From mboxrd@z Thu Jan 1 00:00:00 1970 From: Jeffrey Baker Subject: Re: intel8x0, ad198x, no sound Date: Sun, 18 May 2003 13:27:06 -0700 Sender: alsa-devel-admin@lists.sourceforge.net Message-ID: <20030518202706.GA3466@noodles> References: <20030518194617.GA3302@noodles> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Transfer-Encoding: 7BIT Return-path: In-reply-to: <20030518194617.GA3302@noodles> Content-Disposition: inline Errors-To: alsa-devel-admin@lists.sourceforge.net List-Help: List-Post: List-Subscribe: , List-Unsubscribe: , List-Archive: To: alsa-devel@lists.sourceforge.net List-Id: alsa-devel@alsa-project.org On Sun, May 18, 2003 at 12:46:17PM -0700, Jeffrey Baker wrote: > This is related to the mail last week regarding the Asus P4PE with > ad1980 sound chip. I got an Asus P4P800 with the ad1985. The > intel8x0 driver works but there are problems with the sound routing. > There is no sound at all coming from the main (line out) output. > If I plug headphones into the line in jack, there is sound but it > appears to be some kind of surround output, because it lacks all low > frequencies entirely. No sound comes from the microphone jack. > > I think the problem may be related to the "intelligent" jack sensing > built into this hardware. It is supposed to be able to detect when > you've got your headphones plugged into the wrong jack and reroute > the audio. Either that, or the chip is stuck in some surround mode > that isn't quite working. Hi. It helps to read the datasheet. Although this isn't stated in the motherboard's documentation, the headphone amplifier is, in fact, connected to the line-in jack. There is a register (0x76) which controls the input for the headphone amp. It can be either 0 for the surround DAC or 1 for the mixer. By default it is 0. This explains why I am hearing high-passed surround audio from the headphones. I glanced at intel8x0.c, but it wasn't immediately obvious how to set registers on the codec. -jwb ------------------------------------------------------- This SF.net email is sponsored by: If flattening out C++ or Java code to make your application fit in a relational database is painful, don't do it! Check out ObjectStore. Now part of Progress Software. http://www.objectstore.net/sourceforge