Closing as accessibility support has been removed.

Artur,

Thank you for reporting this. Unfortunately no one of the developers has access 
to braille hardware.
If you could test the 2011.05-rc1 release candidate and check if the problems 
are gone or still present, this would be appreciated.

Download: http://testwww.grml.org/download/prerelease/

Thanks,
Chris

Welcome.
My name is Artur Rutkowski and I want to report the bug. Today I burned the newest grml distro on cd and when the bootprompt appeard I wanted to boot grml with brltty=hm. These to letters means, that braille display is one of hims' product. Unfortunately the braille display didn't react. The braille display wasconnected to usb. When booting finished I tried to run brltty manually from the zsh. Unfortunately no results. Later I tried to boot grml with brltty with different parameters: with braille display, port and text table or in other ways. I'm not sure does this problem occurs at the brltty's side or it is problem at the grml's side on detecting usb.
If it is possible to check it please check this problem and answer my e-mail as soon as possible.
Greetings.
Artur Rutkowski