From mboxrd@z Thu Jan 1 00:00:00 1970 From: "Shem Multinymous" Subject: Re: [ibm-acpi-devel] Adding a alsa mixer interface to ibm-acpi Date: Wed, 7 Mar 2007 18:41:26 -0500 Message-ID: <41840b750703071541x1bb60a2ch2aad519e9a7fd63c@mail.gmail.com> References: <20070225012017.GA19039@khazad-dum.debian.net> <20070226162819.GE2909@khazad-dum.debian.net> <20070226174145.GF2909@khazad-dum.debian.net> <20070227015024.GF8154@thunk.org> <20070227021402.GC6828@khazad-dum.debian.net> <41840b750703071512o1d171dfy9d2a615382e5e635@mail.gmail.com> <1173309834.4531.22.camel@razman.gruemaster.com> Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Return-path: In-Reply-To: <1173309834.4531.22.camel@razman.gruemaster.com> Content-Disposition: inline List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: alsa-devel-bounces@lists.sourceforge.net Errors-To: alsa-devel-bounces@lists.sourceforge.net To: Tobin Davis Cc: Takashi Iwai , ibm-acpi-devel@lists.sourceforge.net, alsa-devel@lists.sourceforge.net, Theodore Tso List-Id: alsa-devel@alsa-project.org On 3/7/07, Tobin Davis wrote: > On Wed, 2007-03-07 at 18:12 -0500, Shem Multinymous wrote: > > The ibm-acpi mixer also affects the BIOS-generated sounds (e.g., > low-battery warnings) and PC speaker. So it useful even when the sound > card is unused or unsupported. > > Don't those sounds go through the beep generator? Most codecs use a beep > generator for system sounds, that routes through the codec. In my ThinkPad the system sound volume is affected by ibm-acpi but not by any ALSA mixer settings. As far as I can tell, it behaves as if AC'97 (including all ALSA mixers) and system sound are generated independently, added together, and then scaled by the ibm_acpi mixer. Shem ------------------------------------------------------------------------- Take Surveys. Earn Cash. Influence the Future of IT Join SourceForge.net's Techsay panel and you'll get the chance to share your opinions on IT & business topics through brief surveys-and earn cash http://www.techsay.com/default.php?page=join.php&p=sourceforge&CID=DEVDEV