Martin Gagnon wrote: > If only the OS can tell the USB controller to generate that Reset > event, then this leads me to my next logical suspect, which are the IN > transactions that suddenly stop. > > Why would they stop happening? Would it make sense to assume that it > is also the host controller driver in the OS that stops these IN > transactions before sending the Reset event isochronous OUT endpoint? The reset has no destination address; it's a special state of the USB signal lines and affects all devices on that bus. The OS will (try to) stop all scheduled transactions before resetting. > Meaning that a problem happened prior to the IN transactions stopped? Yes. Unfortunately, there is no indication why the OS/driver decided to reset. Does this happen with other OSes? Best regards, Clemens ****************** WDMAUDIODEV addresses: Post message: mailto:wdmaudiodev@xxxxxxxxxxxxx Subscribe: mailto:wdmaudiodev-request@xxxxxxxxxxxxx?subject=subscribe Unsubscribe: mailto:wdmaudiodev-request@xxxxxxxxxxxxx?subject=unsubscribe Moderator: mailto:wdmaudiodev-moderators@xxxxxxxxxxxxx URL to WDMAUDIODEV page: http://www.wdmaudiodev.com/