So I have something that I am trying to do in kvm that requires a usb to serial converter...that goes to a serial device. I pass the usb to serial device via a physical device and win7 discovers the device and assigns it a com port...all is good until I reboot win7 and I have to remove the device and re-add it from kvm...it then discovers it and assigns it a new com port. If I look in windows it appears that the com port it was originally using shows that it is in use..so I think that is the issue but not sure how to correct it so every time I reboot I dont have to re-add...

my xml snippet... <hostdev mode='subsystem' type='usb' managed='yes' <source> <vendor id='0x067b'/> <product id='0x2303'/> </source> </hostdev>

Any thoughts...would be appreciated...Thanks! :)