Mario'sBrother wrote:

Function keys ?
are function keys in need of drivers ?
How do they get their juice ?

e.g. Do not work
under F2 is a Lock icon.
under F4 is a Moon icon
etc ...

These work
under Home/End is a screen brightness up/down
under PgDn is a keyboard light.

I remember a long time ago when cleaning up a Dell laptop that I removed
and then had to reinstall a driver package to support the F-keys. The
F-keys will work as their scan codes are standard; however, the
alternate functions are macros so the ancilliary software might be
needed to provide those macro functions (the macro software detects the
scan code when the Fn and F-keys are both in depressed/down/on state).

You sure the functions you mention (which are not the actual F-keys but
alternate functions) don't require you hitting an Fn key along with the
F-key (i.e., Fn+fkey)? Are those alternate actions colored (blue)?
If so, the Fn key is probably also colored blue to clue you into using
it for the alternate (blue) functions on the F-keys.