From mboxrd@z Thu Jan 1 00:00:00 1970 From: Colin Fletcher Subject: Re: Can't connect to MIDI output of Edirol UA-1000 Date: Thu, 15 Nov 2012 13:15:50 +0000 Message-ID: <50A4EB06.1030404@googlemail.com> References: <50587F96.8080005@googlemail.com> <505883EA.6070808@ladisch.de> <5058898C.6020608@googlemail.com> <50588FE8.4070206@googlemail.com> Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii"; Format="flowed" Content-Transfer-Encoding: 7bit Return-path: Received: from mail-we0-f179.google.com (mail-we0-f179.google.com [74.125.82.179]) by alsa0.perex.cz (Postfix) with ESMTP id 6F9E1265B59 for ; Thu, 15 Nov 2012 14:15:53 +0100 (CET) Received: by mail-we0-f179.google.com with SMTP id z49so538701wey.38 for ; Thu, 15 Nov 2012 05:15:53 -0800 (PST) In-Reply-To: <50588FE8.4070206@googlemail.com> 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: Clemens Ladisch Cc: alsa-devel@alsa-project.org List-Id: alsa-devel@alsa-project.org On 18/09/12 16:14, Colin Fletcher wrote: > On 18/09/12 15:47, Colin Fletcher wrote: >> On 18/09/12 15:23, Clemens Ladisch wrote: >>> Colin Fletcher wrote: >>>> I've just recently noticed that connections to the MIDI output >>>> of my Edirol UA-1000 fail when using the snd_ua101 driver in >>>> recent kernels. >>>> >>>> aconnect simply reports "Connection failed (Input/output >>>> error)"; a2jmidid -e says "ERROR: a2j_port_create: >>>> snd_seq_connect_to() for 20:0 failed with error -5" >>> >>> Are there any error messages in the system log? >>> >> >> Hi Clemens, >> >> Not a squeak in/var/log/syslog or /var/log/messages when I try to >> connect using aconnect, no. Can you think of anywhere else I might >> look? >> >> Colin. > > Just a little more info: 'strace aconnect 20:0 20:0' shows that the > SNDRV_SEQ_IOCTL_SUBSCRIBE_PORT ioctl on "/dev/snd/seq" is the thing > which is giving the EIO error. > Hello Clemens, I wondered whether what you said about a problem with the US-122 MIDI out [1] was the same problem as mine. with the UA-1000, so I tried kernels 2.6.38.8 and 2.6.39. With kernel 2.6.38.8, aconnect can connect to the MIDI out of my UA-1000; with 2.6.39, it fails, so it seems likely that it is the same bug. Would a bisection between these kernels be useful, or do you have an idea already of what might have caused this regression? Colin Fletcher. [1] http://www.spinics.net/linux/fedora/alsa-user/msg11499.html