Hello, Sorry for the misunderstanding (maybe my english could be better): I've tried on another port and another computer and I had exactly the same problem. I will try on a third computer this evening, but if the problem is still the same, surely the problem couldn't be on the USB controller (otherwise it would be really surprising that I would be the first to note this kind of problem which occur on every kind of USB controller).
Something that I haven't tried is another linux distro: I've always tried on Debian. Maybe I should give a shot to Suse or RedHat. Thanks anyway ! 2009/6/29 Brian Pin <[email protected]>: > Hi, > Based on the link you provided > (http://forums.quickcamteam.net/showthread.php?tid=860), There are obviously > a lot of frame drops (USB isochronous frame lost (-71).) "-71" means > -EPROTO, which will be dropped by the driver: > : > for (i = 0; i < urb->number_of_packets; ++i) { > if (urb->iso_frame_desc[i].status < 0) { > uvc_trace(UVC_TRACE_FRAME, "USB isochronous frame lost (%d).\n", > urb->iso_frame_desc[i].status); > continue; > } > : > The "-EPROTO" status of each isoc packet is set by the host controller > driver when there are some error happens and halts the controller. You also > verified on the other machines the situation is not happening, so maybe you > can try some different port of your Linux machine, or find a different Linux > machine to test it. All in all the reason probabbly is not related to the > device or the application. It is just the host controller you use. Maybe try > to post some questions on Linux-USB mailing list helps. > -- > Best Regards > Brian > _______________________________________________ Linux-uvc-devel mailing list [email protected] https://lists.berlios.de/mailman/listinfo/linux-uvc-devel
