[linux-audio-dev] Re: [linux-audio-user] problems with Midisport 2x2

[Clemens Ladisch]

Ivica Bukvic wrote:
> I've got a small problem with my Midisport 2x2 MIDI interface. While it worked
> ok before, now for some odd reason I cannot get it to open for MIDI output
> (from the computer). I've checked the /var/log/messages and this is what I
> got:
> [...]
> It says that the device was opened with 4 input and 0 output ports. Why is
> this the case?

It's a bug in ALSA 0.9.0rc7. You could get the current CVS version, or
apply the following patch:

Index: usbmidi.c
===================================================================
RCS file: /cvsroot/alsa/alsa-kernel/usb/usbmidi.c,v
retrieving revision 1.18
retrieving revision 1.19
diff -u -r1.18 -r1.19
--- usbmidi.c	13 Jan 2003 09:50:26 -0000	1.18
+++ usbmidi.c	3 Feb 2003 09:58:14 -0000	1.19
@@ -821,7 +821,7 @@
 		    ms_ep->bDescriptorType != USB_DT_CS_ENDPOINT ||
 		    ms_ep->bDescriptorSubtype != MS_GENERAL)
 			continue;
-		if ((ep->bEndpointAddress & USB_ENDPOINT_NUMBER_MASK) == USB_DIR_OUT) {
+		if ((ep->bEndpointAddress & USB_ENDPOINT_DIR_MASK) == USB_DIR_OUT) {
 			if (endpoints[epidx].out_ep) {
 				if (++epidx >= MIDI_MAX_ENDPOINTS) {
 					printk(KERN_WARNING "snd-usb-midi: too many endpoints\n");


HTH
Clemens