I turned off thermald with: sudo service thermald stop It says turbo mode is enabled, but the frequency is very low, and I'm sure for the exact same task (here compiling Scala code) the computer was much more noisy/fast before upgrading Ubuntu. My processor: Intel® Core™ i7-3687U CPU 2.10GHz × 4 Note that at the beginning the Bzy_MHz column goes close to 3 Ghz, but then stabilizes near 1 Ghz. How am I supposed to make it work? All the stuff I found online only say to use turbostat, but that does not really help to solve the problem. I'm not an expert but it looks like turbo does not work, right? Sending work to 4 procs, turbostat shows: CPU Avg_MHz %Busy Bzy_MHz TSC_MHz I also noticed that my computer became much less noisy on heavy tasks, and it looks like my i7's Turbo boost does not kick in. I've upgraded to Ubuntu 16.04 and since then I noticed my computer became way slower than before on certain heavy tasks.

I have a Dell XPS 13 (developer edition) which I bought some years ago with Ubuntu 12.04 preinstalled.

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