FN-F3 on IdeaPad S10: no ACPI-Events after upgrade from 8.04/8.10

[schauy]

Binary package hint: acpi

expected: ACPI event for FN-F3 in 8.04 was correctly identified with the line "event=video.* GFX0.* 00000080" in "/etc/acpi/events/videobtn"

what happened: no events triggered

Info:
I upgraded from 8.04 to 8.10 to 9.04

####systeminfo####

user@machine:~$ lsb_release -rd
Description: Ubuntu 9.04
Release: 9.04

----------------
user@machine:~$ apt-cache policy acpi
acpi:
  Installiert: 1.2-1ubuntu1
  Kandidat: 1.2-1ubuntu1
  Versions-Tabelle:
 *** 1.2-1ubuntu1 0
        500 http://de.archive.ubuntu.com jaunty/universe Packages
        100 /var/lib/dpkg/status

----------------

user@machine:~$ acpi_listen ==> no output

----------------

user@machine:~$ xev | grep -A2 --line-buffered '^KeyRelease' | sed -n '/keycode /s/^.*keycode \([0-9]*\).* (.*, \(.*\)).*$/\1 \2/p'
37 Control_L

----------------

user@machine:~$ sudo showkey -k
[sudo] password for user:
KB-Modus war RAW
[ Wenn Sie das unter X probieren, muss es nicht funktionieren,
  da der X Server ebenfalls von /dev/console liest. ]

Drücken Sie eine Taste (Programmende 10 s nach dem letzten Tastendruck)...
Tastencode 29 gedrückt
Tastencode 4 gedrückt
Tastencode 4 losgelassen
Tastencode 29 losgelassen

ProblemType: Bug
Architecture: i386
Dependencies:
 libgcc1 1:4.3.3-5ubuntu4
 gcc-4.3-base 4.3.3-5ubuntu4
 findutils 4.4.0-2ubuntu4
 libc6 2.9-4ubuntu6
DistroRelease: Ubuntu 9.04
Package: acpi 1.2-1ubuntu1
ProcEnviron:
 PATH=(custom, user)
 LANG=de_DE.UTF-8
 SHELL=/bin/bash
SourcePackage: acpi
Uname: Linux 2.6.28-11-generic i686