Commit d2e92709 authored Oct 30, 2013 by Takashi Iwai

ALSA: hda - Disable AA-loopback on ALC283 Chromebook



ALC283-based Chromebook suffers from occasional white noise, and it
turned out that this comes from AA-loopback.  Disable this output path
by just clearing mixer_nid, then the generic parser will skip the
creation of AA-loopback path.

Reported-and-tested-by: Kailang Yang <kailang@realtek.com>
Signed-off-by: Takashi Iwai <tiwai@suse.de>

parent 9cd5ab9c

sound/pci/hda/patch_realtek.c

+2 −0

Original line number	Diff line number	Diff line
		@@ -3445,6 +3445,8 @@ static void alc283_fixup_chromebook(struct hda_codec *codec,
		switch (action) {
		case HDA_FIXUP_ACT_PRE_PROBE:
		alc283_chromebook_caps(codec);
		/* Disable AA-loopback as it causes white noise */
		spec->gen.mixer_nid = 0;
		spec->gen.hp_automute_hook = alc283_hp_automute_hook;
		/* MIC2-VREF control */
		/* Set to manual mode */