This is a note to let you know that I've just added the patch titled
ALSA: hda/realtek - Avoid invalid COEFs for ALC271X
to the 3.12-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
alsa-hda-realtek-avoid-invalid-coefs-for-alc271x.patch
and it can be found in the queue-3.12 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From d3c56568f43807135f2c2a09582a69f809f0d8b7 Mon Sep 17 00:00:00 2001
From: Takashi Iwai <tiwai@xxxxxxx>
Date: Mon, 3 Feb 2014 09:56:13 +0100
Subject: ALSA: hda/realtek - Avoid invalid COEFs for ALC271X
From: Takashi Iwai <tiwai@xxxxxxx>
commit d3c56568f43807135f2c2a09582a69f809f0d8b7 upstream.
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
Signed-off-by: Takashi Iwai <tiwai@xxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
sound/pci/hda/patch_realtek.c | 3 +++
1 file changed, 3 insertions(+)
--- a/sound/pci/hda/patch_realtek.c
+++ b/sound/pci/hda/patch_realtek.c
@@ -4152,6 +4152,9 @@ static void alc269_fill_coef(struct hda_
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);
Patches currently in stable-queue which might be from tiwai@xxxxxxx are
queue-3.12/alsa-hda-add-missing-mixer-widget-for-ad1983.patch
queue-3.12/alsa-hda-realtek-avoid-invalid-coefs-for-alc271x.patch
queue-3.12/alsa-usb-audio-add-missing-kconfig-dependecy.patch
queue-3.12/alsa-hda-fix-missing-vref-setup-for-mac-pro-1-1.patch
queue-3.12/alsa-hda-fix-silent-output-on-toshiba-satellite-l40.patch
queue-3.12/alsa-hda-improve-loopback-path-lookups-for-ad1983.patch
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