1. Computers
  2. Display Drivers
  3. Graphics Cards
  4. Memory
  5. Motherboards
  6. Processors
  7. Software
  8. Storage
  9. Operating Systems


Facebook RSS Twitter Twitter Google Plus


Phoronix Test Suite

OpenBenchmarking.org

Tweaks To Extend The Battery Life Of Intel Linux Notebooks

Michael Larabel

Published on 24 August 2011
Written by Michael Larabel
Page 2 of 4 - 16 Comments

The various kernel options were tested in an automated manner using the Phoronix Test Suite and the MATISK module for easy context-driven benchmarking.

Besides testing each kernel option alone, tests were also done with all options enabled and then also when forcing the PCI Express Active-State Power Management functionality. Fortunately, none of these kernel options had left the Hewlett-Packard EliteBook Sandy Bridge notebook being unstable or with any other apparent issues.

Tests profiles used included the battery-power-usage (idling, DPMS screen blanking, and video playback), OpenArena, and Nexuiz OpenGL benchmarks.

First is a look at the results for the Battery Power Usage test of idling at the Unity desktop, idling while the screen is powered off, and then when the screen is re-enabled with a short video being played back via MPlayer. Enabling RC6 was the biggest benefit with the power consumption dropping by 26% compared to the stock Linux 3.1 kernel. Enabling frame-buffer compression was not too useful for this test, down-clocking the LVDS dropped the power consumption by about 5%, and the already well tested PCI Express Active-State Power Management forcing dropped the power consumption by about 9%. When all of these options were enabled, the Sandy Bridge notebook power consumption went from an average of 17.75 Watts to 13.05 Watts, or a reduction of about 27% when all options were enabled together.

Latest Articles & Reviews
  1. Khronos Group Announces Vulkan, OpenCL 2.1, SPIR-V
  2. Samsung 850 EVO SSD Linux Benchmarks
  3. Kubuntu 15.04 Is Turning Out Quite Nice, Good Way To Try Out The Latest KDE
  4. 5-Way Linux Distribution Comparison On The Core i3 NUC
  5. OCZ ARC 100 Linux SSD Benchmarks
  6. Lenovo ThinkPad X1 Carbon Works Great As A Linux Ultrabook
Latest Linux News
  1. NVIDIA Announces Shield Set-Top Gaming Box
  2. Valve Launches $49 Steam Link, SteamOS-Powered Streaming Device
  3. Valve Announces Source 2, It's Going To Be Free To Content Developers
  4. Gitorious Gets Acquired By GitLab
  5. Unity 5.0 Brings PhysX 3.3, WebGL Preview, Animation System Work
  6. Linux 4.0-rc2 Kernel Released After Delay Due To Intel DRM Driver
  7. Linux 3.19 Officially Lands For Ubuntu 15.04
  8. Clutter Now Supports Quad-Buffer Stereo Displays, Mir Backend
  9. Pricing Details On The Alleged MJ Ubuntu Tablet Design
  10. Understanding The Linux Kernel's BPF In-Kernel Virtual Machine
Most Viewed News This Week
  1. More Proof That Allwinner Is Violating The GPL
  2. The Tremendous Features Of Fedora 22
  3. Krita 2.9 Released, Their Biggest Release Ever
  4. A Single UEFI Executable With The Linux Kernel, Initrd & Command Line
  5. Xfce 4.12 Released After Nearly Three Years Of Work
  6. LLVM 3.6 & Clang 3.6 Deliver More Features, Complete C++14 Support
  7. ALSA 1.0.29 Released
  8. Canonical's Latest Demo Of Ubuntu Unity 8 Convergence In Action
%%CLICK_URL_UNESC%%