Slackware 9 no sound
I recently installed slackware 9 and can't get any sound to work. When I start Gnome I get the message:
Couldn't open mixer device /dev/sound/mixer
In KDE the message is:
Error while initializing the sound driver.
device /dev/dsp can't be opened (no such device)
The sound server will continue, using the null output device.
My computer is an IBM intellistation which I purchased from pc surplus online, I have no manuals or operating system other than Slackware. I understand that I have onboard sound, but that's all I know (I'm not even sure exactly what onboard sound is). How can I use Slackware to learn more about the computer? Can this information help me fix the sound problem? I started using linux a week ago.