From d3c56568f43807135f2c2a09582a69f809f0d8b7 Mon Sep 17 00:00:00 2001 From: Takashi Iwai Date: Mon, 3 Feb 2014 09:56:13 +0100 Subject: [PATCH] ALSA: hda/realtek - Avoid invalid COEFs for ALC271X We've seen often problems after suspend/resume on Acer Aspire One AO725 with ALC271X codec as reported in kernel bugzilla, and it turned out that some COEFs doesn't work and triggers the codec communication stall. Since these magic COEF setups are specific to ALC269VB for some PLL configurations, the machine works even without these manual adjustment. So, let's simply avoid applying them for ALC271X. Bugzilla: https://bugzilla.kernel.org/show_bug.cgi?id=52181 Cc: Signed-off-by: Takashi Iwai --- sound/pci/hda/patch_realtek.c | 3 +++ 1 file changed, 3 insertions(+) diff --git a/sound/pci/hda/patch_realtek.c b/sound/pci/hda/patch_realtek.c index 56a8f18..e16a71e 100644 --- a/sound/pci/hda/patch_realtek.c +++ b/sound/pci/hda/patch_realtek.c @@ -4427,6 +4427,9 @@ static void alc269_fill_coef(struct hda_codec *codec) if (spec->codec_variant != ALC269_TYPE_ALC269VB) return; + /* ALC271X doesn't seem to support these COEFs (bko#52181) */ + if (!strcmp(codec->chip_name, "ALC271X")) + return; if ((alc_get_coef0(codec) & 0x00ff) < 0x015) { alc_write_coef_idx(codec, 0xf, 0x960b); -- 2.7.4