VMWare workstation: why Virtual Machine cannot start?

Not sure if users don't use Fedora get this error or not, but if you face with this error message:

unable to change virtual machine power state cannot find a valid peer process to connect to.

and your Virtual machine cannot start, my solution:

do a quick kill:

for i in `ps -ef | grep vm|awk '{print $2}'`;do sudo kill -9 $i; done

then start vmware, power on VM again.
my short note :).