[alsa-devel] Microphone detected, but no output for all ASUS G751xx with ALC668 chipset

[Takashi Iwai]

On Fri, 05 Oct 2018 12:10:52 +0200,
Håvard wrote:
> 
> I'll try to answer your previous email first.
> 
> Everything seems identical to how it was in the 4.18-gentoo kernel when not
> setting the model=alc668-headset option
> 
> And using the trick we found:
> 
> ./hda-verb /dev/snd/hwC0D0 0x20 0x500 0xc3
> ./hda-verb /dev/snd/hwC0D0 0x20 0x440 0x00

OK, then the following patch may work.  Give it a try.


> Made it so loopback worked perfectly fine for both earpieces.
> 
> One curiosity however (this is just a small thing) is that the "base" mic
> level is far lower than when the "Mic" option in alsamixer is set to 100. I
> don't know if it was this way in 4.18-gentoo, but that's the only thing
> that doesnt seem correct.
> Here is a screenshot explaining it:
> http://i.imgur.com/dKPELX6.png

The Mic volume is only for analog loopback, so it can be normal.


Takashi

---
--- a/sound/pci/hda/patch_realtek.c
+++ b/sound/pci/hda/patch_realtek.c
@@ -7738,6 +7738,7 @@ enum {
 	ALC662_FIXUP_ASUS_Nx50,
 	ALC668_FIXUP_ASUS_Nx51_HEADSET_MODE,
 	ALC668_FIXUP_ASUS_Nx51,
+	ALC668_FIXUP_ASUS_G751,
 	ALC891_FIXUP_HEADSET_MODE,
 	ALC891_FIXUP_DELL_MIC_NO_PRESENCE,
 	ALC662_FIXUP_ACER_VERITON,
@@ -8007,6 +8008,14 @@ static const struct hda_fixup alc662_fixups[] = {
 		.chained = true,
 		.chain_id = ALC668_FIXUP_ASUS_Nx51_HEADSET_MODE,
 	},
+	[ALC668_FIXUP_ASUS_G751] = {
+		.type = HDA_FIXUP_VERBS,
+		.v.verbs = (const struct hda_verb[]) {
+			{ 0x20, AC_VERB_SET_COEF_INDEX, 0xc3 },
+			{ 0x20, AC_VERB_SET_PROC_COEF, 0x4000 },
+			{}
+		},
+	},
 	[ALC891_FIXUP_HEADSET_MODE] = {
 		.type = HDA_FIXUP_FUNC,
 		.v.func = alc_fixup_headset_mode,
@@ -8080,6 +8089,7 @@ static const struct snd_pci_quirk alc662_fixup_tbl[] = {
 	SND_PCI_QUIRK(0x1043, 0x11cd, "Asus N550", ALC662_FIXUP_ASUS_Nx50),
 	SND_PCI_QUIRK(0x1043, 0x13df, "Asus N550JX", ALC662_FIXUP_BASS_1A),
 	SND_PCI_QUIRK(0x1043, 0x129d, "Asus N750", ALC662_FIXUP_ASUS_Nx50),
+	SND_PCI_QUIRK(0x1043, 0x12ff, "ASUS G751", ALC668_FIXUP_ASUS_G751),
 	SND_PCI_QUIRK(0x1043, 0x1477, "ASUS N56VZ", ALC662_FIXUP_BASS_MODE4_CHMAP),
 	SND_PCI_QUIRK(0x1043, 0x15a7, "ASUS UX51VZH", ALC662_FIXUP_BASS_16),
 	SND_PCI_QUIRK(0x1043, 0x177d, "ASUS N551", ALC668_FIXUP_ASUS_Nx51),
@@ -8184,6 +8194,7 @@ static const struct hda_model_fixup alc662_fixup_models[] = {
 	{.id = ALC668_FIXUP_DELL_XPS13, .name = "dell-xps13"},
 	{.id = ALC662_FIXUP_ASUS_Nx50, .name = "asus-nx50"},
 	{.id = ALC668_FIXUP_ASUS_Nx51, .name = "asus-nx51"},
+	{.id = ALC668_FIXUP_ASUS_G751, .name = "asus-g751"},
 	{.id = ALC891_FIXUP_HEADSET_MODE, .name = "alc891-headset"},
 	{.id = ALC891_FIXUP_DELL_MIC_NO_PRESENCE, .name = "alc891-headset-multi"},
 	{.id = ALC662_FIXUP_ACER_VERITON, .name = "acer-veriton"},