I had the same issue, but got it fixed by changing from the default 2.6.20-14-generic kernel to the 2.6.20-14-386 version. Speedstep is now working fine both plugged in and unplugged! :)
-- No Dothan centrino speed step in Feisty Beta https://bugs.launchpad.net/bugs/98552 You received this bug notification because you are a member of Ubuntu Bugs, which is the bug contact for Ubuntu. -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs