can't hear sound in ubuntu only?

[navaneethan]

I can't able too hear sound in my headphone...but i can able to hear in windows xp...sometimes it works too ubuntu but many times i can't able to hear(not works)..i don't how it happens?what is the reason?
i am using ubuntu 8.04 hardy

[blazemore]

Hello. I would recommend reading the Comprehensive Sound Problems Solution Guide. (http://ubuntuforums.org/showthread.php?t=205449)
I hope this helps.