http://git.alsa-project.org/?p=alsa-
kmirror.git;a=commitdiff_plain;h=bb9a16dc52281d98dfb525552d29d8939845d8e2
it was this patch change master mono from mono to stereo
/* build master mono controls */
if (snd_ac97_try_volume_mix(ac97, AC97_MASTER_MONO)) {
- if ((err = snd_ctl_add(card,
snd_ac97_cnew(&snd_ac97_controls_master_mono[0], ac97))) < 0)
+ if ((err = snd_ac97_cmix_new(card, "Master Mono Playback",
AC97_MASTER_MONO, ac97)) < 0)
return err;
- if ((err = snd_ctl_add(card, kctl =
snd_ac97_cnew(&snd_ac97_controls_master_mono[1], ac97))) < 0)
- return err;
- snd_ac97_change_volume_params1(ac97, AC97_MASTER_MONO, &max);
- kctl->private_value &= ~(0xff << 16);
- kctl->private_value |= (int)max << 16;
- snd_ac97_write_cache(ac97, AC97_MASTER_MONO, 0x8000 | max);
}
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https://bugs.launchpad.net/bugs/1487168
Title:
[Emulated AD1980 AC97 inside Virualbox 5.0, playback] volume slider
problem
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