Do you have sound working? If you also don't have sound working, try the
following:
Open the file /etc/modrobe.d/alsa-base.conf in an editor, and find this
line:
options snd-hda-intel power_save=10 power_save_controller=N
And add "model=mb5" to the end of the line, like this:
options snd-hda-intel power_save=10 power_save_controller=N model=mb5
Then reboot your machine.
If you have sound working, but you don't have microphone working, then I
suggest you try installing the package linux-backports-modules-alsa-
karmic-generic and rebooting. If the microphone still doesn't work, then
work needs to be done to make it function correctly that has to be done
in the driver code.
affects ubuntu/alsa-driver
status incomplete
** Changed in: alsa-driver (Ubuntu)
Status: New => Incomplete
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microphone not working in macbook pro
https://bugs.launchpad.net/bugs/484124
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