Confirming. Only my action is /etc/acpi/sonybright.sh instead of
xbacklight.sh.

And on this Sony VGN FE41E there is another thing, which will become
apparent when looking at the acpi events associated with these acpi
buttons:

  bright+
    sony/hotkey SNC 00000001 00000011  (press)
    sony/hotkey SNC 00000001 0000003b  (release)
  bright-
    sony/hotkey SNC 00000001 00000010  (press)
    sony/hotkey SNC 00000001 0000003b  (release)
  LCD/EXT
    sony/hotkey SNC 00000001 00000012  (press)
    sony/hotkey SNC 00000001 0000003b  (release)
  S1 (user-definable 1)
    sony/hotkey SNC 00000001 00000090  (press)
    sony/hotkey SNC 00000001 00000010  (release)
  S2 (user-definable 2)
    sony/hotkey SNC 00000001 00000091  (press)
    sony/hotkey SNC 00000001 00000011  (release)

It would be nice to bind S1 and S2 to acpi_fakekey, but with the release
event of S1/S2 colliding with the press event of bright+/bright-, this
still is a bit of a problem.

Nevertheless, it would be a good idea to replace SPIC with (SPIC|SNC) so
changing the brightness works out-of-the-box on certain Sony VAIO
laptops.

-- 
Add support for ACPI event handler for Sony Vaio with SNC controller
https://bugs.launchpad.net/bugs/240915
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