Hello all,
I hope this is the right place to report this and ask for help: if not, I'd be glad of a pointers to any more appropriate forum.
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.
Although the port is listed, connections to it fail from all the software I've tried: qjackctl, a2jmidid and aconnect all fail to connect.
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"; and qjackctl reports no error but refuses to make the connection.
I've observed the problem in stable kernels 3.0.39 and 3.4.11; it works as expected when booted into a 2.6.32 kernel, where the snd_usb_audio driver is used for the UA-1000. Other USB MIDI devices appear to work fine with the newer kernels.
Incidentally, I also noticed that the 'Control' MIDI in & out of the UA-1000 no longer appear when using snd_ua101, but I don't think this is related, since changing the values of midi_ep.out_cables and midi_ep.in_cables to 3 in the ua101_probe() function in sound/usb/misc/ua101.c brings the control in & out back, but I'm still unable to connect the outputs.
Any help, suggestions, patches or requests for more details gratefully received!
Thank you,
Colin Fletcher.