[BRLTTY] brltty on startup

[Hermann]

Hello Sérgio,
the answer to your first question is easy: It makes no difference.
Since I tried it on my machine, the RUN_BRLTTY optin does not work (but I 
use brltty 3.8dev), I recommend the second option, the linking via 
update-rc.d.
Regarding your second questin, I'm not sure, what's wrong, if anything is 
wrong at all.
Can you open text consoles? What happens when you log into the graphical 
interface? Did you set up Orca to start after log in? 
Hermann