Re: audio volume much lower with kernel 3.15

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On Wed, 03 Sep 2014 17:41:15 +0200 Takashi Iwai <tiwai@xxxxxxx> wrote:

> > > It's because the volume was overloaded in 3.14 and earlier.
> > 
> > I suspected so, because in Windows I get a lower volume too.
> > 
> > > It came through the mixer widget and it has the gain over 0dB.
> > > If you set 100% amp in the pin and sets more than 0dB in the mixer,
> > > it's basically more than 100%, overloading.
> > > 
> > > That is, the new driver corrected the wrong volume setup.
> > 
> > Is it possible to get the old volume level back by using a gnome/mate mixer
> > (actually the volume buttons Fn+F7/F8)?
> 
> No, not in that way.  Also it's not good for your hardware.  It can
> damage speakers easily.
> 
> If you still want it, you can touch directly the volume via hda-verb
> command.  First, change "Loopback" mixer enum to "Enabled" (e.g. via
> "alsamixer -c0").  Then change the amp of NID 0x17 to a higher value.
> For example, to really full volume (0x2b, 0x14 is 0dB):
>   hda-verb /dev/snd/hwC0D0 0x17 SET_AMP 0xb02b
> 
> But you were warned...

Thank you. I ran hda-verb /dev/snd/hwC0D0 0x17 SET_AMP 0xb02b (as root,
because as a user I got permsision denied), but the volume did not increase:

# hda-verb /dev/snd/hwC0D0 0x17 SET_AMP 0xb02b
nid = 0x17, verb = 0x300, param = 0xb02b
value = 0x0

The only way to increase volume is to use vlc and set the volume to 125%, but
it still too low and I can barely hear some movies. So is it possible to get the old
3.14 kernel volume back?

Regards,
Nerijus

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