I have an Acer Aspire One D250 with Ubuntu Netbook Edition 10.10. The internal microphone is not working. What can I do to fix this?
Audio Device: N10/ICH 7 Family High Definition Audio Controller
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This is a known bug. You can follow the suggestion in comment #3:
Add the mentioned PPA to your system (using a terminal):
sudo apt-add-repository ppa:ubuntu-audio-dev
Update the package list:
sudo apt-get update
Install the mentioned package:
sudo apt-get install linux-alsa-driver-modules-$(uname -r)
Reboot and hope for the best.