Description of problem: The patch for BZ 502826 broke frequency scaling on Intel platforms. The reason for this is because it masked out the EST bit from dom0, which is necessary for frequency scaling to work properly. I'll attach a simple patch to revert just that change which seems to fix the problem in my testing.
Created attachment 382276 [details] Fix frequency scaling on Intel
An advisory has been issued which should help the problem described in this bug report. This report is therefore being closed with a resolution of ERRATA. For more information on therefore solution and/or where to find the updated files, please follow the link below. You may reopen this bug report if the solution does not work for you. http://rhn.redhat.com/errata/RHSA-2010-0178.html