I have a Toshiba L745D (AMD A6-3400M). I cannot get my internal mic to work.
My sound card: Conexant CX20585
I've tried this:
echo "options snd-hda-intel model=thinkpad" | sudo tee -a /etc/modprobe.d/alsa-base.conf
echo "options snd-hda-intel model=ideapad" | sudo tee -a /etc/modprobe.d/alsa-base.conf
echo "options snd-hda-intel model=asus" | sudo tee -a /etc/modprobe.d/alsa-base.conf
...but that didn't work either. Apparently that works for different notebook models with the same sound card. I also tried muting the right mic channel; that also worked for someone on a different model.
Here is my ALSA information:
http://www.alsa-project.org/db/?f=6b57a7faecf5525ccb5212a6f60ee9d1bc792838
Any solutions out there?