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

Ubuntu 12.04 LTS Will Try For Intel RC6 By Default

Ubuntu

Published on 19 February 2012 07:01 AM EST
Written by Michael Larabel in Ubuntu
7 Comments

It seems that the Ubuntu Kernel Team is indeed taking power management serious for Ubuntu 12.04 LTS. The kernel team announced this weekend that they will be attempting to enable Intel RC6 power-savings by default within the Precise Pangolin kernel.

Having RC6 in Ubuntu 12.04 LTS isn't resulting in any original work by Canonical/Ubuntu, but rather it was last week when Intel announced they believe they finally have RC6 support in shape and will be enabling it by default when it comes time for the Linux 3.4 kernel merge window. The kernel team is back-porting the patches to their Linux 3.2 kernel. What the patches did is just enable basic RC6 support by default for Sandy Bridge while only exposing the deep and deepest RC6 power-savings states via a kernel module parameter.

Read Intel Tries To Fix RC6 Support Once Again and Intel Flip-Flops Again: RC6 Disabled For Linux 3.2 for the scope of the situation. This has been a constant battle for Intel's open-source developers on Sandy Bridge, but at least for the next-generation Ivy Bridge hardware its more reliable.

RC6 is quite good since it allows bringing down the graphics core to consuming 0V when allowed and it's also capable of boosting the system's graphics performance, as Phoronix tests have shown. I also happen to have more RC6 benchmarks coming out in the next week or so, the tests are already done of normal RC6, deep RC6, and the deepest RC6 states, but right now is just sitting in the publishing queue. While this is focused on conserving battery power, RC6 also helps out on Intel desktops too.

The kernel team for Ubuntu enabled Sandy Bridge RC6 by default in the 3.2.0-17.26 Precise kernel. Their mailing list message mentions, "We have decided to post a widespread call for testing from Sandy Bridge owners running Ubuntu 12.04. We hope to capture data which supports the the claims of power saving improvements and therefore justify keeping these patches in the Ubuntu 12.04 kernel."

Latest Linux Hardware Reviews
  1. Mini-Box M350: A Simple, Affordable Mini-ITX Case
  2. Overclocking The AMD AM1 Athlon & Sempron APUs
  3. AMD Athlon 5350 / 5150 & Sempron 3850 / 2650
  4. Upgraded Kernel & Mesa Yield A Big Boost For Athlon R3 Graphics
Latest Linux Articles
  1. AMD OpenCL Performance With AM1 Kabini APUs
  2. A Quick Look At GCC 4.9 vs. LLVM Clang 3.5
  3. Are AMD Athlon/Sempron APUs Fast Enough For Steam On Linux?
  4. AMD Athlon's R3 Graphics: RadeonSI Gallium3D vs. Catalyst
Latest Linux News
  1. R600 Gallium3D Disables LLVM Back-End By Default
  2. Fedora 21 Gets GNOME 3.12, PHP 5.6, Mono 3.4
  3. Fedora Workstation Is Making Me Quite Excited
  4. Maynard: A Lightweight Wayland Desktop
  5. Chromium Browser Going Through Growing Pains In Ubuntu 14.04
  6. KDE 4.13 Is Being Released Today With New Features
  7. Trying Out Radeon R9 290 Graphics On Open-Source
  8. Intel Broadwell GT3 Graphics Have Dual BSD Rings
  9. Early Linux 3.15 Benchmarks Of Intel Core i7 + Radeon
  10. Red Hat Releases Its RHEL 7 Release Candidate
  11. New Features Coming To Xubuntu 14.04 LTS
  12. NVIDIA Officially Releases CUDA 6
Latest Forum Discussions
  1. Linux Kernel Developers Fed Up With Ridiculous Bugs In Systemd
  2. After Jack Keane, RuseSoft will briing Ankh 3 to Linux through Desura
  3. Change installation destination from home directory
  4. Updated and Optimized Ubuntu Free Graphics Drivers
  5. The GNOME Foundation Is Running Short On Money
  6. Bye bye BSD, Hello Linux: A Sys Admin's Story
  7. New tool for undervolt/overclock AMD K8L and K10 processors
  8. How to enable opengl 3.3 on r9 270?