Hi.
I'm having the same issue.
In my case, when the driver loads, my microphone gain settings is set to max, wich is causing microphone feedback problem.
I booted with my headphones, and changed in the HDA pannel my microfone gain to none. Problem solved.
BUT, everytime I boot, I need to boot with my headphones, coz the gain is aways set to max when booting and returns to none (the way i set it) when logged into the SO.
Does anyone know how to change the kext so it loads with no gain to my microphone?
Tnks,
TC.