Keys that generate ACPI events

[Marcelo Magno T. Sales]

Hi, people

The Fn keys of my notebook do not generate scancodes, but ACPI events 
instead. I would like to map these events to X keysyms, so that the Fn 
keys are usable in X. How do I do that?
The F8 kernel (2.6.23.1-49.fc8) and acpid get the ACPI events and logs 
messages like the following (F7 kernels and F7 acpid did not):
---------------------------------------------------------------------
Dec  3 18:17:23 home-03 acpid: received event "hotkey ATKD 00000050 
00000000"
Dec  3 18:17:23 home-03 acpid: notifying client 2169[68:68]
Dec  3 18:17:23 home-03 acpid: notifying client 2354[0:0]
Dec  3 18:17:23 home-03 acpid: completed event "hotkey ATKD 00000050 
00000000"
Dec  3 18:17:23 home-03 acpid: received event "hotkey ATKD 00000051 
00000000"
Dec  3 18:17:23 home-03 acpid: notifying client 2169[68:68]
Dec  3 18:17:23 home-03 acpid: notifying client 2354[0:0]
Dec  3 18:17:23 home-03 acpid: completed event "hotkey ATKD 00000051 
00000000"
---------------------------------------------------------------------


Other Fn keys (the ones to control LCD brightness) produce errors like:
---------------------------------------------------------------------
Dec  3 18:17:34 home-03 kernel: ACPI Error (psargs-0355): 
[\_SB_.PCI0.P0P2.VGA_.LCDD] Namespace lookup failure, AE_NOT_FOUND
Dec  3 18:17:34 home-03 kernel: ACPI Error (psparse-0537): Method 
parse/execution failed [\_SB_.PCI0.SBRG.EC0_._Q0E] (Node f7d07f90), 
AE_NOT_FOUND
Dec  3 18:17:35 home-03 kernel: ACPI Error (psargs-0355): 
[\_SB_.PCI0.P0P2.VGA_.LCDD] Namespace lookup failure, AE_NOT_FOUND
Dec  3 18:17:35 home-03 kernel: ACPI Error (psparse-0537): Method 
parse/execution failed [\_SB_.PCI0.SBRG.EC0_._Q0F] (Node f7d07fa8), 
AE_NOT_FOUND
---------------------------------------------------------------------

Is it possible to make these work?

Thanks,

Marcelo