Microphone no longer working
Derek Croxton
dcroxton at oxenstierna.homelinux.net
Wed Sep 12 01:56:59 UTC 2007
My microphone stopped working sometime; I'm not sure exactly when,
because I don't use it that often, but I first noticed it yesterday.
Sound plays fine. The mic is hard to test because gnome-sound-recorder
crashes (segmentation fault) when I try to record, and Audacity gives me
the "can't open input device" error. (I noticed the problem when I tried
to use Gizmo.)
In accordance with the "Comprehensive Sound Problem Solution Guide," I
have done the following:
* Checked that the microphone is not muted and has volume up
* Re-installed linux-sound-base, alsa-base, and alsa-utils
* Tried to recompile the drivers from the ALSA project, but got errors
I've also tried with and without esd and jack running. I have an
intel8x0 chipset soundcard, with an mpu401 chipset also on a Hauppauge
tv capture card. (I've never had a problem with the sound getting mixed
up between the cards before.) Here is what I get from "arecord -l":
**** List of CAPTURE Hardware Devices ****
card 0: I82801DBICH4 [Intel 82801DB-ICH4], device 0: Intel ICH [Intel
82801DB-ICH4]
Subdevices: 1/1
Subdevice #0: subdevice #0
card 0: I82801DBICH4 [Intel 82801DB-ICH4], device 1: Intel ICH - MIC ADC
[Intel 82801DB-ICH4 - MIC ADC]
Subdevices: 1/1
Subdevice #0: subdevice #0
card 0: I82801DBICH4 [Intel 82801DB-ICH4], device 2: Intel ICH - MIC2
ADC [Intel 82801DB-ICH4 - MIC2 ADC]
Subdevices: 1/1
Subdevice #0: subdevice #0
card 0: I82801DBICH4 [Intel 82801DB-ICH4], device 3: Intel ICH - ADC2
[Intel 82801DB-ICH4 - ADC2]
Subdevices: 1/1
Subdevice #0: subdevice #0
I'm a bit puzzled by the presence of two entries for microphones. It
doesn't make any sense to me, but maybe it is some technical thing that
I don't understand. When I run alsamixer (but not alsamixergui or the
gnome alsa mixer), there is a column labelled "Mic Sele" that shows
"Mic2" above it; I haven't figured out how to change it.
I tried to test recording using arecord, but nothing happened (the file
was not even created). I figured this might be because I didn't specify
a device, but I couldn't figure out the name of the microphone devices
revealed in "arecord -L".
As always, any help is appreciated. It's almost more frustrating that it
used to work fine, since I know there is some configuration thing I can
change to make it work, I just don't have any idea what it is.
--
Sincerely,
Derek
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