Comment 5 for bug 21345

just in case somebody faces the same problem, i found out that swithing off the
event sound(from audio setting) makes the computer comes back to its normall
speed. in other words thus bug is a sound bug, for some reasons after resume
sound would hang.
i do not know how sound works under ubuntu, is there a sound server which i can
reboot? or how can i make further debuging?
thanks and greetings.