When drivers load in the system (I guess you have hardware drivers

> built as modules, as opposed to built-in to the kernel?) they will
> start exercising their respective hardware devices.
>

Actually, I've been troubleshooting from the livecd. I guess one of the
modules it loads causes this.


> It could be something simpler as well, some signals that are simply
> being coupled onto analog output.
>
> To say any more you need to find which driver is causing this. Mike's
> advice is the start; find out which drivers coldplugging loads, then
> e.g. load one at a time manually. At some point you should get the
> noise. Then dive deeper into that particular driver case.
>
OK, how do I find out which drivers coldplugging loads?

-- 
Colleen Josephson
Dept. of Electrical Engineering and Computer Science
Massachusetts Institute of Technology
Class of 2013