edit the "lv" file in /usr/share/kernel-power-settings

you should see something like 54:950. just change it to 56:950.

install nano to do it.

root
apt-get install nano
cd /usr/share/kernel-power-settings
nano lv
make your edits....
ctrl+x (to quit)
y (to save)
enter (to save with same name)
kernel-config load lv