The problem was caused from the line
echo 2 > /sys/module/processor/parameters/max_cstate
that I added in the /etc/init.d/acpid file, using this tutorial on Hardy: https://help.ubuntu.com/community/MacBook2-1/Hardy
By removing the above lline every works fine.
The problem was caused from the line
echo 2 > /sys/module/ processor/ parameters/ max_cstate
that I added in the /etc/init.d/acpid file, using this tutorial on Hardy: https:/ /help.ubuntu. com/community/ MacBook2- 1/Hardy
By removing the above lline every works fine.