Hi Sarah, My ARM board has an xHCI controller on it. I have installed linux-2.6.35.12 on it. If i connect usb 2.0 device to ehci controller port or xhci port (xhci driver already loaded), it works fine. But when my usb 2.0 device is already attached and i do insmod xhci driver, i got the following error as below xhci-hcd: Timeout while waiting for a slot hub 5-0:1.0: couldn't allocate port 1 usb_device And device does not get enumerated after this error. Please help me for this issue. Thanks & Regards, Aman -- 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