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

X.Org 7.4 To Lose DRI2 Support

X.Org

Published on 04 August 2008 08:15 PM EDT
Written by Michael Larabel in X.Org
38 Comments

It's six months late and X.Org 7.4 still hasn't shipped as its being held up on the release of Mesa 7.1. Hopefully though we'll see the release of Mesa 7.1, X.Org 7.4, and the X Server 1.5 in the very near future. However, there has been some last minute bloodshed before this first major X Server release in nearly a year. It appears that DRI2, which was first proposed back at 2007 X Developers' Summit, will be dropped from the X Server 1.5 series.

The design of DRI2, or the Direct Rendering Infrastructure 2, was a modest improvement over DRI (DRI2 design page) and noticeably to end-users it allows (accelerated) direct rendering to redirected windows. This becomes noticeable (or there the lack of) when using a compositing manager (Compiz) and watching a video or running an OpenGL application. DRI2 though has been dropped from the X Server 1.5 series due to its dependence on the TTM memory manager.

With Intel having jumped ship on TTM earlier this year and X developers complaining about TTM, the days of this hyped kernel memory manager from Tungsten Graphics look limited. Intel threw all of their weight into developing the Graphics Execution Manager as a new kernel memory manager. Some have been concerned about the GEM API being designed solely around Intel's needs, but it looks like it will be merged into the Linux kernel and will become the memory manager for new graphics driver work.

This abandoning of the TTM memory manager in favor of GEM has caused some problems for the Direct Rendering Infrastructure 2. DRI2 was designed around the TTM API and supporting this memory management API is a prerequisite for drivers supporting this infrastructure. As a result, DRI2 -- to some extent -- is forced back to the design table.

The DRI2 mastermind, Kristian Høgsberg, has announced on the X.Org mailing list that some of the DRI2 design decisions now need to be re-evaluated when switching from TTM to GEM. As a result, the current DRI2 code will be stripped away from the X Server 1.5 branch. We've been in a feature freeze for X Server 1.5 and this redesign work will take some time, so there's no hope in seeing a patched up DRI2 before X.Org 7.4 ships.

Input Hotness was already pushed back from X Server 1.5 as well as Multi-Pointer X (MPX). DRI2 is now the latest feature to enter the X Server 1.6 party. Also on the table for 1.6 is Distributed Multi-head X (DMX) and RandR 1.3. X Server 1.6 will ship with X.Org 7.5 sometime in 2009.

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. Rosewill RS-MI-01: An Ultra Low-Cost Mini-ITX Chassis
  2. D-Link DCS-2330L HD Wireless Network Camera
  3. Gigabyte AM1M-S2H
  4. AMD's New Athlon/Semprons Give Old Phenom CPUs A Big Run For The Money
Latest Linux Articles
  1. AMD Catalyst 14.4 Brings Few Linux Performance Improvements
  2. The Performance Of Fedora 20 Updated
  3. Clang Fights GCC On AMD's Athlon AM1 APU With Jaguar Cores
  4. Ubuntu 14.04 LTS vs. Oracle Linux vs. CentOS vs. openSUSE
Latest Linux News
  1. Valve Is Bringing VOGL To Windows & Working On Regression Tests
  2. Canonical Is Taking Over Linux 3.13 Kernel Maintenance
  3. Google Web Designer Is Now Natively Available On Linux
  4. Ubuntu 14.10 Is Codenamed The Utopic Unicorn
  5. Audacious 3.5 Lightweight Audio Player Released
  6. Steam Updated For Ubuntu 14.04 LTS, SteamOS
  7. DNF 0.5 Yum Replacement Now Supports Groups
  8. Red Hat Enterprise Linux 7.0 Is Looking Fantastic
  9. Intel Is Launching An Interesting Bay Trail NUC Next Week
  10. Another X.Org EVoC Proposed For OpenGL 4+ Tests
  11. The Best Features Coming With Qt 5.3
  12. Red Hat's RHEL7 RC ISO Is Now Publicly Available
Latest Forum Discussions
  1. The Most Amazing OpenGL Tech Demo In 64kb
  2. Announcing radeontop, a tool for viewing the GPU usage
  3. HTPC-upgrade advice: AMD Richland A8-7600 or Kaveri A10-6700T ???
  4. New card. Open source drivers only.
  5. The GNOME Foundation Is Running Short On Money
  6. Linux Kernel Developers Fed Up With Ridiculous Bugs In Systemd
  7. Script for Fan Speed Control
  8. Torvalds Is Unconvinced By LTO'ing A Linux Kernel