Log in as root. Type this:
#alsaconf to config your sound device
#alsamixer and unmute the devices you wand to use
Then start X to se whether everything works fine. If it works run KMix. If not, shutdown X, run alsamixer again ant try with different settings till it works.
Shutdown X and type:
#alsactl store to accept the chages
For the other problem try googling or search this section of the forum
http://www.linuxquestions.org/questi...splay.php?f=14. I'm sure you'll find answer to your problem.
Good Luck!