[debian/fso] fsoraw no effect?

[arne anka]

following the wiki i started navit with

fsoraw -r Display,CPU navit

nevertheless, the display went blank after the idle timeout defined in  
frameworkd.conf.
since the fr was connected via usb, it would not suspend, thus i don't  
know if at least requesting the cpu would have worked.

simple questions:
- are there any known issues with fsowraw?
- is the way described in the wiki  
(http://wiki.openmoko.org/wiki/FSO_Resources) outdated?