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Subject[PATCH 4.14 10/29] ALSA: hda - Sleep for 10ms after entering D3 on Conexant codecs
4.14-stable review patch.  If anyone has any objections, please let me know.


From: Park Ju Hyung <>

commit f59cf9a0551dd954ad8b752461cf19d9789f4b1d upstream.

On rare occasions, we are still noticing that the internal speaker
spitting out spurious noises even after adding the problematic codec
to the list.

Adding a 10ms artificial delay before rebooting fixes the issue entirely.

Patch for Realtek codecs also adds the same amount of delay after
entering D3.

Signed-off-by: Park Ju Hyung <>
Cc: <>
Signed-off-by: Takashi Iwai <>
Signed-off-by: Greg Kroah-Hartman <>

sound/pci/hda/patch_conexant.c | 1 +
1 file changed, 1 insertion(+)

--- a/sound/pci/hda/patch_conexant.c
+++ b/sound/pci/hda/patch_conexant.c
@@ -225,6 +225,7 @@ static void cx_auto_reboot_notify(struct
snd_hda_codec_set_power_to_all(codec, codec->core.afg, AC_PWRST_D3);
snd_hda_codec_write(codec, codec->core.afg, 0,
+ msleep(10);

static void cx_auto_free(struct hda_codec *codec)

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