A patch was proposed at: http://comments.gmane.org/gmane.linux.power-management.powertop/2170 It says that if the file exists then it will write to it.
It seems that a powertop --calibrate may be required after an empty file is created to get benifit from it. E.g. "sudo touch /var/cache/powertop/saved_parameters.powertop" as suggested. Note, you want to make sure of the permissions of this file, especially on multi- user systems. powertop --calibrate turns things on and off to test power usage. One suggestion said to let it run for an hour or so after and it will show estimates in a new column. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/855348 Title: Powertop wont work, it says every time I start it To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/powertop/+bug/855348/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
