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. _______________________________________________ Linux-audio-dev mailing list Linux-audio-dev@lists.linuxaudio.org http://lists.linuxaudio.org/listinfo/linux-audio-dev
