Hi! As a technician, I need often to use some form of serial port communication. My recent experience is with a program for programming TYT radios from China. They supply a simple windows app, which allows to program all the features of the radio, which cannot be accomplished using the radio keyboard only. The program works perfectly in wine, with one exception - a physical comms with the radio. It complains that it doesn't receive a response from the radio, while the radio crashes - it stops working, when a programming attempt is made, and has to be power-cycled. The radio is connected using a USB cable, which contains just a regular PL-2303 USB to serial converter, which is perfectly supported in Linux. Port assignment for wine is also done, proof of which is, that the radio crashes upon the programming request. The data volume to be programmed is small, just a few hundreds of bytes. It's really stupid that I can prepare my data in the program only, and then I need to ask my colleague with real windows to perform a programming job :-(. The program can be freely downloaded from the TYT pages: http://www.tyt888.com/WebEditor/UploadFile/201096144939483.rar but a real radio is needed to debug the comms problem. I've captured the console output with WINEDEBUG=+comm, which is attached. It contains a log of three consecutive attempts to program the radio. I'm ready to do more debugging, but I don't know, how to proceed now. With regards, Pavel.