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

A Newbie's Guide To RandR 1.2

Michael Larabel

Published on 26 November 2007
Written by Michael Larabel
Page 1 of 3 - 11 Comments

Recently there has been much talk about RandR 1.2 support with RadeonHD and Nouveau (among other drivers), and as a result we have been asked many times now "what is RandR, and why do I care?" Well, RandR is the "Resize and Rotate" extension in X.Org and the v1.2 update introduces new functionality such as dynamic hot-plugging support for display devices. To help those who may be new to Linux or just never took advantage of this X.Org technology, we have written a brief guide with some of the RandR basics.

As was mentioned in the introduction, RandR stands for Resize and Rotate. The RandR extension itself isn't new, with the original X Resize and Rotate Extension being drafted back in 2001, but RandR 1.2 had only premiered with X Server 1.3. Some of the common free software drivers that support RandR 1.2 include Nouveau, nv, xf86-video-ati, Avivo, and last but not least RadeonHD. Keith Packard does most of the RandR work, and the first open-source driver to support this updated extension was the open-source Intel driver. RandR 1.2 requires support from the X server as well as the driver supporting the extension specification, and then the system must have the Xrandr library.

While the most common way to control the RandR environment is through the xrandr CLI utility, there are several graphical-based programs for controlling RandR 1.2. One of the newest utilities to boast RandR 1.2 support is displayconfig-gtk from Ubuntu, while others include grandr (GTK+ interface), URandR (PyGTK interface), and in KDE 4.0 there will be support via KControl. If you are new to Linux or RandR usage, if you have a GUI utility available that would likely be your easiest solution. The usage in this guide is for those using the command-line xrandr utility.

Among the RandR features accessible through xrandr is for changing the resolution of the screen, rotating the screen, changing the DPI value and refresh rate of a monitor, and reflecting the screen over an axis. To the death of Xinerama, configuring all display devices and dynamically enabling or disabling them without restarting the X server can be done through xrandr / RandR 1.2. Aside from ensuring that the proper driver is loaded, you don't need to touch the xorg.conf when dealing with RandR nor should you need root access.

<< Previous Page
1
Latest Linux Hardware Reviews
  1. Intel Xeon E5-1680 v3 & E5-2687W v3 Compared To The Core i7 5960X On Linux
  2. Intel 120GB 530 Series SSD Linux Performance
  3. Btrfs/EXT4/XFS/F2FS RAID 0/1/5/6/10 Linux Benchmarks On Four SSDs
  4. AMD's Windows Catalyst Driver Remains Largely Faster Than Linux Drivers
Latest Linux Articles
  1. NVIDIA vs. Nouveau Drivers With Linux 3.18 + Mesa 10.4-devel
  2. Is The Open-Source NVIDIA Driver Fast Enough For Steam On Linux Gaming?
  3. Linux 3.18 File-System Performance Minimally Changed But Possible Regressions
  4. AMD Radeon Gallium3D Is Catching Up & Sometimes Beating Catalyst On Linux
Latest Linux News
  1. VirtualBox 4.3.20 Arrives, Still No Sign Of VirtualBox 4.4
  2. Scientific Linux 6.6 vs. Scientific Linux 7.0 Benchmarks
  3. Qualcomm Looks To Get Into The ARM Server Business
  4. HHVM 3.4 Adds New Features, Support
  5. More Radeon Driver Changes Queued For Linux 3.19
  6. Unigine 2.0 Alpha 2 Adds C# Support
  7. FFmpeg Is Returning To Ubuntu With 15.04 Release
  8. Linux Version Of Civilization: Beyond Earth Still Coming Along
  9. Yahoo To Become Default Search Provider For Firefox
  10. Better Fan Control Support Coming To The Open-Source Radeon Driver
Latest Forum Discussions
  1. Updated and Optimized Ubuntu Free Graphics Drivers
  2. Debian Init System Coupling Vote Results
  3. Debian Developer Resigns From The Systemd Maintainership Team
  4. Ubuntu Developers Still Thinking What To Do About Adobe Flash Support
  5. How to get rid of Linux
  6. how to configure module phoromatic ?
  7. Major Performance Breakthrough Discovered For Intel's Mesa Driver
  8. Script for Fan Speed Control