[Bug 29188] Serial Port Comm Failure for USB2Serial Converters?

https://bugs.winehq.org/show_bug.cgi?id=29188

--- Comment #10 from Roger  ---
Grepping some of the debug output, I think the following is very likely
relevant here!

trace:comm:get_irq_info TIOCSERGETLSR err Inappropriate ioctl for device
trace:comm:get_modem_status 0146 -> MS_RLSD_ON MS_DSR_ON

The above TIOCSERGETLSR was previously also reported, and likely suspected as
the root cause.

For those referencing this bug, please see
"http://wine-wiki.org/index.php/Debugging_Wine_Examples#Com_Ports"  The above
error was easily found using 'WINEDEBUG="+comm,+file" wine my.exe', and doesn't
look like Wine was able to even open a COM port because of the TIOCSERGETLSR
error.