Printing “powernow-k8 transition frequency failed” after install XEN

After I installed XEN hypervisor, the tty0 (CTRL+ALT+F1) prints “powernow-k8 transition frequency failed” to STDOUT continously, how to solve it?

sudo rmmod powernow_k8

From https://lists.debian.org/debian-user/2013/01/msg00754.html

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How to make the settings persistent (take effect after reboot)?

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1, Create script file ‘/etc/init.d/stop_pwoerk8.sh’ as follows.

harry2vera@node1:/etc/init.d$ cat stop_pwoerk8.sh 
#! /bin/sh

rmmod powernow_k8

2, Add the full PATH of it into ‘/etc/rc.local’ file as follows.

harry2vera@node1:/etc/init.d$ cat /etc/rc.local
#!/bin/sh -e
#
# rc.local
#
# This script is executed at the end of each multiuser runlevel.
# Make sure that the script will "exit 0" on success or any other
# value on error.
#
# In order to enable or disable this script just change the execution
# bits.
#
# By default this script does nothing.

/etc/init.d/stop_pwoerk8.sh

exit 0

NOTE: I tested above solution on debian Wheezy.

References: http://stackoverflow.com/questions/12973777/how-to-run-a-shell-script-at-startup