As acpi Increase detail in the log file?

I’m trying to increase the level of acpi vervose in SLED11 SP1.
Edit /etc/sysconfig/powersave/common defining ‘DEBUG=20’ but not notice any changes in /sys/module/acpi/parameters/debug_level

so I decided to do it directly with:
echo 0x200000 > /sys/module/acpi/parameters/debug_level

but I still see change log level in /var/log/messages or /var/log/acpi

Am I doing something wrong?
As increase the log level of acpi?

Thank you.