3 Feb
2011
3 Feb
'11
9:21 a.m.
Rods Bobavich wrote:
USB interface is any one of the M-Audio Line.
FastTrack USB, FastTrack Pro,
MobilePre USB... In other words multiple interfaces have been tested. This
problem is specific to this machine...
ALSA urb.c:480: frame 0 active: -75
Thank you for not mentioning this message on alsa-devel.
In the context of USB, the error code -75 means "babble", which is
a technical term from the USB specification that means that the device
sent some data at a time when it shouldn't (or at least the controller
thinks so).
ALSA urb.c:146: timeout: still 7 active urbs..
ALSA urb.c:146: timeout: still 2 active urbs..
ALSA pcm.c:223: 4:2:1: usb_set_interface failed
As a result of that, the USB controller driver gets wedged.
This looks like a hardware problem with your USB controller. Please try
the latest kernel; there were added some workarounds recently.
You might also try connecting the device through a hub (but there are
some bugs in the EHCI driver which might make it think that it cannot
schedule enough bandwidth for full duplex).
CE: hpet increased min_delta_ns to 7500 nsec
It seems that the error happened about the time of the hpet increase. Do we
have a timer problem?
No, this has nothing to do with USB. This message typically occurs on
AMD system with C1E enabled, and is harmless.
Regards,
Clemens
--
Don't anthropomorphize computers; they don't like it.