USB MIDI interfaces not working (kernel linux 4.0)

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eclepticbox
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USB MIDI interfaces not working (kernel linux 4.0)

Post by eclepticbox »

Hi, I'm trying Debian testing + KXStudio Repos, with Cakewalk UA-25EX and Edirol UM-1S USB interfaces. With the linux-image-4.0-amd64 I can't see the USB MIDI interfaces in Carla / Cadence / QJackctl. I'm using Cadence ALSA MIDI Bridge to export the hardware, anyway also starting JACK with ALSA MIDI drivers doesn't help. However UA-25EX audio ports are visible. The output of lsusb gives me both interfaces...
I tested also the realtime kernel linux-image-4.0-rt with the same issue.

The same setup was working with Debian Stable (kernel 3.16) and Ubuntu 14.04 (kernel 3.13).

Kernel issue or some missing package?
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sysrqer
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Re: USB MIDI interfaces not working (kernel linux 4.0)

Post by sysrqer »

I wonder if it's the same problem as this - https://bugs.archlinux.org/task/44286
Check your distro's documentation for auto loading the snd_seq_midi module.
DepreTux
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Re: USB MIDI interfaces not working (kernel linux 4.0)

Post by DepreTux »

I don't know how you do this in cadence, but in qjackctl, have you selected "seq" on the "MIDI driver" dropdown list?

Also, if you want to see your alsa midi devices on the jack midi tab you can use the snd_seq_dummy kernel module.

Good luck!

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eclepticbox
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Re: USB MIDI interfaces not working (kernel linux 4.0) [SOLV

Post by eclepticbox »

Yes, I have selected also "seq" on the "MIDI driver", but with no success. Hovewer, I use a2jmidid for exporting ALSA MIDI and hardware ports.

I think that I'm experimenting the same issue found in archlinux (snd_seq_midi not loaded), but I can't replicate the bug. Now, after installing but also removing the package kxstudio-default-settings (that sets up snd_seq_dummy with 16 ports), the snd_seq_midi is loaded and external MIDI is working. Not sure what I've done...but it works.
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Re: USB MIDI interfaces not working (kernel linux 4.0)

Post by khz »

Code: Select all

modprobe snd_seq
modprobe snd_seq_midi
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