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

Canonical To Not Enable UXA, Too Problematic

Ubuntu

Published on 26 March 2009 07:20 PM EDT
Written by Michael Larabel in Ubuntu
14 Comments

In August of last year Intel had introduced the UMA Acceleration Architecture (commonly referred to as UXA). UXA is based upon the very common EXA acceleration API but it handles the pixmap management using GEM objects. With its use of the Graphics Execution Manager it's more optimal as more open-source graphics drivers turn to kernel memory management.

Our UXA benchmarks have shown that this interface is significantly faster than EXA, but it's not yet free of bugs. Those using UXA are frequently prone to graphical corruption, X Server crashes, and other problems. The UMA Acceleration Architecture has been around for a number of months now, but the situation isn't better yet.

Bryce Harrington, the lead X.Org engineer at Canonical, has decided these performance improvements do not outweigh Intel's UXA bugs and as a result it will not be enabled by default in Ubuntu 9.04. Bryce shares that some Ubuntu users are able to use UXA without any problems, while others with the same Intel IGPs report serious regressions. He hopes, however, to enable UXA by default on Intel hardware in Ubuntu 9.10. Those not wishing to use EXA on Intel hardware still can change the acceleration type to UXA from their xorg.conf.

More on the Ubuntu decisions about Intel UXA can be found on the Ubuntu-X mailing list and on the UxaTesting Wiki. Originally UXA was supposed to be merged back into EXA once the Intel open-source engineers decided how to deal with kernel memory management and 2D acceleration, but we found out earlier this year that Intel doesn't intend to eliminate UXA.

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. AMD R600g/RadeonSI Performance On Linux 3.16 With Mesa 10.3-devel
  2. Intel Pentium G3258 On Linux
  3. SilverStone Precision PS10
  4. ASRock Z97 Extreme6
Latest Linux Articles
  1. Nouveau vs. Radeon vs. Intel Tests On Linux 3.16, Mesa 10.3-devel
  2. KVM Benchmarks On Ubuntu 14.10
  3. X.Org Server 1.16 Officially Released With Terrific Features
  4. Ubuntu With Linux 3.16 Smashes OS X 10.9.4 On The MacBook Air
Latest Linux News
  1. FreeBSD Developing A New Automounter, Other Features
  2. Guix 0.7 Can Now Install The GNU Operating System
  3. X.Org Foundation Still Works Towards Becoming An SPI Project
  4. Open-Source AMD Hawaii Support Should Now Be Working!
  5. KDE Developers Continue Working Toward Wayland Support
  6. Ubuntu 14.04.1 LTS Released
  7. Linux Developers Jump Quickly On ACPI 5.1, Helps Out ARM
  8. Pkg 1.3.0 Released To Improve Package Management On FreeBSD
  9. GOG.com Officially Starts Rolling Out Linux Games
  10. Fedora 21 Has Been Delayed By Three Weeks
Latest Forum Discussions
  1. Updated and Optimized Ubuntu Free Graphics Drivers
  2. AMD "Hawaii" Open-Source GPU Acceleration Still Not Working Right
  3. Radeon related kernel bug??
  4. how the US intellegentia operates:
  5. AMD Publishes Open-Source Linux HSA Kernel Driver
  6. Next-Gen OpenGL To Be Announced Next Month
  7. Open-Source Radeon Performance Boosted By Linux 3.16
  8. Remote gui not accessible in Phoronix Test Suite 5.2