Hello Peter,

On Tue, 8 May 2012 23:47:33 +0200, "Peter Stuge" peter@stuge.se wrote:

Yes, I haven't seen it available in any userspace API on any system. :\

It may be possible to send the request to the hub from userspace, but I haven't tried it.

Older Windows Version (before Vista) had IOCTL_USB_HUB_CYCLE_PORT to perform a power cycle. I think there is still a way in newer version too, If I am not wrong the WHQL driver testings tools do perform USB power cycles frequently when testing USB devices.

Of course the above is only relevant if you care about Windows ;-)

Best regards, Dieter