How to import midi files, but in Linux, and just get sound?

I have FluidSynth installed. I know Renoise knows it exists because I can see that in the console output. But it doesn’t show up in the midi devices in the Load File With Options menu. When I load the midi file, I get a bunch of blank tracks with no note data. There are blank midi instruments and I assigned presets to them but I don’t get any sounds when I press play because there is no note data.

How do I get note data to import?

Sometimes when importing MIDI data, the Instrument volume gets set to -INF.
-INF dB instrument

In the right top section, underneath the instrument list.

Note data is imported to the current position in the Patttern Editor.
Most MIDI files show up their note data in the Pattern Matrix on the left expandable section.