Bug#760916: brltty interferes with getty autostart

[Dave Mielke]

[quoted lines by Samuel Thibault on 2015/01/22 at 00:46 +0100]

>Reading is fine, since it's done through /dev/vcsa, which doesn't count
>in VT_GETSTATE.

Not exactly. The tty device still needs to be opened in order to do things like 
fetch the Unicode map.

It's possible, of course, that things like the Unicode map, the screen font 
map, the character translation table, etc are common to all vts, in which case 
they could be fetched from tty1. I'm not familiar enough with the internals to 
know for sure.

I noticed a comment in the source for systemd-logind stating that tty1 is 
special, so using it would seem to be okay. We still need to be sure that all 
of what we need for mapping the font positions returned by the vcs devices back 
to the original characters is common to all ttys so that fetching them from 
tty1 would be valid for other ttys.

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