tcsetattr failed: invalid argument

Gert Doering (gert@greenie.muc.de)
Fri, 10 Jul 1998 00:28:29 +0200


Hi,

Christoph Kukulies wrote:
> 07/09 19:16:01 aa0  autobauding: switch to 14400 bps
> 07/09 19:16:01 aa0  tcsetattr failed: Invalid argument

I think the manual says something like "don't use -a unless you know
what you're doing and why you need this".

You don't know what you are doing -> switch off "-a" / set "autobauding no".

Explanation for the error message: 14400 is not a valid port speed on PC 
uarts.  

History: Autobauding is only needed for very old modems that require the 
same serial port speed as the line speed, and those usually only do 
1200/2400, maybe 9600, but no faster speeds.  With v32bis and faster 
modems, the whole concept doesn't make sense anyway, because of the 
capabilities for fallback/fallforward during an existing connection.

gert
-- 
Gert Doering
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