安装，要确保方法正确。

哦，谢谢，可我不想再重装系统了哈，太麻烦了，而且应该不是bug,因为本来是有声的，唉，不该重装alsa驱动，后悔ing

哈哈，总算好了，搞得好辛苦啊。。
先按http://www.alsa-project.org/main/index.php/Mat ... l这里的仔细做了一遍，不行，又参考了http://forum.ubuntu.org.cn/viewtopic.php?t=90653的帖子，还有帖子的这一页：viewtopic.php?p=568872&sid=09d22a6e6b23 ... 2e56feff2c

还是不行，alsamixer总提示alsamixer: function snd_ctl_open failed for default: No such device

最后还是看了https://help.ubuntu.com/community/HdaIntelSoundHowto才好的，主要是页面最后这几句：

Troubleshootinng
dmesg shows "disagrees about version of symbol" and "Unknown symbol" for snd_ctl_add, etc

if you reboot and have no sound, and check dmesg to find:

[ 1058.932000] snd_hda_intel: disagrees about version of symbol snd_ctl_add
[ 1058.932000] snd_hda_intel: Unknown symbol snd_ctl_add
[ 1058.932000] snd_hda_intel: disagrees about version of symbol snd_pcm_new
[ 1058.932000] snd_hda_intel: Unknown symbol snd_pcm_new
[ 1058.932000] snd_hda_intel: disagrees about version of symbol snd_pcm_limit_hw_rates
[ 1058.932000] snd_hda_intel: Unknown symbol snd_pcm_limit_hw_rates
[ 1058.932000] snd_hda_intel: disagrees about version of symbol snd_card_register
[ 1058.932000] snd_hda_intel: Unknown symbol snd_card_register

... etc. then you need to do a few extra steps.

ubuntu default snd-hda-intel.ko location: /lib/modules/2.6.22-14-generic/ubuntu/media/snd-hda-intel/snd-hda-intel.ko

alsa 1.0.15's installation location: /lib/modules/2.6.22-14-generic/kernel/sound/pci/hda/snd-hda-intel.ko

so copy /lib/modules/2.6.22-14-generic/kernel/sound/pci/hda/snd-hda-intel.ko to /lib/modules/2.6.22-14-generic/ubuntu/media/snd-hda-intel/snd-hda-intel.ko .

and put the modules/* in alsa's compile directory into /lib/modules/.../kernel/sound, you can use "find" to get their location. snd-hda-intel.ko snd-hwdep.ko snd.ko snd-mixer-oss.ko snd-page-alloc.ko snd-pcm.ko snd-pcm-oss.ko snd-rtctimer.ko snd-seq-device.ko snd-seq.ko snd-seq-midi-event.ko snd-seq-oss.ko snd-timer.ko

then, depmod -a

reboot, try again.

即ubuntu的默认snd-hda-intel.ko的地址是在/lib/modules/2.6.22-14-generic/ubuntu/media/snd-hda-intel/snd-hda-intel.ko，而alsa1.0.15的安装地址是在/lib/modules/2.6.22-14-generic/kernel/sound/pci/hda/snd-hda-intel.ko，所以要将 /lib/modules/2.6.22-14-generic/kernel/sound/pci/hda/snd-hda-intel.ko拷贝到/lib/modules/2.6.22-14-generic/ubuntu/media/snd-hda-intel/snd-hda-intel.ko .
另外，还要把alsa的编译目录下的modules文件夹中的东东拷到 /lib/modules/.../kernel/sound下，你可以用find命令找如下文件的地址：snd-hda-intel.ko snd-hwdep.ko snd.ko snd-mixer-oss.ko snd-page-alloc.ko snd-pcm.ko snd-pcm-oss.ko snd-rtctimer.ko snd-seq-device.ko snd-seq.ko snd-seq-midi-event.ko snd-seq-oss.ko snd-timer.ko

这里说的是alsa1.0.15,其实对我的1.0.16也管用，我也没find，直接sudo cp -r /usr/src/alsa/alsa-driver1.0.16/modules /lib/modules/2.6.22-14-generic/kernel/sound了，然后就好了，嘎嘎嘎