I'd like to use my MIDI usb keyboard, but when I run LMMS, it says:

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ALSA lib rawmidi_hw.c:233:(snd_rawmidi_hw_open) open /dev/snd/midiC0D0 failed: No such file or directory.
cannot open MIDI-device: No such file or directory.
Couldn't create MIDI-client, neither with ALSA nor with OSS. Will use dummy-MIDI-client.
The keyboard works fine otherwise, I use it through ALSA, connecting it with qjackctl to qsynth.