On Friday 03 July 2009, Pierre Ossman wrote: > Is there any way I can force > the bus to power down and up again to simulate removal and reinsertion? As Alan noted -- not really. Maybe hook it up to an external hub; most of those seem to claim they support power switching. I did once have a system with an OHCI root hub which supported power switching. Which was handy because one UPS needed to start its enumeration from link-power-off, not unlike what you are observing. That system made a good regression test for the feature in the Linux-USB stack whereby it tried to force root hub enumeration to start from power-off. Since that system died a while back (sigh), I no longer know if that still works on those fortunate systems which *do* support such switching. - Dave -- 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