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 2 of 3 - 11 Comments

To start with the xrandr usage, simply enter xrandr (or xrandr -q) to see all available outputs and their current status.

Displayed are the different connectors (i.e. VGA-0, DVI-0, S-Video, LVDS) along with the automatically detected resolutions using the EDID information obtained from the display. The asterisk denotes the current resolution. Other bits of information are also displayed for connected displays. In the above example you can see the display was running via DVI at 1280 x 1024 with a refresh rate of 60Hz. For basic information regarding xrandr see man xrandr or xrandr --help.

When connecting a new display device to the graphics card with X already running, in many cases it's as easy as just entering: xrandr --auto. The auto command will attempt to enable all attached outputs. Connected displays are then treated as one large virtual screen. If there is an output you are looking to disable, such as the monitor connected to DVI-0, the syntax is: xrandr --output DVI-0 --off. If the display order does not align with your monitor configuration, you can change it in the using the --left-of or --right-of syntax: xrandr --output VGA --auto --right-of LVDS.

If xrandr defaults to an undesired resolution, it can be dynamically changed by entering xrandr --output DVI-0 --mode 0 for the first mode listed when running xrandr or xrandr -q. Alternatively, the desired resolution can instead be entered as the argument for mode. The refresh rate can be changed using the --rate argument.

Latest Linux Hardware Reviews
  1. A Walkthrough Of The New 32 System Open-Source Linux Benchmarking Test Farm
  2. Habey MITX-6771: Mini-ITX Board With Quad-Core J1900 Bay Trail
  3. OCZ Vector 150 SSD On Linux
  4. Noctua i4 CPU Cooler: Great For Cooling High-End LGA-2011v3 CPUs
Latest Linux Articles
  1. AMD Kaveri: Open-Source Radeon Gallium3D vs. Catalyst 14.12 Omega Driver
  2. 12-Way AMD Catalyst 14.12 vs. NVIDIA 346 Series Linux GPU Comparison
  3. AMD Catalyst 14.12 Omega Driver Brings Mixed Results For Linux Users
  4. 6-Way Winter 2014 Linux Distribution Comparison
Latest Linux News
  1. Adreno A4xx Rendering With Freedreno Takes Shape
  2. Linux 3.19-rc1 Kernel Released Ahead Of Schedule
  3. Civilization: Beyond Earth Linux GPU/Driver Benchmarks
  4. X.Org Server 1.16.3 Released To Fix Security Issues
  5. Linux 3.19 Merge Window Closes Ahead Of Schedule
  6. MIPS R6 Architecture Now Supported By GCC
  7. LowRISC To Feature Tagged Memory & Minion Cores
  8. Intel Skylake Audio Support For Linux 3.19
  9. After 10+ Years, NetworkManager Reaches v1.0
  10. VDPAU Updated To v0.9
Latest Forum Discussions
  1. Speeding up systemd networking service
  2. FPS capped on Linux (AMD fglrx drivers)
  3. Need some hand holding with upgrading xserver
  4. Are there an app using HSA ?
  5. The New SuperTuxKart Looks Better, But Can Cause GPU/Driver Problems
  6. XLennart: A Game For Systemd Haters With Nothing Better To Do
  7. Updated and Optimized Ubuntu Free Graphics Drivers
  8. Debian init discussion in Phoenix Wright format