From mboxrd@z Thu Jan 1 00:00:00 1970 From: bugtrack@alsa-project.org Subject: [ALSA - driver 0001440]: headphone output loops to microphone input Date: Thu, 22 Sep 2005 00:13:28 +0200 Message-ID: Mime-Version: 1.0 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: 7bit Return-path: Received: from bugtrack.alsa-project.org (gate.perex.cz [82.113.61.162]) by alsa.jcu.cz (ALSA's E-mail Delivery System) with ESMTP id E330A176 for ; Thu, 22 Sep 2005 00:13:28 +0200 (MEST) Sender: alsa-devel-admin@lists.sourceforge.net Errors-To: alsa-devel-admin@lists.sourceforge.net List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , List-Archive: To: alsa-devel@alsa-project.org List-Id: alsa-devel@alsa-project.org The following issue has been SUBMITTED. ====================================================================== ====================================================================== Reported By: dyfrgi Assigned To: ====================================================================== Project: ALSA - driver Issue ID: 1440 Category: PCI - intel8x0 Reproducibility: always Severity: major Priority: normal Status: new Distribution: Gentoo Kernel Version: 2.6.13.1 ====================================================================== Date Submitted: 09-22-2005 00:13 CEST Last Modified: 09-22-2005 00:13 CEST ====================================================================== Summary: headphone output loops to microphone input Description: I cannot use the headphone port when using full duplex on my laptop. Here are four scenarios, and the results: 1. System speakers, no microphone plugged in RESULTS: When recording from the microphone input, there is no sound. As expected. 2. System speakers, microphone plugged in RESULTS: Only the sound that should be picked up by the microphone is recorded through the microphone input. As expected. 3. Headphones plugged in, microphone not plugged in. RESULTS: No sound when recording. As expected. 4. Headphones plugged in, microphone plugged in. RESULTS: Audio coming in through the microphone input is a combination of the expected audio and the audio that is being played through the headphone output. This is the problem. Could this be an ALSA issue, or should I have the laptop hardware looked at? I should note that this also happens if I use the OSS driver. That doesn't mean it's not a driver issue, though; it could be that some register is not being set up properly. The loopbacked volume is lower than if I set Mix or Mix Mono to be the capture channel. I'm using jaaa with noise output turned on to monitor. ====================================================================== Issue History Date Modified Username Field Change ====================================================================== 09-22-05 00:13 dyfrgi New Issue 09-22-05 00:13 dyfrgi Distribution => Gentoo 09-22-05 00:13 dyfrgi Kernel Version => 2.6.13.1 ====================================================================== ------------------------------------------------------- SF.Net email is sponsored by: Tame your development challenges with Apache's Geronimo App Server. Download it for free - -and be entered to win a 42" plasma tv or your very own Sony(tm)PSP. Click here to play: http://sourceforge.net/geronimo.php