fix confirmed
uname -rm
3.15.5-1.g01d2774-desktop x86_64
journalctl -b | grep kernel | egrep -i "xhci|trace"
Jul 11 08:09:16 localhost kernel: ftrace: allocating 24222
entries in 95 pages
Jul 11 08:09:17 localhost kernel: xhci_hcd 0000:02:00.0: xHCI
Host Controller
Jul 11 08:09:17 localhost kernel: xhci_hcd 0000:02:00.0: new
USB bus registered, assigned bus number 3
Jul 11 08:09:17 localhost kernel: xhci_hcd 0000:02:00.0: irq 46
for MSI/MSI-X
Jul 11 08:09:17 localhost kernel: usb usb3: Product: xHCI Host
Controller
Jul 11 08:09:17 localhost kernel: usb usb3: Manufacturer: Linux
3.15.5-1.g01d2774-desktop xhci_hcd
Jul 11 08:09:17 localhost kernel: xhci_hcd 0000:02:00.0: xHCI
Host Controller
Jul 11 08:09:17 localhost kernel: xhci_hcd 0000:02:00.0: new
USB bus registered, assigned bus number 4
Jul 11 08:09:17 localhost kernel: usb usb4: Product: xHCI Host
Controller
Jul 11 08:09:17 localhost kernel: usb usb4: Manufacturer: Linux
3.15.5-1.g01d2774-desktop xhci_hcd
Jul 11 08:09:18 localhost kernel: usb 3-1: new high-speed USB
device number 2 using xhci_hcd
Jul 11 08:09:18 localhost kernel: usb 3-1.3: new high-speed USB
device number 3 using xhci_hcd
Jul 11 08:09:18 localhost kernel: usb 4-1: new SuperSpeed USB
device number 2 using xhci_hcd
thanks!
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