Re: Proposed response to gnopernicus/DecTalk problem

[Bill Haneman <Bill Haneman Sun COM>]

Thanks Dave.

How does brltty ensure that the byte sequence it sends to the probed tty 
ports is nontoxic to 'unknown' devices?  In theory this would seem 
impossible.

- Bill

Dave Mielke wrote:

> [quoted lines by Bill Haneman on 2005/02/15 at 12:17 +0000]
>
>  
>
> > This would mean that Gnopernicus' default braille settings would specify 
> > neither serial port nor braille driver (unless, possibly, we used the 
> > BrlTTY driver as our default). 
> >    
>
> I'd recommend using BRLTTY for the default. It's harmless to use it if BRLTTY
> isn't running, and, if it is running, braille will be automatically activated
> on the right port and for the right kind of display. This would be very useful
> for those who are deaf-blind as well as for those who only use braille. It'd
> also cover those who don't have a soundcard and/or speakers, those who do have
> such things but which are in use by other applications, etc.
>
>  
>
> > The theoretical issue of USB port renumbering for braille-and-speech 
> > users is one we will need to explore further - we don't know that this 
> > can happen with USB serial devices, 
> >    
>
> Yes we do, and it does. When you connect a USB to serial adapter, you never
> know which ttyUSBn device you're going to get. When you then
> disconnect/reconnect it, you could easily get a different one. Because of this,
> BRLTTY has already been designed to be immune from this problem.
>
>