Trouble with internal microphone and display

Hello together,
I just installed Arch on my Laptop yesterday. Everything works fine now, except for two things:
1) The internal microphone does not work at all. I already checked all settings in alsamixer/amixer and I also tried this, but it won't help.
2) After a reboot, the display brightness is always reduced. When I press the button to raise it again, nothning happens. When I press the button to lower it instead, it raises to the full brightness. This is a little strange and annoying, but not too important.
Does anyone have an idea how to fix that?
I would be grateful for any help.
cthl
EDIT:
I got the microphone working now, I was just a bit confused about the alsamixer/amixer settings.
Last edited by cthl (2013-11-03 17:20:28)

WonderWoofy wrote:Is that feedback? Are you sure it is not just the hum of your machine? I think of feedback as the screech you get when your mic actually starts picking up the output of the speakers.
Perhaps you're right - if so, I certainly didn't get as much background noise before. Any idea how to improve the situation?

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