It looks you hit the bug, CR6764573. So far we have not fixed it in software. Once we make some great progress, we will let you know.
Regards, Strony Mika Borner : > Strony Zhang wrote: >> The issue is probably not close related with which type of USB >> device. The root cause is most likely in USB host controller driver >> (usb/ehci)or other kernel model (iommu). Now we are disussing the >> issue with Intel guys. >> What is your system? Nehalem? Could the workaround in the CR6764573 >> be used on your system? >> > > I have a Nehalem system. Disabling Intel VT-d in BIOS did solve the > problem. > > Thanks > Mika
