linux-kernel - Re: hda_intel: too quiet sound (regression)

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Date:	Mon, 26 Jul 2010 16:48:20 +0200
From:	Jiri Slaby <jirislaby@...il.com>
To:	alsa-devel@...a-project.org
CC:	Jaroslav Kysela <perex@...ex.cz>, Takashi Iwai <tiwai@...e.de>,
	fengguang.wu@...el.com, LKML <linux-kernel@...r.kernel.org>
Subject: Re: hda_intel: too quiet sound (regression)

On 07/26/2010 04:42 PM, Jiri Slaby wrote:
> Hi,
> 
> after I upgraded from 2.6.34-rc5-mm1 to 2.6.35-rc5-mm1 (there were other
> issues in between them), the sound from my soundcard is very very quiet.
> 
> alsa-info:
> http://www.alsa-project.org/db/?f=dcadb29a2d5d047ecf5545792ac3239dc0c8c7f0
> 
> Any ideas?

I've just find out that whatever value 1-64 is set the Master control to
via amixer, it plays still the same. So the mixer (Master volume) is
somehow screwed up.

These two are the same volumes:
# amixer -D hw sset Master,0 64
Simple mixer control 'Master',0
  Capabilities: pvolume pvolume-joined pswitch pswitch-joined penum
  Playback channels: Mono
  Limits: Playback 0 - 64
  Mono: Playback 64 [100%] [0.00dB] [on]
# amixer -D hw sset Master,0 1
Simple mixer control 'Master',0
  Capabilities: pvolume pvolume-joined pswitch pswitch-joined penum
  Playback channels: Mono
  Limits: Playback 0 - 64
  Mono: Playback 1 [2%] [-47.25dB] [on]



This turns sound off, indeed:
amixer -D hw sset Master,0 0
Simple mixer control 'Master',0
  Capabilities: pvolume pvolume-joined pswitch pswitch-joined penum
  Playback channels: Mono
  Limits: Playback 0 - 64
  Mono: Playback 0 [0%] [-48.00dB] [on]

regards,
-- 
js
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