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. MSI X99S SLI PLUS On Linux
  2. NVIDIA GeForce GTX 970 Offers Great Linux Performance
  3. CompuLab Intense-PC2: An Excellent, Fanless, Mini PC Powered By Intel's i7 Haswell
  4. From The Atom 330 To Haswell ULT: Intel Linux Performance Benchmarks
Latest Linux Articles
  1. RunAbove: A POWER8 Compute Cloud With Offerings Up To 176 Threads
  2. 6-Way Ubuntu 14.10 Linux Desktop Benchmarks
  3. Ubuntu 14.10 XMir System Compositor Benchmarks
  4. Btrfs RAID HDD Testing On Ubuntu Linux 14.10
Latest Linux News
  1. openSUSE Factory & Tumbleweed Are Merging
  2. More Fedora Delays: Fedora 21 Beta Slips
  3. Mono Brings C# To The Unreal Engine 4
  4. Coreboot Now Has Support For Intel Broadwell Hardware
  5. Enlightenment's EFL 1.12 Alpha Has Evas GL-DRM Engine, OpenGL ES 1.1 Support
  6. GTK+ Lands Experimental Backend For Mir Display Server
  7. Ubuntu 14.10 Officially Released
  8. Mesa 10.4 Might Re-Enable HyperZ For R600g/RadeonSI
  9. Intel GVT-g GPU Virtualization Moves Closer
  10. GTK+ 3.16 To Bring Several New Features
Latest Forum Discussions
  1. Updated and Optimized Ubuntu Free Graphics Drivers
  2. Ubuntu 16.04 Might Be The Distribution's Last 32-Bit Release
  3. Linux hacker compares Solaris kernel code:
  4. HOPE: The Ease Of Python With The Speed Of C++
  5. Advertisements On Phoronix
  6. Users/Developers Threatening Fork Of Debian GNU/Linux
  7. AMD Releases UVD Video Decode Support For R600 GPUs
  8. Proof that strlcpy is un-needed