https://bugs.winehq.org/show_bug.cgi?id=29188
--- Comment #8 from Roger rogerx.oss@gmail.com --- I should also note with this usbserial adapter, this MCT serial adapter has blinking red & green lights denoting RX/TX.
If I'm not mistaken, I get four series of green (LINK) and red (RX) lights in what looks like an attempt to communicate with the DB9/COM linked device. Green is always lit until the red TX/RX lights light, so I see a green light, then a red RX light and then green link light blink. This occurs four times, until the above noted error occurs, and likely a timeout error. (The COM/DB9 device is probably being probed with an incorrect request. Wine might be only configured to communicate with other computers running a full terminal, already transmitting data?)
The lights being green (LINK), red (TX), red (RX). I don't think I see the TX light lighting up, as this might be the light for when the DB9/COM connected device transfers data downward. I'm guessing, WINE is yet to be configured to deal with common RX/TX requests as noted above.
The only other DB9/COM device I have is a GPS hockey puck antenna, for which I do not currently have a desktop 12VDC power supply yet and I know this device constantly outputs GPS data not likely requiring any request packet to initiate the data from being sent out. I do have another computer to run a terminal (ie. mintty), but hasn't been setup configured in this method for quite sometime.