From mboxrd@z Thu Jan 1 00:00:00 1970 From: Pavel Polischouk Subject: snd-usb-audio and M-Audio Quattro problems. Date: Tue, 21 Nov 2006 14:53:37 -0500 Message-ID: <45635941.70406@inbox.ru> Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Return-path: 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: alsa-devel@lists.sourceforge.net List-Id: alsa-devel@alsa-project.org Hi! I'm trying to make my Quattro work with ALSA 1.0.13. While this seems possible with some hacks, it's not a straightforward and hassle-free experience. I submitted a bug report on the matter some time ago (https://bugtrack.alsa-project.org/alsa-bug/view.php?id=2607), see there for detailed description. Short description: Quattro initializes itself to an unusable (or semi-usable) state and refuses to change its mode afterwards. After seeing no activity on the bug for some time I decided to investigate the problem further. First I tried to extend the Audiophile hack to Quattro (that disables all altsettings on driver init except the one desired). Surprisingly it worked - almost. It only works the first time after Quattro has been powered up, after that, re-loading the driver doesn't help - the device sticks to the old state. My temporary patch is available here: https://bugtrack.alsa-project.org/alsa-bug/file_download.php?file_id=1630&type=bug Are there any suggestions on how to make the device accept the changing settings? Perhaps there's a need for hardware reset or something similar between mode changes? Any suggestions/patches are appreciated. Thanks, Pavel ------------------------------------------------------------------------- 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