Bus 001 Device 002: ID 8087:8000 Intel Corp.
Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
Bus 003 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub
Bus 002 Device 001: ID 1d6b:0002 Linux FOundation 2.0 root hub

Bus 003 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub
Couldn't open device, some information will be missing
[...]
Bus 002 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
Couldn't open device, some information will be missing

WARNING: CPU: 3 PID: 0 at /build/buildd/linux-3.13.0/drivers/usb/host/xhci-ring.c:1579 handle_cmd_completion+0xe5a/0xe70()

[...] Computer kernel: [...] xhci_hcd 0000:00:14.0 Timeout while waiting for [address device command/a slot].
[...] Computer kernal: [...] xhci_hcd 0000:00:14.0 Abort the command ring, but the xHCI is dead.