Sound on Thinkpad x60s

You can start by looking at this page:

https://help.ubuntu.com/community/DebuggingSoundProblems

I tried the suggestions on https://help.ubuntu.com/community/DebuggingSoundProblems. My volume is turned up, and this is what the aadebug script returns:

ALSA Audio Debug v0.1.0 - Sat Jun 30 20:26:54 PDT 2007
http://alsa.opensrc.org/aadebug
http://www.gnu.org/licenses/gpl.txt

Kernel ----------------------------------------------------
Linux Dwundallyn 2.6.15-26-386 #1 PREEMPT Thu Aug 3 02:52:00 UTC 2006 i686 GNU/Linux

Loaded Modules --------------------------------------------
snd_hda_intel 18964 1
snd_hda_codec 154672 1 snd_hda_intel
snd_pcm_oss 53664 0
snd_mixer_oss 18688 1 snd_pcm_oss
snd_pcm 89864 3 snd_hda_intel,snd_hda_codec,snd_pcm_oss
snd_timer 25220 1 snd_pcm
snd 55268 8 snd_hda_intel,snd_hda_codec,snd_pcm_oss,snd_mixer_oss,snd_pcm,snd_timer
snd_page_alloc 10632 2 snd_hda_intel,snd_pcm

Modprobe Conf ---------------------------------------------
Warning: module config file does not exist
This means any kernel modules will not be auto loaded
See your linux distro docs on how to create this file

Proc Asound -----------------------------------------------
Advanced Linux Sound Architecture Driver Version 1.0.10rc3 (Mon Nov 07 13:30:21 2005 UTC).
0 [Intel ]: HDA-Intel - HDA Intel
                     HDA Intel at 0xee240000 irq 66
 16: [0- 0]: digital audio playback
 24: [0- 0]: digital audio capture
  0: [0- 0]: ctl
 33: : timer
cat: /proc/asound/hwdep: No such file or directory
00-00: AD198x Analog : AD198x Analog : playback 1 : capture 1
cat: /proc/asound/seq/clients: No such file or directory

Dev Snd ---------------------------------------------------
controlC0 pcmC0D0c pcmC0D0p timer

CPU -------------------------------------------------------
model name : Intel(R) Core(TM) Duo CPU L2400 @ 1.66GHz
cpu MHz : 997.325

RAM -------------------------------------------------------
MemTotal: 1547012 kB
SwapTotal: 3196892 kB

Hardware --------------------------------------------------
0000:00:00.0 Host bridge: Intel Corporation Mobile Memory Controller Hub (rev 03)

I don't think this is a typical Ubuntu bug, but perhaps something more specific to x60s. I'm not sure how to create a module config file or whether this is what is needed to solve the problem.

For intel HDA have a look here:

https://help.ubuntu.com/community/HdaIntelSoundHowto

Note that the latest alsa will be included in 7.10. The version you are using in 6.06 is most probably quite outdated.
You can check your alsa version with this command:

cat /proc/asound/version

On my machine:

Advanced Linux Sound Architecture Driver Version 1.0.14.
Compiled on Jun 12 2007 for kernel 2.6.20-16-lowlatency (SMP).