On Mon, 2014-05-26 at 13:17 +0200, Martin Rudhart wrote: > Thank your for your reply, > > A summary of my Bugreport at Launchpad: > My usb-Webcam Logitech c920 doesn't work when connected to my usb 3.0 > Host Controller (Etron EJ168a). When connected to a usb 2.0 Host > Controller it works perfectly. When I connect my usb 3.0 stick to the > same port, it's recognized and also works - just not the Webcam. > Disabling usb 3.0 Legacy Mode (xhci) in my Bios doesn't change anything, > It's still used instead of ehci. > > Ubuntu 14.04 x64 > 3.13.0-24-generic > Mainboard: Asrock Z68 Pro3 Gen3 > Bios: P2.30 (latest) > > Here's what dmesg shows if I un/replug the webcam with the > mainline/upstream kernel (3.15.0-031500rc6-generic amd64): > > dmesg | grep xhci > [ 165.165101] usb 3-1: new high-speed USB device number 3 using xhci_hcd > [ 166.411905] xhci_hcd 0000:06:00.0: ERROR: unexpected command > completion code 0x11. (multiple instances) Parameter error. Please switch on xhci dynamic debugging. But whatever you do, never ever mutilate a bug report like this. Never ever grep around and drop parts of the report. And don't put things on an external server one cannot access with all tools. Regards Oliver -- 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
