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Comment by devrandomguy | Hacker News Reader

The power management app that comes with KDE/Plasma does a pretty good job with my laptop battery, certainly no worse than Windows did. It throttles back the CPU, dims the screen depending partly on user activity, has sensible policies and notifications for stretching out that last 10% of the battery. It also allows apps to request an exception from power management. What's wrong with the current OSS PM tools?

In my experience, the most effective power management tool on any device is actually just airplane mode.

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On my laptops, tlp on Ubuntu/Debian/Arch (when I used those) and tuned on Fedora (which I've used since F25) have been awesome, so power management is unlikely to be the biggest issue with this phone.

Off-topic, but how do you feel tlp and tuned compare? tlp is available in Fedora repos, along with tuned, and I wonder which gives a better result.

I've used both on Fedora, and found tuned to be easier-to-use and more effective. tlp also does not work well with SELinux, and as such causes a flurry of errors every time you change the power state (sleep, resume, plug, unplug), which may be part of why I found it ineffective.

The way I set up my tuned profile is pretty simple:

    sudo dnf install tuned-utils
    sudo powertop2tuned -n laptop

Then, I edited the profile in `/etc/tuned/laptop/tuned.conf` and enabled things. On my Thinkpad X220, simply enabling everything worked great, but my Asus ROG laptop and my friend's Razer Blade had issues with that, so YMMV wrt what to enable. Then, I added USB autosuspend support by adding the following to the profile:

    [usb]
    autosuspend = 1

After that, I ran `sudo tuned-adm profile laptop`, which sets it and tells tuned to start on boot, and have had vastly improved battery life, good performance, and no hassles since.

Excellent, thank you. I've followed your instructions and am waiting to see how it all goes. My laptop is an X230, so should be similar to your experience.

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