From mboxrd@z Thu Jan 1 00:00:00 1970 From: Colin Guthrie Subject: Re: alsactl adds volume controls? Date: Fri, 01 Oct 2010 09:19:02 +0100 Message-ID: <4CA59976.2020306@colin.guthr.ie> References: <4C7F6D5D.7020101@canonical.com> <4C7FB2CF.5060505@ladisch.de> <4C7FC85B.4000009@ladisch.de> <4CA46E98.10402@ladisch.de> <4CA4A844.7060403@colin.guthr.ie> <20100930164753.GB9431@sirena.org.uk> <4CA5834D.5030408@ladisch.de> Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Return-path: Received: from lo.gmane.org (lo.gmane.org [80.91.229.12]) by alsa0.perex.cz (Postfix) with ESMTP id 269B21039E2 for ; Fri, 1 Oct 2010 10:19:17 +0200 (CEST) Received: from list by lo.gmane.org with local (Exim 4.69) (envelope-from ) id 1P1apm-00035F-33 for alsa-devel@alsa-project.org; Fri, 01 Oct 2010 10:19:14 +0200 Received: from brent.tribalogic.net ([78.86.109.144]) by main.gmane.org with esmtp (Gmexim 0.1 (Debian)) id 1AlnuQ-0007hv-00 for ; Fri, 01 Oct 2010 10:19:14 +0200 Received: from gmane by brent.tribalogic.net with local (Gmexim 0.1 (Debian)) id 1AlnuQ-0007hv-00 for ; Fri, 01 Oct 2010 10:19:14 +0200 In-Reply-To: <4CA5834D.5030408@ladisch.de> List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: alsa-devel-bounces@alsa-project.org Errors-To: alsa-devel-bounces@alsa-project.org To: alsa-devel@alsa-project.org Cc: Takashi Iwai , Mark Brown List-Id: alsa-devel@alsa-project.org 'Twas brillig, and Clemens Ladisch at 01/10/10 07:44 did gyre and gimble: > Takashi Iwai wrote: >> Mark Brown wrote: >>> On Thu, Sep 30, 2010 at 04:09:56PM +0100, Colin Guthrie wrote: >>>> *shouldn't* use them, but at present it does and they *are* active and >>>> used, so it's not an issue for me), the problem is rather one of setting >>>> Master (not PCM) to 0% aka -46.5dB causes some kind of auto-mute that >>>> cuts off all sound. It shouldn't do that. >>> >>> Is this perhaps just an error in the TLV information - should it be >>> flagging that the minimim gain is mute but isn't? >> >> There is no clear (or consistent) definition in HD-audio codec, I guess. > > The HDA spec is quite clear that muting is done only with the mute bit. Good :) >> Some chips do mute at 0 and some not. > > Those that do are violating the specification. > > But we have to support them anyway. > Colin, please tell us the IDs of your codec so that we can add a TLV > workaround to the driver. I presume the alsa-info.sh output is sufficient here? http://colin.guthr.ie/alsa-info.txt snd_hda_intel : Intel Corporation|82801G (ICH7 Family) High Definition Audio Controller (vendor:8086 device:27d8 subv:1028 subd:01bd) (rev: 01) Many thanks Col -- Colin Guthrie gmane(at)colin.guthr.ie http://colin.guthr.ie/ Day Job: Tribalogic Limited [http://www.tribalogic.net/] Open Source: Mageia Contributor [http://www.mageia.org/] PulseAudio Hacker [http://www.pulseaudio.org/] Trac Hacker [http://trac.edgewall.org/]