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. 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