I have a wireless tablet (webdt310) http://dtresearch.com/product/wt310/index.htm It has cs5536 audio and a realtek alc203 codec. The headphone jack works perfectly, but the internal speaker was not. After a bit a twiddling and reading the ALC203 data sheet, I finally figured out that the function of Pin 37 had to be changed to MONO-OUT to get sound out of the internal speaker. I'm not sure that this is the best approach (maybe there could be some pin sensing?) but I added this as an ac97 quirk. Here's the patch. diff -rub linux-2.6.26.orig/sound/pci/ac97/ac97_codec.c linux-2.6.26.new/sound/pci/ac97/ac97_codec.c --- linux-2.6.26.orig/sound/pci/ac97/ac97_codec.c 2008-07-29 15:30:57.000000000 -0500 +++ linux-2.6.26.new/sound/pci/ac97/ac97_codec.c 2008-08-04 10:58:12.000000000 -0500 @@ -2709,6 +2710,12 @@ return snd_ctl_add(ac97->bus->card, snd_ac97_cnew(&snd_ac97_alc_jack_detect, ac97)); } +/* ac97 tune: turn on mono-out */ +static int tune_mono_out(struct snd_ac97 *ac97) +{ + snd_ac97_update_bits(ac97, 0x7a, 0x400, 0x400); + return 1; +} + /* ac97 tune: inversed EAPD bit */ static int tune_inv_eapd(struct snd_ac97 *ac97) { @@ -2801,6 +2808,7 @@ { "inv_eapd", tune_inv_eapd }, { "mute_led", tune_mute_led }, { "hp_mute_led", tune_hp_mute_led }, + { "mono_out", tune_mono_out }, }; _______________________________________________ Alsa-devel mailing list Alsa-devel@xxxxxxxxxxxxxxxx http://mailman.alsa-project.org/mailman/listinfo/alsa-devel
