[alsa-devel] snd-hda-intel AD1981 - the microphone doesn't work

Grzegorz Chwesewicz grzegorz.chwesewicz at chilan.com
Tue Feb 19 15:12:50 CET 2008

Thursday 14 of February 2008 13:14:18 Takashi Iwai napisał(a):
> And, does a similar problem like Grzegorz's case occur on your laptop?
> Some HP laptops (so far, AMD SB450-based) occasionally cause a hang-up
> during recording from the mic when HD is accessed.  This is far more
> nasty problem, and it's interesting to know whether this happens on
> other chipset.

	Hi Takashi. I've experimented a little with power saving in HD Intel Audio. 
I've noticed that using power saving with timeout set to 10 sec. solves my 
problem partially. When arecord stops recording I can turn it off, wait 10 
seconds, and recording works back again. This is obvious, because power 
saving simply powers off and on device. I was wondering that maybe we can 
implement ioctl or something that will dump "state" (informations that will 
help in debuging) of device, when recording is not working, and "state" just 
after power on to compare what causes breakage ? Can you give me some tips 
about what informations are userful in debuging ?

Grzegorz Chwesewicz, Chilan 
mailto:grzegorz.chwesewicz at chilan.com

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