http://bugs.winehq.org/show_bug.cgi?id=31563
--- Comment #6 from matteli matthieu.nue@gmail.com 2012-09-02 03:02:19 CDT --- I use relay option debug puts some sleep function between function and find it's a write function that cause the freeze of the device.
For the get_hand_flow problem, peharps the ioctl (TIOCMGET) is not implented in the driver i use for the device ? I use the Generic Serial driver of the usb serial driver (perhaps the PL2303 driver works better but i don't now how used it).