On Mon, Jul 29, 2013 at 4:25 PM, Alan Stern <stern@xxxxxxxxxxxxxxxxxxx> wrote: > On Sun, 28 Jul 2013, James Stone wrote: > >> On Sat, Jul 27, 2013 at 6:45 PM, Alan Stern <stern@xxxxxxxxxxxxxxxxxxx> wrote: >> > On Sat, 27 Jul 2013, James Stone wrote: >> > >> >> OK. So this seems to have solved the starting jack at low latencies >> >> problem, but I am still getting sporadic cannot submit urb (err = -18) >> >> under normal use. Will try to add some more info to the #1191603 >> >> report if I can get it to happen while logging IRQ. >> > >> > Do these errors occur at the start of a session or somewhere in the >> > middle? >> > >> > If they occur in the middle, they indicate possible underruns. The >> > patch below will greatly reduce the number of these errors (probably to >> > the point where you don't see any at all), although it won't fix >> > possible underruns. >> > >> >> OK - this patch didn't help - still seeing these cannot submit urb >> (err = -18) errors coming up at random times (this time while the >> computer was idling). > > Do you think you can get a usbmon trace showing one of those errors? > Or would the trace file end up being hopelessly large? > No - no way to get usbmon trace on this - it happens only every few hours at unpredictable times, and I can't work out what triggers it. J -- 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
