What is the output of dmesg? If you get something like:
Sequence Error!(hcd_frame=
Most probably some urb of usb-frame is still missing.
Cause could be too long delays in usb-hcd interrupt handling.
then there are problems with urb and usb.
I managed to use my Us122 with this patch:
diff --git a/sound/usb/usx2y/usbusx2yaudio.c b/sound/usb/usx2y/usbusx2yaudio.c
index b376532..9b672a5 100644
--- a/sound/usb/usx2y/usbusx2yaudio.c
+++ b/sound/usb/usx2y/usbusx2yaudio.c
@@ -324,7 +324,7 @@ static void i_usX2Y_urb_complete(struct urb *urb)
usX2Y_error_urb_status(usX2Y, subs, urb);
return;
}
- if (likely((urb->start_frame & 0xFFFF) == (usX2Y->wait_iso_frame & 0xFFFF)))
+ if (likely((urb->start_frame & 0x03FF) == (usX2Y->wait_iso_frame & 0x03FF)))
subs->completed_urb = urb;
else {
usX2Y_error_sequence(usX2Y, subs, urb);
You should also try to set snd-usb.usx2y paramenter nrpacks to 1.
Ciao
Guido
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