From mboxrd@z Thu Jan 1 00:00:00 1970 From: Takashi Iwai Subject: Re: usb-usx2y: playback fails with Tascam US122 on kernel 3.14 Date: Fri, 08 Aug 2014 08:13:38 +0200 Message-ID: References: <4546801.Z4WD7yaEHq@arial> <1799623.GgHbzoqWFu@arial> <53E2639A.4070506@zonque.org> Mime-Version: 1.0 (generated by SEMI 1.14.6 - "Maruoka") Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Return-path: Received: from mx2.suse.de (cantor2.suse.de [195.135.220.15]) by alsa0.perex.cz (Postfix) with ESMTP id A00EA2651A3 for ; Fri, 8 Aug 2014 08:13:38 +0200 (CEST) In-Reply-To: <53E2639A.4070506@zonque.org> 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: Daniel Mack Cc: alsa-devel@alsa-project.org, Dr Nicholas J Bailey List-Id: alsa-devel@alsa-project.org At Wed, 06 Aug 2014 19:19:22 +0200, Daniel Mack wrote: > > 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 Right. My guess is rather the changes in USB driver side. So, better to bisect in the full path, not limited to sound/*. Takashi > > 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 > > _______________________________________________ > Alsa-devel mailing list > Alsa-devel@alsa-project.org > http://mailman.alsa-project.org/mailman/listinfo/alsa-devel >