No the keys don't produce acpi-events.
Instead they produce scancodes that are not recognized by the userspace (see 
http://people.freedesktop.org/~hughsient/quirk/quirk-keymap-scancodes.html)

There are two possible solutions:
1. add some lines to the file "samsung.hk" of the package "hotkey-setup" but 
this seems to be deprecated 
2. make the scancodes known using "hal" by adding them to hal-fdi-file 
"30-keymap-misc.fdi" which is already done upstream (21hour ago ;-) ) according 
to 
http://gitweb.freedesktop.org/?p=hal-info.git;a=blob;f=fdi/information/10freedesktop/30-keymap-misc.fdi

I think the second one would be the better solution, which might be
integrated automatically with the next hal-info-merge.

-- 
[hardy] several Fn-Keys stop working after loading kernel on Samsung Q45 laptop
https://bugs.launchpad.net/bugs/212790
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