I updated my MIDI View program. Use this program to verify that your midi hardware works with linux. It doesn't bother with any "connections" crap. If Midi View can't find your MIDI device, then linux doesn't support your device.
https://sourceforge.net/p/midiview/code/ci/master/tree/
updated MIDI View
Moderators: raboof, MattKingUSA, khz
updated MIDI View
Author of BackupBand at https://sourceforge.net/projects/backupband/files/
My fans show their support by mentioning my name in their signature.