[PATCH v3 0/1] MR9968: ntdll: Report all possible serial baud rates.

[Myles Gray (＠magnix)]

This fix is necessary to allow for applications that use GetCommProperties() where the hardware device uses a baud rate \>115200. Without, these devices and applications are non-functional.

Wine-Bug: https://bugs.winehq.org/show_bug.cgi?id=59290

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  v3: ntdll: Report all possible serial baud rates.
 
https://gitlab.winehq.org/wine/wine/-/merge_requests/9968

[PATCH v3 1/1] ntdll: Report all possible serial baud rates.

[Myles Gray]

From: Myles Gray <[e-mail]>

This fix is necessary to allow for applications that use
GetCommProperties() where the hardware device uses a baud
rate >115200. Without, these devices and applications
are non-functional.

Wine-Bug: https://bugs.winehq.org/show_bug.cgi?id=59290
---
 dlls/ntdll/unix/serial.c | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/dlls/ntdll/unix/serial.c b/dlls/ntdll/unix/serial.c
index 7a79dd0ac6a..094331ff110 100644
--- a/dlls/ntdll/unix/serial.c
+++ b/dlls/ntdll/unix/serial.c
@@ -376,14 +376,15 @@ static NTSTATUS get_properties(int fd, SERIAL_COMMPROP *prop)
     prop->ServiceMask       = SP_SERIALCOMM;
     prop->MaxTxQueue        = 4096;
     prop->MaxRxQueue        = 4096;
-    prop->MaxBaud           = BAUD_115200;
+    prop->MaxBaud           = BAUD_USER;
     prop->ProvSubType       = PST_RS232;
     prop->ProvCapabilities  = PCF_DTRDSR | PCF_PARITY_CHECK | PCF_RTSCTS | PCF_TOTALTIMEOUTS | PCF_INTTIMEOUTS;
     prop->SettableParams    = SP_BAUD | SP_DATABITS | SP_HANDSHAKING |
                               SP_PARITY | SP_PARITY_CHECK | SP_STOPBITS ;
     prop->SettableBaud      = BAUD_075 | BAUD_110 | BAUD_134_5 | BAUD_150 |
                               BAUD_300 | BAUD_600 | BAUD_1200 | BAUD_1800 | BAUD_2400 | BAUD_4800 |
-                              BAUD_9600 | BAUD_19200 | BAUD_38400 | BAUD_57600 | BAUD_115200 ;
+                              BAUD_7200 | BAUD_9600 | BAUD_14400 | BAUD_19200 | BAUD_38400 |
+                              BAUD_56K | BAUD_57600 | BAUD_115200 | BAUD_128K | BAUD_USER ;
     prop->SettableData       = DATABITS_5 | DATABITS_6 | DATABITS_7 | DATABITS_8 ;
     prop->SettableStopParity = STOPBITS_10 | STOPBITS_15 | STOPBITS_20 |
                 PARITY_NONE | PARITY_ODD |PARITY_EVEN | PARITY_MARK | PARITY_SPACE;
-- 
GitLab

https://gitlab.winehq.org/wine/wine/-/merge_requests/9968

[Myles Gray (＠magnix)]

On Thu Jan 29 23:24:02 2026 +0000, Myles Gray wrote:
> changed this line in [version 3 of the diff](/wine/wine/-/merge_requests/9968/diffs?diff_id=241151&start_sha=f6ae4bd023024f07e70cb5825d41cc6685302709#c475275e5048b73b965090c90f652af6434ac5de_386_386)
> All done, thank you so much for the attention @alexhenrie.

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https://gitlab.winehq.org/wine/wine/-/merge_requests/9968#note_128427

[Elizabeth Figura (＠zfigura)]

> The only baud that I am missing is BAUD_128K which I don't think my hardware supports, but it doesn't hurt to include that one too as you proposed.

Is there a way to test hardware support on the Unix side? Should we be doing that?

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https://gitlab.winehq.org/wine/wine/-/merge_requests/9968#note_128429

[PATCH v3 0/1] MR9968: ntdll: Report all possible serial baud rates. - approved

[Alex Henrie (＠alexhenrie)]

This merge request was approved by Alex Henrie.
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https://gitlab.winehq.org/wine/wine/-/merge_requests/9968