On Fri, 27 Mar 2015, Peter Chen wrote: > Hi Alan, > > I tried to your case today, but it seems full speed hub with siTD > has some problems with latest greg's next tree, I use UAC2 with > configfs for audio device, high speed hub works ok. > > The commands: > aplay -D hw:1,0 audio32k16M.wav > arecord -Dhw:1 -r 32000 -c 1 -f S16_LE -d 20 file_32.wav > > The corresponding failure logs: > [ 81.542848] ci_hdrc ci_hdrc.0: iso sched full bd7d5100 > [ 81.542884] usb 1-1.2: cannot submit urb 0, error -28: not enough > bandwidth > [ 355.078938] ci_hdrc ci_hdrc.0: iso sched full bd49cc00 > [ 355.078969] usb 1-1.2: cannot submit urb 0, error -28: not enough > bandwidth That's strange. Can you please post the /sys/kernel/debug/usb/devices file (with the UAC2 gadget plugged in), and also collect a usbmon trace of the test? Thanks, Alan Stern -- To unsubscribe from this list: send the line "unsubscribe linux-usb" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
