How make sound?

[alikas]

Every time then KUBUNTU starts, show that message:
"Sound server informational message:
Error while initializing the sound driver:
device /dev/dsp can't be opened (No such file or directory)
The sound server will continue, using the null output device."
I have addaded to "/etc/modules" this text: 'modprobe snd-cs4236;modprobe snd-pcm-oss;modprobe snd-mixer-oss;modprobe snd-seq-oss', but sound do not work.

[alikas]

I make sound!

Just need add to buttom of '/etc/modules' sound card driver name, in my case 'snd-cs4236'.
That is simple is true.