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Time for a new battery.


OK. I'll look into that. Thanks.

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Also ensure that Ubuntu is set for the "on demand" CPU governor ("Performance Profile") (if available) in both battery and AC powered modes (right click on the power/battery icon).


It's set to "userspace" right now. It seems that "userspace" and "ondemand" both do frequency scaling. Is there something else different that I'm missing?
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-- roger