serial ttys broken?

Robert Watson rwatson at FreeBSD.org
Wed Sep 21 03:25:51 PDT 2005


On Wed, 21 Sep 2005, Bernd Walter wrote:

>> FreeBSD/i386 (buffy.york.ac.uk) (ttyd0)
>>
>> login: CCeeBSD/i386 (buffy.york.ac.uk) (ttyd0)
>>
>> login:
>>
>> Yes.
>>
>> And that's with ttyd0, not cuaa0, and a Windows machine at the far end 
>> of a 9600 baud link.  A configuration which I'm pretty sure should 
>> perform better.  No matter how hard I try, I can't manage to reproduce 
>> the corruption once logged in, unless I explicitly run 
>> /usr/libexec/getty from the shell, in which case the corruption is even 
>> worse:

FWIW, I've been seeing this problem for ages, but have always considered 
it entertaining as something of a Stargate fan.  I typically see just one 
character corruption in the common case:

CreeBSD/i386 (whatever.whomever) (ttyd0)
login:

However, my theory has been that we have a problem when we reset serial 
ports on last close.  I.e., just before getty is respawned and launches 
login.

Cree,

Robert N M Watson


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