Sound not working on Dimension C521

[NotWindowsXPagain50]

Hi
I'm using Ubuntu 9.04 dual-boot (Partitions C (Windows XP), D(Data of Windows XP and Z(Ubuntu 9.04))
I've got a problem in my PC Dimension C521, When testing sound hardware there is no beep. Either in flash or MP3 I can't hear sound (I'm not deaf!:D)

Audio is SigmaTel 9207 (Heard it causes that problem)

List of things I tried:


Mute and Unmute
Restore Kernel
Update Driver
Check if anyone had the same problem (They did, but not solved:lolflag:)
Restart
Tried to use OSS and not default ALSA



Started in only needed hardware
Runned alsamixer

Could any one help me?
P.S: Service Tag is FVH2Q2J and should display Dimension C521

My Email is rchomicz122@gmail.com

[NotWindowsXPagain50]

Forgot to say I'm a beginner in Ubuntu

[feedmecereal]

Lots of us have been having similar problems with Dell E520's. You can read this thread for a solution that mostly worked for me: http://ubuntuforums.org/showthread.php?t=977604&highlight=e520+sound. Check out helpdeskdan's last post.

I hope that helps.