Re: maestro3 & es1988: mic range too low

On Mon, Aug 18, 2008 at 3:42 PM, Takashi Iwai <tiwai <at> suse.de> wrote:
> At Mon, 18 Aug 2008 15:28:00 +0300,
> Ilkka Tengvall wrote:
>>
>> >> the reasoning for the original patch sounds reasonable. The
>> >> mic volume is tunable, only at the very low range. I recall the laptop
>> >> came with Win98, and there was no problem then with the sound -> not a
>> >> HW problem. I have never got this laptop mic working with linux, so
>> >> this is not anything that broke recently. I see there is
>> >> check_volume_resolution function which tries to guess some of the
>> >> register ranges, but maybe it get's it wrong with this HW.
>> >
>> > Maybe, maybe not.  You should check rather ac97 registers in
>> > /proc/asound/card0/codec97#0/ac97#0-0+regs.  If build with
>> > CONFIG_SND_DEBUG=y, you can write to the register directly, too.
>> > See Documentaiton[/sound/alsa]/Procfile.txt.
>> >
>>
>> I checked this file. It seems it gets the regs right for the mic
>> (range 0x1f). The capture range is 0xf. I don't have the specs to
>> compare it against, so I assume there is nothing to do more here.
>
> Which registers, exactly?

The ones affected by changing mic volume and capture in alsamixer,
those I that I pasted the diffs of previously. In alsamixer it has
slider for mic volume, and capture volume. And mic can be set as
capture device. In code (which the patch touched) it speaks about "Mic
Capture Volume", that made me think it would affect the volume used
for capturing (recording?) mic.