> I'll do some tests the next days. Maybe I'll wait because I > just ordered a new USB-MIDI-Patchbay and I'd like to do the > tests with it, so I can ensure it does not depend on my > current Edirol UM-1S. Rrrrrr. I wanted to do some test cases, but of course everything behaved as *un*expected: it simply worked ;-) . All SysEx events have been properly received, even after a reboot, even with plugged in devices during boot time and even with not plugged in devices. If it were a kernel bug, it will be difficult to find if it only happens in certain conditions. If it appears again, I'll do some further testing. Thanks & best regards ce