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 Benchmarking Platform
Phoromatic Test Orchestration

ASPM Linux Kernel Fix To Land Finally In 3.2 Series

Linux Kernel

Published on 06 February 2012 05:52 PM EST
Written by Michael Larabel in Linux Kernel
7 Comments

The proper solution to the Linux kernel ASPM power regression will finally be landing in the stable Linux 3.2 kernel series.

The proper ASPM fix devised by Red Hat's Matthew Garrett late in 2011 went into the Linux 3.3 kernel, which is still currently under active development. The ASPM fix has since been patched into the kernels of Ubuntu and Fedora, among other Linux distributions.

This testing has undergone enough testing and review now that it looks like it's did the trick to fix the PCI Express Active State Power Management regression for many systems.

Greg Kroah-Hartman, now at the Linux Foundation, is preparing a special Linux 3.2 stable release that simply incorporates this PCI-E ASPM change. "It's a bit different from other stable review cycles in that it only has one patch. It's a fix to decrease power consumption on a wide range of different machines. I wanted to make this a separate release to make it easier for people to test it out in a simple way. This patch has been shipping in the Fedora kernels for a while now, so I'm pretty confident about it, but I'm doing it this way just to be sure. Please let me know if anyone has any problems with it as soon as possible."

This ASPM-kernel-release will be the Linux 3.2.5 version as mentioned on the kernel mailing list.

The ASPM power regression is what I discovered in early 2011 and then subsequently automatically-bisected, among making other discoveries.

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 Articles & Reviews
  1. Turning A Basement Into A Big Linux Server Room
  2. NVIDIA's $1000+ GeForce GTX TITAN X Delivers Maximum Linux Performance
  3. OS X 10.10 vs. Ubuntu 15.04 vs. Fedora 21 Tests: Linux Sweeps The Board
  4. The New Place Where Linux Code Is Constantly Being Benchmarked
  5. 18-GPU NVIDIA/AMD Linux Comparison Of BioShock: Infinite
  6. Phoronix Test Suite 5.6 Adds New Phoromatic Enterprise Benchmarking Features
Latest Linux News
  1. Linux 4.0-rc6 Kernel Released
  2. Automatically Managing The Linux Benchmarks Firing Constantly
  3. The Big Features Of The Linux 4.0 Kernel
  4. Mesa's Android Support Is Currently In Bad Shape
  5. Wayland's Weston Terminal Can Now Be Minimized
  6. Phoronix - Working Towards Faster Page Loads
  7. Improved OpenCL Support For Blender's Cycles Renderer
  8. Mesa 10.5.2 Packs In A Handful Of Fixes
  9. More Fedora/Ubuntu Linux vs. OS X OpenGL Benchmarks
  10. Intel Adds Mesa IR To NIR Translator & Makes Other NIR Improvements
Most Viewed News This Week
  1. Introducing The Library Operating System For Linux
  2. Allwinner Continues Jerking Around The Open-Source Community
  3. Open-Source Driver Fans Will Love NVIDIA's New OpenGL Demo
  4. Systemd Change Allows For Stateless Systems With Tmpfs
  5. GNOME 3.16 Released: It's Their Best Release Yet
  6. GNOME Shell & Mutter 3.16.0 Released
  7. GNU Nano 2.4.0 Brings Complete Undo System, Linter Support & More
  8. Red Hat Is Rolling Out A VirtIO DRM/KMS GPU Driver