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. Ubuntu 15.04 Offers Faster OpenGL For AMD Radeon GPUs On Open-Source
  2. Ubuntu 15.04 Brings Some Graphics Performance Improvements For Intel Haswell
  3. Sub-$20 802.11n USB WiFi Adapter That's Linux Friendly
  4. The Lenovo T450s Is Working Beautifully With Linux
  5. Linux 4.0 SSD EXT4 / Btrfs / XFS / F2FS Benchmarks
  6. Linux 4.0 Hard Drive Comparison With Six File-Systems
Latest Linux News
  1. GCC 5.2 Will Come In Two To Three Months
  2. AMD FP3 Motherboard Ported To Coreboot
  3. The Difference In Optimizations Between NIR & GLSL
  4. OpenMandriva Lx 3 Alpha: Adds UEFI Support, Defaults To LXQt
  5. Systemd Kills Off Shutdownd
  6. There's Now More Than 1,100 Games On Steam For Linux
  7. Btrfs In Linux 4.1 Has Fixes For File-Systems Of 20 Terabytes & Up
  8. Microsoft's CoreCLR Now Works On FreeBSD
  9. Unigine 2.0 Beta 2 Brings PBR, SSR, Kinect 2 Support
  10. KDBUS Still Hasn't Been Pulled, Might Not Land For Linux 4.1
Most Viewed News This Week
  1. AMD Releases New "AMDGPU" Linux Kernel Driver & Mesa Support
  2. Ubuntu's Desktop-Next Switching From .DEBs To Snappy
  3. EXT4 In Linux 4.1 Adds File-System Level Encryption
  4. My Favorite Computer Desk Of The Past Decade For Less Than $100
  5. AMD Open-Sources "Addrlib" From Catalyst
  6. Library Operating System (LibOS) For Linux Still Being Pursued
  7. Linux-Powered Endless Computer Raises $100k+ In A Few Days
  8. Features Thus Far For The Linux 4.1 Kernel