solved by

yum reinstall polkit systemd


On Tue, Nov 27, 2012 at 1:07 PM, Arindam Choudhury <arindamchoudhury0@gmail.com> wrote:
Hi,

I am new to rawhide. I used yum to rawhide. I did it on a fresh install of fedora 17.

after the update, when I restarted my system. I boot process stuck at:

Failed to start Authorization Manager.
see "systemctl status polkit.service" for details
started LSB: starts and stops login iSCSI daemon