Tested with Feisty 5. Ran "updatedb" and both processors scaled up to 2Ghz. Appears to work fine now. Reopen if you're still having the issue.
** Changed in: Ubuntu Status: Confirmed => Fix Released -- Frequency Scaling does not scale second core of Core Duo https://launchpad.net/bugs/51932 -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs