[Bug 58142] Teraterm 5.4.0 / Serial communication not functional

[WineHQ Bugzilla]

http://bugs.winehq.org/show_bug.cgi?id=58142

--- Comment #3 from Janne  ---
It seems to be possible to reproduce issue with virtual serial port.

I created two virtual ports with command:

socat -d -d pty,raw,echo=0 pty,raw,echo=0

I added COM3 as dev/pts/2 to wine registry.
Opened com3 with teraterm and used script to write to port /dev/pts/1 with 1
second interval.

While script is running GUI is somewhat sluggish and data is seen on terminal
with 1-3s intervals.

Script that was used is attached to bug-58594