It was mentioned earlier but not so explicitly: ThinkPad firmware throttles the CPU if the machine is running on a 65W power supply with no battery installed.
See, e.g., http://forums.lenovo.com/t5/X-Series-Tablet-ThinkPad- Laptops/X61-Your-power-adapter-may-be-cheating-you/td-p/17870 -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/519142 Title: ThinkPad T43 CPU scaling (ondemand/fixed/..) not working correctly - Ubuntu 9.10/10.4 (stock & mainline) To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/519142/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
