Although this bug is marked as "fix released" I'm commenting this.
Some Asus and Samsung notebooks share ACPI features like hotkeys and both are 
supported
by the asus_laptop kernel module. This report here added an ACPI hotkey event 
for the Fn+F4
(video switch) combo on my Samsung P35 (ATI Radeon 9700 r300), but there is no 
effect to the key press.
The situation is as follows:

- key press
- /etc/acpi/events/asus-video
- /etc/acpi/videobtn.sh
- acpi_fakekey $KEY_VIDEOOUT
- KEY_VIDEOOUT maps to 227
- no reaction :(

Which application should handle this event in hardy? Where to look for more 
hints?
I've written some helper scripts, I can call manually, which efectively do:
  xrandr --output VGA-0 --auto
  xrandr --output LVDS --mode 1280x1024
  xvattr -a XV_CRTC -v 1
or
  xrandr --output VGA-0 --off
  xrandr --output LVDS --mode 1400x1050
  xvattr -a XV_CRTC -v 0

Why is there no general handler for this case? It's hard to switch video-out 
during run-time and
especially after resume, as there seems to be no automatisation.

[Maybe related report is at bug #212790]

-- 
asus switch video hotkey
https://bugs.launchpad.net/bugs/138228
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