Bug#760916: brltty interferes with getty autostart

[Dave Mielke]

[quoted lines by Dave Mielke on 2015/01/20 at 00:34 -0500]

>Brltty could delay opening the tty until the user needs to inject a character. 
>This could be by typing on the braille device, by requesting cursor routing, 
>etc. The user probably wouldn't do any of that until the login prompt appears.

I just checked. It turns out that brltty actually does need to open the vt 
right away. For example, it uses GIO_UNIMAP to retrieve the Unicode map so that 
it can back translate font positions into characters in order to determine 
what's on the screen. It also uses VT_GETHIFONTMAKS in order to know how to 
interpret the attributes bytes. Yet another thing it does is use VT_GETSTATE in 
order to determine which vt is active (vt_stat.v_active). Even open on demand, 
therefore, would result in the tty being opened almost immediately.

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