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

With KMS, Now Run Two X Servers Off One GPU

X.Org

Published on 17 March 2010 10:59 PM EDT
Written by Michael Larabel in X.Org
12 Comments

Over the past several weeks there have been a number of new Linux graphics features introduced by David Airlie, a Red Hat employee and long-time X.Org contributer. Last month David began on a project rampage by bringing hybrid graphics to Linux via code he called "vga_switcheroo" to switch between ATI/NVIDIA/Intel GPUs without rebooting the system (though restarting the X.Org Server is needed at this time) that that code has now made its way into the mainline Linux kernel. Last week another David Airlie project was multi-GPU rendering support for Linux that was written as a proof of concept to show a second GPU could render 3D applications onto the screen of the first GPU, regardless of the hardware vendor. This week we now have the ability to run two X.Org Servers for a multi-head setup off a single graphics card.

This code that allows two X.Org Servers to run off one graphics card is still very much a prototype like the multi-GPU rendering support, but it's working for David and patches are available. The patches go against libdrm and the Linux kernel and depend upon the graphics hardware driver using kernel mode-setting (KMS) for all of this to work out. In essence you can now easily have a two seat setup off one graphics card thanks to these DRM mapping changes and the introduction of render device nodes.

There's still a few items left on Airlie's to-do list for this feature and he's hoping someone else will pickup the work so he can move onto prototyping his next feature, but those interested can read about it on his blog.

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 Articles & Reviews
  1. Linux Compiler Benchmarks Of LLVM Clang 3.5 vs. LLVM Clang 3.6-rc1
  2. Intel Broadwell HD Graphics 5500: Windows 8.1 vs. Linux
  3. Linux Benchmarks Of NVIDIA's Early 2015 GeForce Line-Up
  4. NVIDIA GeForce GTX 960: A Great $200 GPU For Linux Gamers
  5. Disk Encryption Tests On Fedora 21
  6. Xonotic 0.8 Performance With The Open-Source AMD/NVIDIA Gallium3D Drivers
Latest Linux News
  1. Ubuntu's Mir Gains Server-Side Platform Probing
  2. Broadwell Linux Ultrabook Running MUCH Cooler Than Haswell
  3. LZHAM 1.0 Lossless Data Compression Codec Released
  4. LibreOffice 4.4 Is Coming Soon With New Features
  5. Linux Users Upset By Chromium's Busted HiDPI Support
  6. BPF Backend Merged Into LLVM To Make Use Of New Kernel Functionality
  7. Dying Light Is Headed To Linux, SteamOS
  8. Wayland 1.6.1 & Weston 1.6.1 Released
  9. Mesa 10.4.3 Brings A Bunch Of Fixes For The Direct3D "Nine" Support
  10. Intel Has A Few More Graphics Changes For The Linux 3.20 Kernel
Most Viewed News This Week
  1. Windows 10 To Be A Free Upgrade: What Linux Users Need To Know
  2. CoreOS Moves From Btrfs To EXT4 + OverlayFS
  3. Google Admin Encourages Trying Btrfs, Not ZFS On Linux
  4. TraceFS: The Newest Linux File-System
  5. My Initial Intel Broadwell Linux Experience With The ThinkPad X1 Carbon
  6. Mozilla's Servo Still On Track For 2015 Alpha Release
  7. Fedora 23 Likely To Pursue Wayland By Default
  8. Keith Packard Leaves Intel's Linux Graphics Work