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 Benchmarking Platform
Phoromatic Test Orchestration

Provider Object Support For RandR 1.5

X.Org

Published on 10 June 2012 07:00 AM EDT
Written by Michael Larabel in X.Org
4 Comments

The latest work by David Airlie for improving the X.Org infrastructure to handle modern GPU features (e.g. multi-GPUs, Optimus-like capabilities, etc) comes in the form of a proposed RandR protocol update.

Aside from David's DDX driver API re-work and other API/ABI breakage to the xorg-server, David's updating the Resize and Rotate extension to the X.Org Server. He's ultimately hoping to have DRI2 offload slaves and output slaves by this September with X.Org Server 1.13.

His proposed RandR update is to add the concept of "provider objects" to this popular X extension. As said by his mailing list message, "A provider object represents a GPU or virtual device that provides rendering or output services to the X server. This is the first rev of a protocol to enumerate providers devices, set their roles, and provide generic properties based on output properties for them."

This provider object work would form RandR 1.5. Here's some additional details about why you might be interested in provider objects with RandR 1.5:
1.5 Introduction to version 1.5 of the extension

Version 1.5 adds a new object called a provider object. A provider object represents a GPU or virtual device providing services to the X server. Providers have a set of abilities and a set of possible roles.

Provider objects are used to control multi-GPU systems. Provider roles can be dynamically configured to provide support for:

1) Output slaving: plug in a USB device, but have its output rendered using the main GPU. On some dual-GPU laptops, the second GPU isn't connected to the LVDS panel, so we need to use the first GPU as an output slave for the second GPU.

2) DRI2 offload - For dual-GPU laptops, allow DRI2 applications to be run on the second GPU and display on the first GPU.

3) GPU switching - Allow switching between two GPUs as the main screen renderer.

4) multiple GPU rendering - This replaces Xinerama.
At this time there's no other planned features to RandR 1.5.

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 News
  1. Fedora 22 Is Being Released Next Tuesday
  2. OpenWRT 15.05 Preparing Improved Security & Better Networking
  3. Using The New LLVM/Clang OpenMP Support
  4. Zapcc Claims To Be A "Much Faster C++ Compiler"
  5. Godot 1.1 Engine Release Brings New 2D Engine
  6. Intel VA-API Driver 1.6 Is Coming
  7. Canonical Is Reportedly Considering An IPO
  8. GNOME 3.18 - GTK3 Now Supports RandR 1.5
  9. Fedora 22 Risks Being Delayed Beyond Next Week
  10. Systemd 220 Has Finally Been Released
  11. LibreOffice 5.0 Beta 1 Released
  12. Allwinner Publishes New CedarX Open-Source Code
Latest Articles & Reviews
  1. Btrfs RAID 0/1 Benchmarks On The Linux 4.1 Kernel
  2. The State Of Various Firefox Features
  3. Intel Iris Graphics Performance With Mesa 10.6
  4. Fedora Workstation 22 Is Looking Great, Running Fantastic
Most Viewed News This Week
  1. The Linux 4.0 Kernel Currently Has An EXT4 Corruption Issue
  2. AMDGPU Open-Source Driver Code Continues Maturing
  3. Oculus Rift Suspends Linux Development To Focus On Windows
  4. Microsoft Open-Sources The Windows Communication Foundation
  5. LibreOffice 5.0 Open-Source Office Suite Has Been Branched
  6. Another HTTPS Vulnerability Rattles The Internet
  7. Wayland / Weston 1.8 Release Candidate Arrives
  8. Linux 4.1-rc4 Kernel Arrives A Day Late