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

Nouveau Fan Management Code Published

Nouveau

Published on 29 August 2011 12:07 PM EDT
Written by Michael Larabel in Nouveau
13 Comments

At long last, if your computer has previously sounded like a jet engine when using the open-source Nouveau driver with your NVIDIA GeForce/Quadro graphics card, there is a solution. Fan management code has now been published by the Nouveau developers to support controlling the graphics card's fan speed when using this in-kernel Linux driver.

Martin Peres writes to the Nouveau mailing list this morning, "Just saw the bitching on Phoronix about lack of fan management in nouveau (no offence Michael, it was justified ;)). Since it has been working flawlessly for more than a week on my desktop, I decided to let you guys know about it and ask for testing."

This power management code for thermal support is currently hosted on Gitorious. This DRM branch supports controlling "PWM" (Pulse Width Modulation) fans with a speed between zero (off) and 100% speed.

Some NVIDIA graphics cards don't use PWM-type fans but rather can only be toggled on and off. Code has been written for these more basic fans, but it hasn't yet been tested for lack of hardware. Fortunately, those fans tend to be in low-end graphics cards anyways where they aren't as noisy.

There's also I2C-accessible fans in high-end NVIDIA graphics cards, but all that the Nouveau driver can do is launch the respective hwmon driver. The hwmon Linux interface currently doesn't let other kernel drivers access the I2C chip methods, but the Nouveau developers are working with the hwmon team to enable such support.

For now, this working fan management support is mostly about PWM fans. This should work for NVIDIA GPUs up to (but not including) the NVA3. The fan speed can be controlled via the sysfs interface. The Nouveau kernel driver supports disabling fan management (the fan runs at 100% continuously), manual fan management, automatic fan management, linear fan management, or even thermal management to target a particular GPU temperature.

On top of the fan management call for testing, Martin also says that soon he will have some power management code ready for testing! Another long sought after Nouveau feature. Hopefully this comes with GeForce 400/500 "Fermi" re-clocking support and I will be happy.

See this mailing list message to find out how to test the Nouveau fan management support. With a bit of luck we could see this support land in the Linux 3.2 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. Preview: AMD's FX-9590 Eight-Core At Up To 5.0GHz On Linux
  2. Intel Launches The Core i7 5960X, Mighty Powerful Haswell-E CPUs
  3. AMD Radeon R9 290: Gallium3D vs. Catalyst Drivers
  4. AMD Radeon R9 290 Open-Source Driver Works, But Has A Ways To Go
Latest Linux Articles
  1. How Intel Graphics On Linux Compare To Open-Source AMD/NVIDIA Drivers
  2. The Fastest NVIDIA GPUs For Open-Source Nouveau With Steam Linux Gaming
  3. Testing For The Latest Linux Kernel Power Regression
  4. The Most Energy Efficient Radeon GPU For AMD Linux Gaming
Latest Linux News
  1. Nouveau X.Org Driver Released With DRI3+Present, Maxwell, GLAMOR
  2. Microsoft & AMD Release C++ AMP Compiler With Linux Support
  3. AMD, Wine & Valve Dominated August For Linux Users
  4. Linux 3.17-rc3 Kernel Released Back On Schedule
  5. Lennart Poettering Talks Up His New Linux Vision That Involves Btrfs
  6. Mesa 10.3 RC2 Arrives Via Its New Release Manager
  7. Ubuntu 14.10's Lack Of X.Org Server 1.16 Gets Blamed On AMD
  8. MSI Motherboard BIOS Updating Remains A Pain For Linux Users
  9. See How Your Linux System Performs Against The Latest Intel/AMD CPUs
  10. AMD Steppe Eagle Flys To Coreboot
Latest Forum Discussions
  1. Lennart Poettering Talks Up His New Linux Vision That Involves Btrfs
  2. The dangers of Linux kernel development
  3. Updated and Optimized Ubuntu Free Graphics Drivers
  4. AMD Releases UVD Video Decode Support For R600 GPUs
  5. SSD seems slow
  6. Is laptop with Intel CPU and AMD dGPU worth buying considering especially AMD Enduro?
  7. Radeon HD5670 and Ubuntu 14.04
  8. Btrfs Gets Talked Up, Googler Encourages You To Try Btrfs