[Bug 49974] New: termite-3.4 can't connect to com5 -> /dev/ttyACM0

[WineHQ Bugzilla]

https://bugs.winehq.org/show_bug.cgi?id=49974

            Bug ID: 49974
           Summary: termite-3.4 can't connect to com5 -> /dev/ttyACM0
           Product: Wine
           Version: 5.18
          Hardware: x86-64
               URL: https://www.compuphase.com/software_termite.htm
                OS: Linux
            Status: UNCONFIRMED
          Severity: normal
          Priority: P2
         Component: -unknown
          Assignee: wine-bugs at winehq.org
          Reporter: cedric.dewijs at eclipso.eu
      Distribution: ArchLinux

Created attachment 68375
  --> https://bugs.winehq.org/attachment.cgi?id=68375
console messages

Summary
termite-3.4 can't connect to com5 -> /dev/ttyACM0

Prepare wine:
$ rm -rf ~/.wine/
$ wineserver -k
$ wineboot

Download location
https://www.compuphase.com/software_termite.htm
https://www.compuphase.com/software/termite-3.4.exe
$ sha256sum termite-3.4.exe 
ca440b6c7f6eaa812ba5f8bf42aed86e02022ca50a1c72585168c9b671d0fe19 
termite-3.4.exe

Steps to reproduce:
1) Install the program:
$ wine termite-3.4.exe 
Accept the defaults.
Now termite starts.

2) Press settings.
The dropdown box only shows COM1. Choose baud rate 9600 and press OK. 
Now termite reports "Failed to initialize the port. Please verify the COM port
settings."
3) Press "Connect". 
Now that termite reports "Waiting for port"
4) Press close.
Now termite closes.

As a sanity test, I open moserial, choose /dev/ttyACM0 9600,8N1, press connect,
and I see the messages my MCP2221 serial to USB converter is sending to me.

/dev/ttyACM0 is detected by wine:
$ ls -l ~/.wine/dosdevices/
total 0
lrwxrwxrwx 1 cedric cedric 10 Oct 10 19:25 c: -> ../drive_c
lrwxrwxrwx 1 cedric cedric 10 Oct 10 19:35 com1 -> /dev/ttyS0
lrwxrwxrwx 1 cedric cedric 12 Oct 10 19:35 com5 -> /dev/ttyACM0
lrwxrwxrwx 1 cedric cedric  8 Oct 10 19:26 d:: -> /dev/sr0
lrwxrwxrwx 1 cedric cedric  1 Oct 10 19:25 z: -> /

My versions
$ wine --version
wine-5.18 (Staging)
$ pacman -Q wine
wine-staging 5.18-1
 uname -a
Linux cedric-p4 5.8.14-arch1-1 #1 SMP PREEMPT Wed, 07 Oct 2020 23:59:46 +0000
x86_64 GNU/Linux

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