After stopping hal and acpid (/etc/init.d/acpid stop; /etc/init.d/hal stop) I can adjust brightness in console and kde with all levels, but there is no popups in kde (guidance uses hal?). So it looks like that there are two services that handling brightness changing (hal+kdeish_tools[kmilo+kde-guidance] and something else).
After stopping hal and acpid (/etc/init.d/acpid stop; /etc/init.d/hal stop) I can adjust brightness in console and kde with all levels, but there is no popups in kde (guidance uses hal?). So it looks like that there are two services that handling brightness changing (hal+kdeish_ tools[kmilo+ kde-guidance] and something else).