From the ALSA wiki
If you have an IBM Thinkpad 360, 750, 755, or 755C with a Crystal CS4248 audio chip, the module options are:
snd-ad1848 port=0x4e30 irq=10 dma1=0 thinkpad=1
The "thinkpad" option was recently added to the driver and is required to initialize the audio chip on these laptops.
If you are not sure if you have this chip, you can open the thinkpad and in the upper left corner (near the headphone outputs & speaker) there will be a little board with the following components:
- Crystal CS4248-KQ EP
- Dallas DS1669S-50
- Motorola MC33274AD
IBM part numbers on the sound board:
- fru p/n 84g4289
Setting up modprobe and kmod support
NB. Before you send a mail complaining that "I don't have /etc/modules.conf, where do I find it ....." ,The /etc/conf.modules has been deprecated with a few distro's so in your case, it may still be /etc/conf.modules. Basically they are both same, but recent version of modutils uses /etc/modules.conf instead. Nothing to worry about as such, optionally please update to latest version of modutils. This should solve your problem.
Here's the example for this card. Copy and paste this to the bottom of your /etc/modules.conf file.
# ALSA portion alias char-major-116 snd alias snd-card-0 snd-ad1848 options snd-ad1848 # OSS/Free portion alias char-major-14 soundcore alias sound-slot-0 snd-card-0 # card #1 alias sound-service-0-0 snd-mixer-oss alias sound-service-0-1 snd-seq-oss alias sound-service-0-3 snd-pcm-oss alias sound-service-0-12 snd-pcm-oss
To copy and paste the above to your /etc/modules.conf file follow these instructions.