I've been having great success with kernel 2.6.13.1 and realtime-preempt (patch rt6). However... When I tried to hook up my MIDI keyboard via an external USB-MIDI device I no longer see any midi-ports. The kernel does see the event though: =========================================================== Sep 13 19:59:04 localhost kernel: usb 2-1: new full speed USB device using uhci_hcd and address 7 Sep 13 19:59:04 localhost kernel: usbaudio: device 7 audiocontrol interface 0 has only 1 altsetting. Sep 13 19:59:04 localhost kernel: usbaudio: device 7 audiocontrol interface 0 has 0 input and 0 output AudioStreaming interfaces Sep 13 19:59:04 localhost kernel: midi: probe of 2-1:1.0 failed with error -5 Sep 13 19:59:04 localhost kernel: usb-midi: Found MIDISTREAMING on dev 0a92:1010, iface 1 Sep 13 19:59:04 localhost kernel: usb-midi: Found MIDIStreaming device corresponding to Release 1.00 of spec. Sep 13 19:59:04 localhost kernel: usb-midi: Found IN Jack 0x01 EMBEDDED Sep 13 19:59:04 localhost kernel: usb-midi: Found IN Jack 0x05 EMBEDDED Sep 13 19:59:04 localhost kernel: usb-midi: Found IN Jack 0x02 EXTERNAL Sep 13 19:59:04 localhost kernel: usb-midi: Found OUT Jack 0x03 EMBEDDED, 1 pins Sep 13 19:59:04 localhost kernel: usb-midi: Found OUT Jack 0x04 EXTERNAL, 1 pins Sep 13 19:59:04 localhost kernel: usb-midi: Found OUT Jack 0x08 EXTERNAL, 1 pins Sep 13 19:59:04 localhost kernel: midi: probe of 2-1:1.1 failed with error -5 ============================================================== It turns out that if I unplug my USB-mouse it won't get reconnected either, so it seems to be a general USB problem. I didn't have USB problems with earlier kernels. Peter
