Under Fefora, how to solve hanging on Loaded plugins: refresh-packagekit while "yum -y install liblzo2-dev"

[root@fedora mtd-utils]# yum -y install liblzo2-dev
Loaded plugins: refresh-packagekit   < hang, can not go on.....

This problem  can be solved by configuring

Applications->System Tools->KPackageKit->Settings->"Check for updates" : Never..