Hello ALSA developers,
I am having problems with the microphone on the following hardware this is on a Lenovo W500 laptop.
Card: HDA Intel Chip: Conexant CX20561 (Hermosa)
Here is the problems im noticing:
1) If I use ALSA 'default' with the microphone I get noise interference on output [high/low/high/low].
If I switch this to use the "ALSA Capture on HDA Intel [CONEXANT Analog] I get interference except it is the standard 60Hz electrical noise [steady noise]
2) Using the internal/external microphones gives an inconsistent volume. It also does not seem to work with the microphone cutting out so much. I need to adjust Digital + another microphone but it still drops capturing.
Alsamixer shows: Digital/Docking Microphone/External Microphone/Internal Microphone
Here is the module options I give to the sound driver:
options snd-intel-hda enable_msi=1 power_save=10 power_save_controller=true model=laptop index=0
Assuming power saving/controller causes the microphone to cut out or not.
3) I'm now aware that this card has no pinouts for PCM capture https://bugzilla.redhat.com/show_bug.cgi?id=502293
Thanks for any help, Shawn.