./test_off.sh in acpi_call module fail

[nicocmoi81]

DSDT.dsl and SSDT tables following these instructions

http://linux-hybrid-graphics.blogspot.com/2010/07/using-acpicall-module-to-switch-onoff.html

I run up-to-date ubuntu 11.04 with 2.6.38-10-generic kernel for amd64 on a DELL Vostro 3750.

root@pc:/tmp/acpi_call# lspci -vnnn | perl -lne 'print if /^\d+\:.+(\[\S+\:\S+\])/' | grep VGA
00:02.0 VGA compatible controller [0300]: Intel Corporation 2nd Generation Core Processor Family Integrated Graphics Controller [8086:0116] (rev 09) (prog-if 00 [VGA controller])
01:00.0 VGA compatible controller [0300]: nVidia Corporation Device [10de:0df5] (rev a1) (prog-if 00 [VGA controller])