I can't get an output with the 4.x kernels from my Focuserite Scarlett 18i8 (USB), the device works fine with 3.x kernels. I don't see any difference with alsamixer, pulseaudio and jack settings, and input works with both.  lsmod for kernel 4.0.5-200.fc21.x86_64 inculdes snd_seq_midi_event, snd_seq_midi, and x86_pkg_temp_thermal not listed in 3.18.9-201.rt5.1.fc21.ccrma.x86_64+rt.  Is this a kernel bug or is there something I need to do?

-- Jeff