Enclosed you find two pictures of my keyboard that show the hotkeys/FN-
keys. I can use some of the hotkeys (volume up, down, mute and
brightness) as long as I don't add the parameter acpi=off. Nevertheless
in that case the power management is not available (as described above).

I am sorry, I couldn't get the keycode for some of the buttons.

Access IBM is 0x9f
volume down is 0xae
volume up is 0xb0
mute is 0xa0

FN-Key functions (as described on www.ibm.com)

FN+F3: Turn off the LCD display, leaving the screen blank. To turn the
LCD display on again, press any key or the TrackPoint pointing stick.

FN+F4: Put the computer in standby mode. To return to normal operation,
press the Fn key independently, without pressing a function key.

FN+F5: No function as far as I know

FN+F7: Switching the display output location.
Switch between the computer display and an external monitor. If an external 
monitor is attached, the computer output is displayed in the following three 
patterns by turns:

    * External monitor (CRT display)
    * Computer display and external monitor (LCD + CRT display)
    * Computer display (LCD)

FN+F12: Put the computer into hibernation mode. To return to normal
operation, press the power button for less than four seconds.

FN+Pos1: Brightness up

FN+Ende: Brightness down

Please let me know if you have any further questions.


** Attachment added: "hotkeys_part1.jpg"
   http://launchpadlibrarian.net/8548456/hotkeys_part1.jpg

-- 
IBM Thinkpad R40e special keys does not work with ACPI
https://bugs.launchpad.net/bugs/53606
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