[alsa-devel] Regarding Sound on Acer Aspire 6935G

Takashi Iwai tiwai at suse.de
Tue Jun 9 12:52:20 CEST 2009

At Sat, 6 Jun 2009 14:58:47 -0300,
Emilio López wrote:
> Just tried with model acer-aspire-8930g on 1.0.20, it works the same as
> acer-aspire-4930g. Mic works, the "tuba" thing doesn't. Googling a bit I found
> that acer-aspire-8930g is for ALC889, but mine is ALC888.
> I attach alsa-info.txt for this new model, just in case it's useful.

OK, just to make things clear again:
you got the bass output controlled via "Side" volume when you pass
model=acer.  Now the driver takes model=acer-aspire-4930g as default,
and the bass doesn't work even if you change "Side" volume.


As far as I see, the connection of "Side" volume, i.e. the pin widget
0x0f, is also done for 4930g.  So, there should be anything else.

How about the patch below?  If it still doesn't work, please give both
the working (model=acer) and non-working (w/o model), on both "Side"
is set to the same level.



diff --git a/sound/pci/hda/patch_realtek.c b/sound/pci/hda/patch_realtek.c
index 337d2a5..372a02a 100644
--- a/sound/pci/hda/patch_realtek.c
+++ b/sound/pci/hda/patch_realtek.c
@@ -1467,6 +1467,9 @@ static struct hda_verb alc888_acer_aspire_4930g_verbs[] = {
 	{0x15, AC_VERB_SET_CONNECT_SEL, 0x00},
+        /* eanable EAPD? */
+	{0x20, AC_VERB_SET_COEF_INDEX, 0x07},
+	{0x20, AC_VERB_SET_PROC_COEF, 0x3050},
 	{ }

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