Why is my sound not working in ubuntu?

well my sound works just fine in xp but in ubuntu its just mute it getting really frustrating!!! the sound card is being recognized i know that. someone help me please!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!…

One day the sound was working and the next day it stopped. Every time I click on the sound device this is what it says: No volume control GStreamer plugins and/or devices found I have no idea how to fix, people tell me how but its to complex to figure...

Just recently downloaded a TON of Ubuntu updates, and the sound stopped working when I rebooted. Any ideas as to how I can fix this, or at least diagnose the problem? I have a Dell Latitude with a 2.4ghz processor, 2 gigs of ram and 64 megs of video...

I got a new laptop from my brother, who installed Linux on it because hei hates windows. I am totally fine with Linux, I have it on y my other computer, but the sound has stopped ...show more

My laptop is Compaq Presario V3614AU from recent days, It's sound is not working I have both Windows 7 and Ubuntu Lucid in dual boot in both sound is not working, mean no sound device recognized. Sometimes I forcibly switch off and turn on sound working...

I have the most recent version of Ubuntu installed and running perfectly fine on my computer. Its been quite some time since I used Ubuntu so I need to get familiar with the set up again. Because of that I had a some problems getting my sound to work...

i just got ubuntu and its all working great, then suddenly 2 days ago i realised that i had no sound. I have ubuntu 9.04 and need to fix this problem fast!!!

It was working fine about an hour ago, then it suddenly stopped working. I have a Sony Vaio PCG-71213L with a partitioned hard-drive running Ubuntu 11.10 and Windows 7, and the sound doesn't work on either OS. (I can tell that it's not a driver install...