At Sun, 17 Aug 2008 22:07:19 +0300, ikke wrote: > > Hi, > > I'm having mic problems with snd_maestro3 and es1988 allegro hw. The > laptop is HP OmniBook Xe3. The mic is way too silent (unusable) even > with 20db boost option on. I found this seems to have been really > common problem, but only one came with a fix [1] to the problem, > enabling one more bit to volume control. Could someone please help me > apply that fix to current alsa? > > I tried compiling 2.6.26.2 kernel and made the first change of the > patch from mail [1] attachement [2]. No change. The second part of > patch I did not find anymore from the code. There are similar parts in > ac97_patch.c. Any hint what should be added there? Note that "Mic Playback Volume" controls only the volume of analog playback. It doesn't change the recording level at all. > The original patched code is somewhat outdated compared to modern > one... But 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. Takashi _______________________________________________ Alsa-devel mailing list Alsa-devel@xxxxxxxxxxxxxxxx http://mailman.alsa-project.org/mailman/listinfo/alsa-devel
