Hi Jan, Could you try the attached patch and different settings of kern.hz? --HPS -------------- next part -------------- A non-text attachment was scrubbed... Name: xhci_timing.patch Type: text/x-patch Size: 1945 bytes Desc: not available Url : http://lists.freebsd.org/pipermail/freebsd-usb/attachments/20111117/04a80749/xhci_timing.bin