If you are having trouble with your upgraded Fedora Core 3 – the MIDI no longer works, then your system may just be missing the synth module. The udev method seems to be to blame – some hardware drivers (in this case the MIDI sequencer) are not loaded until they are actually requested. Mumbo-jumbo, really, but there you have it.
After running a
modprobe snd_emu10k1_synth, I was then able to continue with my usual
sfxload to load the sound bank, and back to my normal guitar practice.
The problem has been reported to Redhat.