Originally Posted by mich43L
Couple of updates:
On a barebones system (no drivers either), there is no humming because there is no audio driver of anykind. Once you install the C-Major driver, the humming appears. So that's that.
I physically took out the modem. It made not difference, the humming is still there.
The humming stays the same whether running on battery or AC.
Someone from the official dell forums suggested to install the realtek ac'97 audio drivers:
Direct download link: ftp://184.108.40.206/pc/ac97/alc650/wdm_a370.exe
I don't know if they're the same as dell's, are official, if they work, or take care of the problem. I haven't tried them yet.
EDIT: WARNING: I JUST TRIED THEM AND THEY YIELD A BSOD. WINDOWS SAYS THEY DID NOT PASS THEIR LOGO TESTING.
I too got the BSOD. In addition, after restarting, windows reports that the audio device is not installed but I >still< get the annoying headphone noise. It does show the driver listed though...