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."

About The Author
Michael Larabel is the principal author of Phoronix.com and founded the web-site in 2004 with a focus on enriching the Linux hardware experience and being the largest web-site devoted to Linux hardware reviews, particularly for products relevant to Linux gamers and enthusiasts but also commonly reviewing servers/workstations and embedded Linux devices. Michael has written more than 10,000 articles covering the state of Linux hardware support, Linux performance, graphics hardware drivers, and other topics. Michael is also the lead developer of the Phoronix Test Suite, Phoromatic, and OpenBenchmarking.org automated testing software. He can be followed via and or contacted via .
Latest Linux Hardware Reviews
  1. Intel Xeon E5-1680 v3 & E5-2687W v3 Compared To The Core i7 5960X On Linux
  2. Intel 120GB 530 Series SSD Linux Performance
  3. Btrfs/EXT4/XFS/F2FS RAID 0/1/5/6/10 Linux Benchmarks On Four SSDs
  4. AMD's Windows Catalyst Driver Remains Largely Faster Than Linux Drivers
Latest Linux Articles
  1. NVIDIA vs. Nouveau Drivers With Linux 3.18 + Mesa 10.4-devel
  2. Is The Open-Source NVIDIA Driver Fast Enough For Steam On Linux Gaming?
  3. Linux 3.18 File-System Performance Minimally Changed But Possible Regressions
  4. AMD Radeon Gallium3D Is Catching Up & Sometimes Beating Catalyst On Linux
Latest Linux News
  1. Linux 3.18-rc6 Released, A Worrisome Regression Remains
  2. HandBrake 0.10 Brings H.265 & VP8 Encoders
  3. Gngr: A New Web Browser Focused On Privacy
  4. Linux 3.18 Kernel: Not Much Change With Intel Haswell Performance
  5. More File-System Tests Of The Linux 3.18 Kernel
  6. Using NVIDIA's NVENC On Linux With FFmpeg
  7. There's Talk Again About An "Open To The Core" Ubuntu Laptop
  8. PowerVR SGX Driver Code Gets Leaked
  9. V2 Of KDBUS Published For Linux Kernel Review
  10. VirtualBox 4.3.20 Arrives, Still No Sign Of VirtualBox 4.4
Latest Forum Discussions
  1. PulseAudio 6.0 Is Coming & Other Linux Audio Plans For The Future
  2. Debian Developer Resigns From The Systemd Maintainership Team
  3. Roadmap to Catalyst 14.10 ?
  4. Updated and Optimized Ubuntu Free Graphics Drivers
  5. Cant get working Kaveri APU - A10-7850k
  6. Script for Fan Speed Control
  7. Debian Init System Coupling Vote Results
  8. The Slides Announcing The New "AMDGPU" Kernel Driver