On Fri, Sep 17, 2010 at 10:24:55PM +0200, Ferry Toth wrote: > Well, that may be so. > But again, the driver works fine using native mono or native linux I know because I encountered just such a problem with the cp210x driver under wine. Calls were made to the driver that it couldn't handle properly. It is a known problem under wine. I am not on the machine where I have details, so I can't tell you more just now. All the linux programs that I tried including minicom worked fine. > > Is there any windows terminal software that is known to run under wine, > using the motherboard UART (ttyS0) that I could use to test the usb > serial port? Pass. The days when I knew about M$ software are long past, I am delighted to say. IIRC something like minicom exists, indeed must exist, in M$ world: "terminal" maybe? Someone else will have to answer that. ael