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

Testing 60+ Intel/AMD/NVIDIA GPUs On Linux With Open-Source Drivers

Michael Larabel

Published on 4 June 2014
Written by Michael Larabel
Page 2 of 13 - 22 Comments

First up are the issues encountered when testing the open-source driver on the NVIDIA graphics cards... For those out of the loop, the open-source NVIDIA driver support is provided by Nouveau, an independent, third-party driver project with the bulk of the work being done through reverse-engineering the proprietary NVIDIA Linux graphics driver. It wasn't until last year that NVIDIA began providing some support to Nouveau, which so far is in the form of a Maxwell graphics card sample, some basic documentation, code enablement for the GK20A Kepler GPU on the Tegra K1 SoC, and some other limited forms of support. Hopefully in the months ahead we will see continued (and ideally greater) support by NVIDIA Corp for this open-source driver.

The biggest limitation right now for the Nouveau driver is the lack of proper re-clocking support. With few exceptions, the Nouveau driver is limited to running at whatever frequencies the video BIOS programmed the hardware to at boot time. For most of the newer GPUs, these boot frequencies are extremely low, and thus the Nouveau performance is crippled with having the GPU core and video memory clock frequencies at a fraction of what the hardware are rated to run at. Nouveau developers have been working on re-clocking support for years, but it's one of the most complicated areas to deal with, especially for the newer Fermi/Kepler/Maxwell GPUs. This isn't an easy problem that will be fixed over night, unless NVIDIA was to devote some engineering resources to help tackle this big problem.

Regressions are also incredibly common when using the Nouveau driver between kernel and Mesa releases. With Nouveau being community driven, their resources are limited and they lack any formal QA process. With all their fiddling with the reverse-engineered driver between releases, regressions are semi-frequent for different GPUs, and I've characterized it as a game of Russian Roulette. Aside from the re-clocking issue, here's some of the problems I encountered when testing the NVIDIA graphics cards on the Linux 3.15 kernel and Mesa 10.3-devel:

GeForce 8500GT - The display would go dark after starting the OpenGL tests.

GeForce 8600GT - The GeForce 8600GT would run into issues when running Reaction Quake 3 (TTM error about failing to expire sync object before buffer eviction), Warsow would result in another problem (failed to idle channel and PGRAPH errors), and Unvanquished would result in PGRAPH errors.

GeForce 8800GT - There were GPU lock-ups with this graphics card too when loading Tesseract. There were also issues encountered about failing to idle the channel produced by the Nouveau DRM driver and PGRAPH errors with Reaction -- similar to the 8800GT. Some corrupted text was also encountered on some boots.

GeForce 9600GSO - The GeForce 9600GSO was running into font rendering issues.

GeForce GT 240 - The GeForce GT 240 would mode-set correctly and show Plymouth while booting, but when it came to loading the Nouveau DDX for the Ubuntu desktop, the screen would become corrupted in a checkerboard-like pattern. With this particular ECS GeForce GT 240 I've never got it working right with Nouveau across many different Kernel/DDX/Mesa releases while other Nouveau users have reported success with the GT 240. The proprietary NVIDIA Linux graphics driver works just fine with this ECS GeForce GT 240.

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. Fedora 21 Beta & Final Release Slip Further
  2. Mesa 10.3.2 Has A Couple Bug-Fixes
  3. RadeonSI/R600g HyperZ Support Gets Turned Back On
  4. openSUSE Factory & Tumbleweed Are Merging
  5. More Fedora Delays: Fedora 21 Beta Slips
  6. Mono Brings C# To The Unreal Engine 4
  7. Coreboot Now Has Support For Intel Broadwell Hardware
  8. Enlightenment's EFL 1.12 Alpha Has Evas GL-DRM Engine, OpenGL ES 1.1 Support
  9. GTK+ Lands Experimental Backend For Mir Display Server
  10. Ubuntu 14.10 Officially Released
Latest Forum Discussions
  1. HOPE: The Ease Of Python With The Speed Of C++
  2. Updated and Optimized Ubuntu Free Graphics Drivers
  3. Ubuntu 16.04 Might Be The Distribution's Last 32-Bit Release
  4. Linux hacker compares Solaris kernel code:
  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