On Fri, Dec 02, 2011 at 04:18:11PM +0000, KrishnaMohan Bandi wrote: > I have attached the dmesg from when the camera is first plugged in and > also the complete 'lspci -vvv' and 'lsusb -v' output in other > attachments. > > Using IDS ueye camera .... > > [16809.701217] usb 9-3: USB disconnect, address 2 > [16811.552121] usb 9-3: new high speed USB device using xhci_hcd and address 0 > [16811.570947] usb 9-3: configuration #1 chosen from 1 choice > [16840.646204] xhci_hcd 0000:08:00.0: WARN: Stalled endpoint > [17145.555235] xhci_hcd 0000:08:00.0: ERROR no room on ep ring > [17145.555250] usb 9-3: usbfs: usb_submit_urb returned -12 > [17212.760318] xhci_hcd 0000:08:00.0: ERROR no room on ep ring > [17212.760330] usb 9-3: usbfs: usb_submit_urb returned -12 > > Using PointGrey Firefly MV camera > > [17484.292165] usb 9-3: new high speed USB device using xhci_hcd and address 0 > [17484.316807] xhci_hcd 0000:08:00.0: WARN: short transfer on control ep > [17484.319798] xhci_hcd 0000:08:00.0: WARN: short transfer on control ep > [17484.322779] xhci_hcd 0000:08:00.0: WARN: short transfer on control ep > [17484.325779] xhci_hcd 0000:08:00.0: WARN: short transfer on control ep > [17484.326435] usb 9-3: configuration #1 chosen from 1 choice > [17503.849677] xhci_hcd 0000:08:00.0: ERROR no room on ep ring Ok, yeah, you need dynamic ring expansion for your cameras. 2.6.36 uses 8 ring segments, and you're runnning 2.6.38, so I guess your cameras need more than 8 segments. Andiry has been working on a patchset for ring expansion, but I have not seen an update in a couple weeks. Andiry, how is the ring expansion code progressing? Sarah Sharp -- 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
