I have a problem in Linux (Ubuntu). I am not able use my speaker. But my speaker is working properly in Windows. Please tell me what might be the reason.
well more info can be of help as suggested by James
if Speakers not working have you tried headphone?SoundTroubleshooting
ALSA Mixer and Input Source on Ubuntu 11.04
Your linux sound card drivers aren't working. I can't tell you how to fix that, since linux covers a vast array of distros and you haven't told us which you are using. It's also likely that your sound card won't ever work in linux.