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. CPUFreq Scaling Tests With AMD's Kaveri On Linux 3.16
  2. Enabling HyperZ Is Still An Easy Way For Faster RadeonSI Performance
  3. AMD Kaveri: Catalyst vs. RadeonSI Gallium3D On Linux
  4. Linux OpenCL Performance With The Newest AMD & NVIDIA Drivers
Latest Linux News
  1. Proposed: A Tainted Performance State For The Linux Kernel
  2. Systemd 216 Piles On More Features, Aims For New User-Space VT
  3. Mesa 10.2.6 Has Plenty Of OpenGL Driver Bug Fixes
  4. Wasteland 2 Gets An Official Release Date
  5. Dead Island For Linux Appears Imminent
  6. LXQt 0.8 Is Being Released Soon
  7. Linux 3.17 Lands Memfd, A KDBUS Prerequisite
  8. Humble Jumbo Bundle 2 Shafts Linux Gamers
  9. Ubuntu 14.10's Feature Freeze Is This Wednesday
  10. New VM Software Claims To Be 4.5x Faster Than QEMU
Latest Forum Discussions
  1. The dangers of Linux kernel development
  2. Dead Island for Linux (?)
  3. Updated and Optimized Ubuntu Free Graphics Drivers
  4. AMD Offers Mantle For OpenGL-Next, Pushes Mantle To Workstations
  5. Next-Gen OpenGL To Be Announced Next Month
  6. OpenGL 4.5 Released With New Features
  7. Updated graphics drivers for Ubuntu 12.04 Precise LTS
  8. Builder: A New Development IDE Being Built For GNOME