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 3.14 Gets New Acceleration, Still Lacking PM

Nouveau

Published on 23 January 2014 07:14 AM EST
Written by Michael Larabel in Nouveau
11 Comments

The Nouveau open-source NVIDIA kernel driver changes for the Linux 3.14 kernel are now known. The Nouveau changes are exciting in having hardware acceleration support for some new GPUs but is less exciting as it's yet another kernel release without proper dynamic power management / re-clocking support.

Merged into David Airlie's drm-next Git branch as the code that will then be sent by the DRM subsystem maintainer into the mainline Linux kernel were the queued up Nouveau changes. The latest work shows this reverse-engineered NVIDIA driver making progress, but still months after NVIDIA pledged support to NVIDIA the biggest downfall of this driver is its inability to proper reclock the GPU.

The Nouveau driver runs the graphics card at whatever core and memory frequencies were programmed at boot. GPUs with Nouveau are thus forced to either run at very low speeds -- for modern hardware with low boot frequencies, in which case the performance is crippling -- or with higher frequencies on older NVIDIA GPUs but with being power inefficient and hot even when the system is idling. For older NVIDIA GeForce GPUs is experimental re-clocking / power management support that's disabled by default and not always reliable while the Kepler/Fermi support is basically non-existent to end-users. Read Nouveau Reclocking: Buggy, But Can Boost Performance for more details along with Nouveau Re-Clocking, NVIDIA vs. Nouveau Drivers.

With the Nouveau DRM driver changes for Linux 3.14 is continued work on the new re-clocking code for Nouveau, but it's not yet ready for end-users and is disabled by default.

Nouveau 3.14 Gets New Acceleration, Still Lacking PM

Besides working towards power management, there's also acceleration support for the GK110 and GK208 graphics processors. The GK110 is the graphics core that powers the GeForce GTX 780 and GeForce GTX TITAN graphics cards. NVIDIA's GK208 meanwhile is what's found on the low-end GeForce GT 630 and GT 640 graphics cards. With Linux 3.14 is now kernel-side support for these newer graphics processors. These GPUs utilize Nouveau's existing self-generated "chsw" microcode.

Complementing the work towards power management and GK110/GK208 acceleration support are error reporting improvements, overlay improvements, and random other changes. The overlay support includes YUYV support for the NV10 and video overlay support coming for the first time to the old NV04/NV05 hardware. The NV04 was the original Riva TNT and TNT2 graphics cards.

In total this pull request has 12,385 lines of new code while 5,834 lines of code removed. The pull into drm-next for its merging into the mainline Linux kernel in the days ahead can be found here.

This Nouveau 3.14 information rounds out knowing the details already on the Radeon changes, the Intel improvements, and major SVGA2 changes.

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. AMD's RadeonSI Driver Sped Up A Lot This Summer
  2. Intel's Latest Linux Graphics Code Competes Against OS X 10.9
  3. Intel Sandy Bridge Gets A Surprise Boost From Linux 3.17
  4. Open-Source Radeon Graphics Have Some Improvements On Linux 3.17
Latest Linux News
  1. GNOME/GTK+ Human Interface Guidelines Updated
  2. The Widely-Criticized New Commercial Linux Distro Is Now On Kickstarter
  3. CUDA 6.5 Is Doing Great For Blender
  4. Wayland & Weston 1.6 Alpha Released
  5. Nouveau Gets Improved Re-Clocking Handling For Select GPUs
  6. A New First-Person Mystery Game Might Be Coming To Linux
  7. Patch By Patch, LLVM Clang Gets Better At Building The Linux Kernel
  8. VC4 Gallium3D Driver Now Handles X With GLAMOR
  9. Opera 25 Development Release For Linux
  10. Steam Now Supports VA-API For In-Home Game Streaming
Latest Forum Discussions
  1. Btrfs Gets Talked Up, Googler Encourages You To Try Btrfs
  2. Systemd 216 Piles On More Features, Aims For New User-Space VT
  3. OSS radeon driver for A10-7850K (Kaveri)
  4. American Citizens running AMOK for food stamps
  5. What Linux Distribution Should Be Benchmarked The Most?
  6. Company I work for is looking to contribute to Open Source projects... but wrongly?
  7. Microsoft vs. Campaign
  8. Updated and Optimized Ubuntu Free Graphics Drivers