Bug 963162 - "pop" noises from speakers on system shutdown, (HDA Intel, Realtek ALC269VC)
"pop" noises from speakers on system shutdown, (HDA Intel, Realtek ALC269VC)
Product: Fedora
Classification: Fedora
Component: alsa-lib (Show other bugs)
i686 Linux
unspecified Severity unspecified
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Assigned To: Jaroslav Kysela
Fedora Extras Quality Assurance
Depends On:
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Reported: 2013-05-15 05:42 EDT by Stephen Chen
Modified: 2014-02-05 16:22 EST (History)
1 user (show)

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Fixed In Version:
Doc Type: Bug Fix
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Clone Of:
Last Closed: 2014-02-05 16:22:33 EST
Type: Bug
Regression: ---
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RHEL 7.3 requirements from Atomic Host:
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Description Stephen Chen 2013-05-15 05:42:43 EDT
Description of problem:
(Thinkpad T430, HD Audio, Realtek ALC3202 sound card, Also known as ‘ALC269VC’)
whenever I shutdown laptop, I get a "cracking noise" from speakers before the machine actually powers off .

Version-Release number of selected component (if applicable):
Fedora 18 (Spherical Cow) 3.8.11-200.fc18.i686

How reproducible:

Steps to Reproduce:
1. Normal shutdown Fedora.
2. At the end of “shutdown”, pop noises from speakers.
Actual results:
Thera is  a loud crackling sound before the laptop actually powers off.

Expected results:
Laptop should shutdown quiet. as same as Windows7.

Additional info:
Introduce shutup callback to Realtek spec struct
Add shutup callback to be called codec-specifically for avoiding pop noises at suspend or shutdown. As a generic callback, just turn EAPD off. 

In /linux3.8/sound/pci/hda/patch_realtek.c, the callback only turn of  ALC269VB, but ALC269VA & ALC269VC also need turn off:

static void alc269_shutup(struct hda_codec *codec)
     struct alc_spec *spec = codec->spec;

     if (spec->codec_variant != ALC269_TYPE_ALC269VB)

     if (spec->codec_variant == ALC269_TYPE_ALC269VB)
          alc269vb_toggle_power_output(codec, 0);
     if (spec->codec_variant == ALC269_TYPE_ALC269VB &&
               (alc_get_coef0(codec) & 0x00ff) == 0x018) {

sorry for my poor English.
Comment 1 Fedora End Of Life 2013-12-21 08:32:36 EST
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Comment 2 Fedora End Of Life 2014-02-05 16:22:33 EST
Fedora 18 changed to end-of-life (EOL) status on 2014-01-14. Fedora 18 is
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