From mboxrd@z Thu Jan 1 00:00:00 1970 From: Daniel Mack Subject: Re: usb-usx2y: playback fails with Tascam US122 on kernel 3.14 Date: Wed, 06 Aug 2014 19:19:22 +0200 Message-ID: <53E2639A.4070506@zonque.org> References: <4546801.Z4WD7yaEHq@arial> <1799623.GgHbzoqWFu@arial> Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Return-path: Received: from mail.zonque.de (svenfoo.org [82.94.215.22]) by alsa0.perex.cz (Postfix) with ESMTP id 57E3D261691 for ; Wed, 6 Aug 2014 19:19:26 +0200 (CEST) In-Reply-To: <1799623.GgHbzoqWFu@arial> List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: alsa-devel-bounces@alsa-project.org Sender: alsa-devel-bounces@alsa-project.org To: Dr Nicholas J Bailey , alsa-devel@alsa-project.org List-Id: alsa-devel@alsa-project.org On 08/06/2014 06:43 PM, Dr Nicholas J Bailey wrote: > On Thursday 26 June 2014 15:51:54 Dr Nicholas J Bailey wrote: >> I am having trouble with the US122 in playback and duplex mode. In capture >> mode, it is working. >> >> This problem occurs on (at least) >> Linux arial 3.14-1-686-pae #1 SMP Debian 3.14.7-1 (2014-06-16) i686 >> GNU/Linux >> > Further information: > > Using this kernel: > > Linux arial 3.14-2-686-pae #1 SMP Debian 3.14.13-2 (2014-07-24) i686 GNU/Linux > > trying to use the US-122 Tascam box results in the following showing up in > dmesg. I have unplugged and reconnected the box twice to get the LEDs to light > up. This has been the normal behaviour for as long as I can remember. You can > only use the Tascam as capture device on this kernel. > > Using this kernel: > > Linux arial 3.10.11 #1 SMP Wed Oct 2 19:26:59 BST 2013 i686 GNU/Linux > > the US-122 works fine for simultaneous capture and playback. > > I've looked at the difference in the source code between 3.10 and 4.14 and > there is very little in the usb-usx2y alsa module. Is there some midi-related > change I should know about? This driver is unfortunately poorly supported by the community. Very few people have such a device, the driver has ample areas it needs cleanups in, and the original author is unfortunately unresponsive. The best thing you can do is probably bisect the issue: https://wiki.ubuntu.com/Kernel/KernelBisection > I understand that the US-122 is a usb-1.1 device and I have the ehci module > loaded, but it was there too with the older kernel and that worked fine. Yes, that shouldn't be an issue. Let us know what the bisection tells you. Daniel