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

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 Linux Hardware Reviews
  1. Trying The Configurable 45 Watt TDP With AMD's A10-7800 / A6-7400K
  2. Sumo's Omni Gets Reloaded
  3. AMD A10-7800 & A6-7400K APUs Run Great On Linux
  4. Radeon Gallium3D Is Running Increasingly Well Against AMD's Catalyst Driver
Latest Linux Articles
  1. Intel's Latest Linux Graphics Code Competes Against OS X 10.9
  2. Intel Sandy Bridge Gets A Surprise Boost From Linux 3.17
  3. Open-Source Radeon Graphics Have Some Improvements On Linux 3.17
  4. CPUFreq Scaling Tests With AMD's Kaveri On Linux 3.16
Latest Linux News
  1. DirectFB Updates GTK3 Support, Working Towards DirectFB 1.8
  2. Userptr Support Set For AMD Radeon GPUs In Linux 3.18
  3. NVIDIA Releases CUDA 6.5 As A Huge Update
  4. GNOME 3.14 Beta Makes GLSL Optional, Supports Wayland Gesture/Touch Events
  5. KDE Software Compilation 4.14 Released
  6. The Many Things You Can Build With A Raspberry Pi
  7. AMD's Catalyst Linux Driver Preparing For A World Without An X Server?
  8. Khronos Publishes Its Slides About OpenGL-Next
  9. Proposed: A Tainted Performance State For The Linux Kernel
  10. Systemd 216 Piles On More Features, Aims For New User-Space VT
Latest Forum Discussions
  1. Systemd 216 Piles On More Features, Aims For New User-Space VT
  2. AMD Offers Mantle For OpenGL-Next, Pushes Mantle To Workstations
  3. Dead Island for Linux (?)
  4. The dangers of Linux kernel development
  5. Remote gui not accessible in Phoronix Test Suite 5.2
  6. Updated and Optimized Ubuntu Free Graphics Drivers
  7. Next-Gen OpenGL To Be Announced Next Month
  8. OpenGL 4.5 Released With New Features