Open control panel>single click on sigma tel,then click to uninstall.

Now open device manager>click on the (+) next to sound,video and game controllers>double click sigma tel high def audio codec>click the driver tab at top>click the uninstall tab at bottom.

Now re-boot laptop,when it starts back up windows will install a windows driver,let it.

When it finshes go to dells driver download page and install the driver you were attempting to install.

After it finishes installing,re-boot laptop.It should be working when it boots up.

It doesnt work for me in the order you suggested.

 

At the moment when the sigmatel software is uninstalled over the control panel the sigmatel hd audio entry at the device manager dissapears... So i can´t do step two.

 

O.k did you try and re-install the driver at that point?....

At this point i am not sure,other users i have suggested do this,it has worked for them.I do not know why after the first step the audio codec from device manager is deleted?...They have to be uninstalled from both places,control panel,then the driver from device manager.

 

Hopefully someone else will chime in with some help.

yeah, i tried about a hundred times with both driver versions, no effect.

 

Could it be that the hardware got damaged by installing the new driver?

 

This evening i will test the speakers of the xps with Dell Diagnostics. But i think there is no soundchip used. Its just the BIOS beep sound.

ok.

 

Found another sound entry at the control panel: Its called Advanced Audio FX Engine.

 

Should i uninstall it too?

Sorry it took so long to get back to you.i do not know what that is?...You can try,but i don't know if that is a download you can get from the driver page.

I just did a google search and found the advanced audio fx engine is for your webcam app.

 

So i don't think that will help with the sigma tel problem.

Not sure if this will work,but lets try this backwards.

 

open device manager and click the (+) next to sound,video and game controllers.

Double click sigma tel high def audio codec>click driver tab>click uninstall tab.(make sure you uninstall both)the one that caused the problem,and the old one.

Now open control panel and single click Sigma tel>click uninstall.

Now re-boot system,and let windows install its driver.Then go to dells driver page and install the driver you had that was working,then re-boot system again.

 

 

Da*n, i am working for two days on this problem and nothing is going forward :(

 

Just found a thread at notebookreview forums, where two users have exact the same issues and there is no solution in sight:

 

http://forum.notebookreview.com/showthread.php?t=242453

 

Need help :)

I tried it backwards befor, no result.

 

In the device manager the "high definition audio" is shwon two times, first on path 2, second on path 0. Ist that ok?

Do you have another app. that is using sound?.

Not that I know of.

 

Finally i gave up and played back a True Image full system backup which i have done a few days before the sound problem. Sound is working again :D

 

Thanks for your effort anyway.

 

I guess some more people will have this problem soon.

 

 

hello,

I have the ame problem.  I'm close to trying to reinstall the whole OS.  Has anyone found a solution?

joseph