[linux-audio-dev] USB-MIDI Transfer rate

[Clemens Ladisch]

Jens M Andreasen wrote:
> I am running into troubles here. After reboot, the usb-midi goes
> haywire!? And I have not even done any changes to the system yet ...
>
> At first, I reboot with the usb device off and then have a peek:
>
> $ ls /dev/midi*
> /dev/midi1
>
> $ amidi -l
> Device    Name
> hw:1,0    MPU-401 MIDI 1-0
>
> .. which looks as expected. But then turning the device on gets weired:
>
> $ amidi -l
> Device    Name
> hw:1,0    MPU-401 MIDI 1-0
>
> ls /dev/midi*
> /dev/midi  /dev/midi1  /dev/midi2  /dev/midi3
>
> .. which is no good. The /dev/midi* devices are too many and not
> working.

It seems the usb-midi driver grabbed the device first.  Disable it in
the kernel configuration, or put the line

usb-midi

into the /etc/hotplug/blacklist file.


HTH
Clemens