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