bugGNU Screen - Bugs: bug #63750, screen sets baud rate to 9600 when...


bug #63750: screen sets baud rate to 9600 when instructed to set 460800

Submitter:  Martin Häcker <dwt>
Submitted:  Fri 03 Feb 2023 09:45:07 AM UTC
Category:  None Severity:  3 - Normal
Priority:  * 5 - Normal Status:  None
Privacy:  Public Assigned to:  None
Open/Closed:  Open Release:  4.0.3
Fixed Release:  None Planned Release:  None
Work Required:  None
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Tue 04 Jul 2023 01:38:39 PM UTC, comment #1: 

Hey Martin,

thanks for reporting that.
Are you sure you use screen 4.0.3? This version was released 15 years ago.

Unfortunately, I don't have Mac OS and I can't test it there, but on BSD systems it works well for me (have no problem with baud rate on OpenBSD and support for 460800 (last stable version) is there).

I think it will be better to ask Mac OS community/support for some solution/fix. Otherwise, I can provide a patch of course, but for this I need to reproduce it first.

Alexander Naumov <anaumov>
Group administrator
Fri 03 Feb 2023 09:45:07 AM UTC, original submission:  

It seems that screen on Mac OS 13.2 (22D49) is not able to set high baud rates when communicating with serial devices.

For example, this command:

screen /dev/tty.usbserial-210319B580D41 460800

Actually initialized the Serial Device to 9600 baud without showing any error message. (This is the standard screen that apple provides).

Is this a known problem? Is there a fix available? Is there a way to get apple to update the included version of screen?

Thanks in advance!

Martin Häcker <dwt>


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