ALSA: hda - Disable power_save_node for IDT92HD71bxx

We've got a regression report that 4.1-rc causes noises on a Dell
laptop.  Similar like Realtek codec, this seems also triggered by the
recent power_save_node feature.  As this kind of issue is quite hard
to debug without actual hardware, disable the power_save_node flag for
this codec as a workaround.

Bugzilla: https://bugzilla.kernel.org/show_bug.cgi?id=98971
Signed-off-by: Takashi Iwai <tiwai@suse.de>

diff --git a/sound/pci/hda/patch_sigmatel.c b/sound/pci/hda/patch_sigmatel.c
index 0de0fd9..6833c74 100644 (file)
--- a/sound/pci/hda/patch_sigmatel.c
+++ b/sound/pci/hda/patch_sigmatel.c
@@ -4696,7 +4696,8 @@ static int patch_stac92hd71bxx(struct hda_codec *codec)
                return err;
 
        spec = codec->spec;
-       codec->power_save_node = 1;
+       /* disabled power_save_node since it causes noises on a Dell machine */
+       /* codec->power_save_node = 1; */
        spec->linear_tone_beep = 0;
        spec->gen.own_eapd_ctl = 1;
        spec->gen.power_down_unused = 1;