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 -- Dieter Spaar, Germany spaar@mirider.augusta.de