Ubuntu – XPS 15 stuck on 800MHz


I'm running Ubuntu 16.04 with CPU: i7-6700. Even with one of the cores sitting on 100% utilisation cpufreq-info reports.

analyzing CPU 7:
  driver: intel_pstate
  CPUs which run at the same hardware frequency: 7
  CPUs which need to have their frequency coordinated by software: 7
  maximum transition latency: 0.97 ms.
  hardware limits: 800 MHz - 3.50 GHz
  available cpufreq governors: performance, powersave
  current policy: frequency should be within 800 MHz and 3.50 GHz.
                  The governor "performance" may decide which speed to use
                  within this range.
  current CPU frequency is 800 MHz.

Each CPU shows 800 MHz. How do I get my CPU frequency to increase under load?

Best Answer

Thanks for the suggestions. It seems to be an issue that a few have come up against where the processor gets stuck in a throttled state. I've tried the suggested solution of removing the battery and it is now running at full speed again. Unfortunately this has the effect of clearing other bios settings. This was on a Dell XPS 9550.