On Tue, 25 Jun 2013, Oliver Neukum wrote: > On Tuesday 25 June 2013 10:29:06 Alan Stern wrote: > > On Tue, 25 Jun 2013, Oliver Neukum wrote: > > > > > Hi Sarah, > > > > > > I am seeing a few webcams that work only on EHCI. The XHCI is in principle > > > functional. Other webcams do work. Do you have any idea what to do in such > > > a case? The cameras are high-speed devices. The camera is detected, but yields no pictures. > > > I do have traces but they are rather large. > > > > > > Regards > > > Oliver > > > > > > (trace of device detection - the open won't go over the list) > > > > Did you compare an EHCI usbmon trace with the xHCI trace? > > Yes, there are no errors on the USB level. Don't look for errors; look for differences. If everything was working properly, the two traces would be the same except for small changes in timing, device addresses, and so on. 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
