[BRLTTY] Clickable links, virtual consoles etc. (Was Re: Footsteps towards better accessibility in Linux)

[Sébastien Hinderer]

Dave Mielke (2025/05/09 12:48 -0400):
> [quoted lines by Sébastien Hinderer on 2025/05/09 at 17:59 +0200]
> 
> >At least on Debian, there is a file called /etc/default/console-setup in
> >wchich you can define two shell variables, SCREEN_WIDTH and
> >#SCREEN_HEIGHT. I meant I left these two undefined and that's how I
> >obtained the 135 lines by 480 columns, this second number actually
> >making not much sense if I understood you correctly.
> 
> Actually, it does. Note that your default of 480x135 is essentially double the defualt of 240x67 that I adopted some years ago. I guess that's the width:height ratio that looks good for sighted people.
> 
> Note that there's nothing wrong with a width or height that exceeds
> 255 within the kernel. It's just a limitation imposed on the interface
> to the kernel (the vcs devices) that brltty uses.

Ah yes thank you, your explanaitons make complete sense to me. So such a
big screen actually works for sighted persons, jsut not for us because
of the limitaitons of the vcsa interface.

I am a bit surprised that the vcsa interface was not designed to
represent screens that actually can be displayed, but I guess it's jsut
that the two date from different times.

If we wanted to change the vcsa, I assume that would create backward
compatibility issues and it would thus be better to introduce a new
interface?

Seb.