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I've installed Ubuntu (kernel 4.10.0-26-generic) on my Dell XPS 15 and so far everything is good. I made some low-hanging power consumption optimizations:

  • Disabled discrete Nvidia GPU
  • Installed TLP
  • Installed powertop and set all parameters to "Good"
  • Disabled touchscreen

Now in idle my power consumption, according to powertop, is around 7-10w.

But still, when I'm doing my usual work (running 1-2 Webstorm instances, Webpack dev server, browser with multiple tabs, wifi, sometimes music, brightness <50%), I'm not quite happy with battery life. Today I went from 100% to 40% in 2:30 hours.

I ran a 30 minutes powertop monitoring while doing my usual work, and it looks quite strange, it seems like the Intel GPU consumes too much power, but I'm not sure.

These are top 3 power consumers according to the powertop report:

Usage | Events/s | Category | Description | PW Estimate  
5676% | 33,5 | kWork | intel_mmio_flip_work_func | 170 W  
0,0% | 7,7 | Process | /opt/google/chrome/chrome | 50.9 mW  
1,3% | 0,00 | Timer | process_timeout | 38.7 mW  

And it doesn't make any sense, I mean, 170W? Really?

Full report can be seen here

What can I do to further optimize the power consumption?

Thanks.

  • 5676% usage? I suspect that powertop is confused or lying to you. – waltinator Jul 6 '17 at 14:24

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