Leann,
I did try your solution above, and it does work to a certain extent.
With the HAL policy file you propose, the microphone work just fine: you
can record sound using arecord, Sound Recorder, etc. However, once the
camera have been used once, the microphone stop working.
Step to reproduce:
1. Create the /etc/hal/fdi/policy/ignore-17ef7802.fdi as Leann explained
above. Restart hald or reboot.
2. With the webcam plugged in, try recording sound using arecord, such as:
arecord -Dhw:1,0 -d 3 -f cd -t wav test.wav
You may also use Sound recorder. You can use the webcam microphone at
will, it works continuously.
3. Use an application that access the camera, such as VLC or MPlayer. For
example:
vlc v4l:// :v4l-vdev="/dev/video0"
or:
mplayer tv:// -tv driver=v4l
Notice that, in both example above, we are not even have to be using the
webcam mic. If we do specify the webcam microphone (ie, using argument
:v4l-adev="/dev/dsp1" to vlc), sound is captured just fine from the
webcam microphone.
4. Try arecord again, and notice you get the IO error:
ubu...@ubuntu-laptop:~$ arecord -Dhw:1,0 -d 3 -f cd -t wav test.wav
Recording WAVE 'test.wav' : Signed 16 bit Little Endian, Rate 44100 Hz, Stereo
arecord: pcm_read:1347: read error: Input/output error
5. If you unplug/replug the camera, state is reset so that the microphone just
fine until the camera is accessed, at which point you get the IO error (just
like above).
So, it seems like the webcam microphone work just fine until the camera is
accessed, after which the microphone stop working. Maybe the camera driver
(gspca) leave the device in a state broken in such a way that the microphone is
not usable? It may also explain why the microphone would not work when hald is
running; perhaps hald is opening/querying the camera in a way that break the
microphone function of the device. It would also explain why
unplugging/replugging the webcam "fix" the microphone (at least, until the
camera is accessed).
--
Built-in microphone on Lenovo USB webcam doesn't work when hald is running
https://bugs.launchpad.net/bugs/310760
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