I need debugging Orca eoutput when Unity greeter start the screen reader. It is possible?

[Hammer Attila]

Hy,

Because my machine random time Orca launching and exiting in Unity 
Greeter, I very would like making a debug.out file to correct 
determining what happening this situation in Orca level before I report 
a bug with proper place, Launchpad or upstream.
When this problem is happening, this situation Orca only read following 
messages:
"Welcome to Orca.
Good bye."

After this, if I press two time the CTRL+S keystroke, Orca launch 
correctly, and the login screen are usable, except the user list default 
selected item is not focused.
Unfortunately in /var/crash directory not have any crash file to send 
automaticaly a report with apport-cli or ubuntu-bug commands.

How can possible change running Unity Greeter Orca command to pass the 
--debug-file=anydebugfile.out parameter? Technical this is possible?

Prewious, with oldest GNOME releases possible change Orca launch command 
with gconftool-2 -s -t string /desktop/gnome/applications/at/visual/exec 
'orca' command.

Attila