ALSA: Fix AC97 power down
Some laptops don't like PR3 powerdown. Do PR3 powerdown only
for the real power-saving.
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Signed-off-by: Jaroslav Kysela <perex@perex.cz>
diff --git a/sound/pci/ac97/ac97_codec.c b/sound/pci/ac97/ac97_codec.c
index 2d2f16e..07364c0 100644
--- a/sound/pci/ac97/ac97_codec.c
+++ b/sound/pci/ac97/ac97_codec.c
@@ -2295,9 +2295,11 @@
power |= AC97_PD_PR0 | AC97_PD_PR1; /* ADC & DAC powerdown */
snd_ac97_write(ac97, AC97_POWERDOWN, power);
udelay(100);
- power |= AC97_PD_PR2 | AC97_PD_PR3; /* Analog Mixer powerdown */
+ power |= AC97_PD_PR2; /* Analog Mixer powerdown (Vref on) */
snd_ac97_write(ac97, AC97_POWERDOWN, power);
if (ac97_is_power_save_mode(ac97)) {
+ power |= AC97_PD_PR3; /* Analog Mixer powerdown */
+ snd_ac97_write(ac97, AC97_POWERDOWN, power);
udelay(100);
/* AC-link powerdown, internal Clk disable */
/* FIXME: this may cause click noises on some boards */