[Bug 49752] Mikster MPC4 System: 'Selected serial port not exist'

[WineHQ Bugzilla]

https://bugs.winehq.org/show_bug.cgi?id=49752

--- Comment #12 from [e-mail] ---
Well, I have tried this patch:

diff -Naru wine-6.0-rc6.orig/dlls/ntdll/unix/serial.c
wine-6.0-rc6/dlls/ntdll/unix/serial.c
--- wine-6.0-rc6.orig/dlls/ntdll/unix/serial.c    2021-01-08 23:03:21.000000000
+0100
+++ wine-6.0-rc6/dlls/ntdll/unix/serial.c    2021-01-12 03:55:14.352020992
+0100
@@ -598,9 +598,9 @@
 {
     struct termios port;

-    if ((shf->FlowReplace & (SERIAL_RTS_CONTROL | SERIAL_RTS_HANDSHAKE)) ==
-        (SERIAL_RTS_CONTROL | SERIAL_RTS_HANDSHAKE))
-        return STATUS_NOT_SUPPORTED;
+//    if ((shf->FlowReplace & (SERIAL_RTS_CONTROL | SERIAL_RTS_HANDSHAKE)) ==
+//        (SERIAL_RTS_CONTROL | SERIAL_RTS_HANDSHAKE))
+//        return STATUS_NOT_SUPPORTED;

if (tcgetattr(fd, &port) == -1)
     {

Now the program shows 'Device not responding' instead of 'Selected serial port
not exist', even when a device is connected.