On Monday 22 November 2004 19:26, Christoph Eckert wrote: You have two kernel drivers for USB MIDI devices. * 'snd-usb-audio' is the ALSA module containing the drivers for Audio and MIDI USB devices. * 'usb-midi' is the OSS/Free module for USB MIDI devices only. * 'audio' is the OSS/Free module for USB Audio devices. You can have both modules compiled and installed, but you should only use one of them at a time. ALSA does not need the OSS/Free modules. It can do OSS emulation using it's own resources. Both drivers want to be loaded and claim the device if you have hotplug installed. To "blacklist" one of them, insert a line with the module name in the file /etc/hotplug/blacklist. Something like this: [~]$ cat /etc/hotplug/blacklist # # Listing a module here prevents the hotplug scripts from loading it. # Usually that'd be so that some other driver will bind it instead, # no matter which driver happens to get probed first. Sometimes user # mode tools can also control driver binding. # # Syntax: driver name alone (without any spaces) on a line. Other # lines are ignored. # # uhci ... usb-uhci handles the same pci class usb-uhci # tulip ... de4x5, xircom_tulip_cb, dmfe (...) handle same devices de4x5 # At least 2.4.3 and later xircom_tulip doesn't have that conflict # xircom_tulip_cb dmfe # audio usb-midi stv680 [~]$ Regards, Pedro