linux-kernel - Re: No mixers on ATI RS780 Azalia

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Message-ID: <s5hmxvmzwwd.wl%tiwai@suse.de>
Date:	Wed, 26 May 2010 14:10:26 +0200
From:	Takashi Iwai <tiwai@...e.de>
To:	Jan Engelhardt <jengelh@...ozas.de>
Cc:	alsa-devel@...a-project.org,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
	perex@...ex.cz
Subject: Re: No mixers on ATI RS780 Azalia

At Wed, 26 May 2010 14:04:27 +0200 (CEST),
Jan Engelhardt wrote:
> 
> Hi,
> 
> 
> I have here a Samsung 320MXn2 monitor/mainboard (typical x86_64 
> environment) where I cannot get sound output to the internal speakers 
> working.
> 
> To start, there seem to be two sound cards:
> 
> lspci/lspci -n:
> 00:14.2 Audio device: ATI Technologies Inc SBx00 Azalia (Intel HDA)
> 01:05.1 Audio device: ATI Technologies Inc RS780 Azalia controller
> 00:14.2 0403: 1002:4383
> 01:05.1 0403: 1002:960f
> 
> /proc/asound/cards:
>  0 [SB  ]: HDA-Intel - HDA ATI SB
>            HDA ATI SB at 0xf0500000 irq 16
>  1 [HDMI]: HDA-Intel - HDA ATI HDMI
>            HDA ATI HDMI at 0xf0110000 irq 19
> 
> The soundcard responsible for the internal speaker is the 01:05.1/"HDMI" 
> one.

Hmm?  HDMI output as the "internal" speaker is abnormal.

> Under Windows XP, I see the following mixer elements for it:
> 
>  * Master Volume
>  * Wave
>  * SW Synth
>  * CD Player
> 
> Subsequently, there is sound (once I bump the volumes on these).

There are definitely for the onboard sound, not for HDMI.

> However, in Linux up to including 2.6.34, I only see a single mixer 
> element:
> 
>  * IEC958/S/PDIF

That's correct for HDMI.  HDMI has no volume control - it's a digital
output.

> mplayer etc. all successfully write to the device, but since there are 
> not any further mixer controls, I can't unmute the essential channels.
> 
> alsa-utils is version 1.0.21, from openSUSE 11.2 x86_64.

Judging from your description, the problem is likely that the onboard
sound device isn't set up properly but only HDMI one.  Please give
alsa-info.sh output running on your system (run with --no-upload
option) for further analysis.


Takashi
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