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

Wayland Work Towards State Machine For Display Control

Wayland

Published on 24 February 2012 12:11 PM EST
Written by Michael Larabel in Wayland
Comment On This Article

Tiago Vignatti on Friday published initial code seeking comments regarding a state machine for display control on the Wayland Display Server.

While Wayland is nearing version 1.0, there's many items left to be addressed with this next-generation display server architecture. One of the big open items is handling of changing mode-setting and other display control settings, i.e. what RandR (the Resize and Rotate extension) is to X.Org. Tiago published some initial "RFC" code for Wayland that implements a state machine for display control.

What his state machine handles right now is backlight control and DPMS. DPMS, or Display Power Management Signalling, is what can allow the monitor to be shut-off after a period of inactivity. DPMS has been part of the VESA specification for nearly two decades.

His set of patches add about 200 lines of code to Wayland. In the end for the Wayland compositor it implements the state machine to allow moving from display on to display dim to display screensaver and then finally display off (DPMS). The state changes are based upon the time of user idleness. Right now this is being backed by just a single timer in Wayland.

Kristian Høgsberg, the founder of Wayland and fellow Intel engineer to Tiago, already responded that they've already been working on DPMS and backlight support for the Weston reference implementation, so they want to do that first. The approach they are doing with that implementation is slightly different from Vignatti's work.

For those interested in the Wayland state machine patch-set can be found on the project's mailing list.

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. Khronos Group Announces Vulkan, OpenCL 2.1, SPIR-V
  2. Samsung 850 EVO SSD Linux Benchmarks
  3. Kubuntu 15.04 Is Turning Out Quite Nice, Good Way To Try Out The Latest KDE
  4. 5-Way Linux Distribution Comparison On The Core i3 NUC
  5. OCZ ARC 100 Linux SSD Benchmarks
  6. Lenovo ThinkPad X1 Carbon Works Great As A Linux Ultrabook
Latest Linux News
  1. The Khronos Group's Vulkan, SPIR-V & OpenCL 2.1 Presentations
  2. Valve Developed An Intel Linux Vulkan GPU Driver
  3. Valve Starts Listing The Steam Machines In The Steam Store
  4. Ubuntu Will Start Booting With Systemd Next Monday
  5. A Brand New Linux Network Stack Proposed: Linux XIA
  6. Niche Drivers Get Ported To Atomic Mode-Setting For Linux 4.1
  7. openSUSE Tumbleweed Continues Ascending
  8. Open-Source SPIR-V Reader & Writer Written In Java
  9. LunarGLASS Adds Experimental SPIR-V Front-End
  10. The New Open-Source Linux Test Farm Is Almost Operational
Most Viewed News This Week
  1. Confirmed: Vulkan Is The Next-Gen Graphics API
  2. Xfce 4.12 Released After Nearly Three Years Of Work
  3. 8cc: A Small C11 Compiler
  4. Unreal Engine Made Free By Epic Games
  5. Canonical's Latest Demo Of Ubuntu Unity 8 Convergence In Action
  6. Mozilla Thunderbird Adoption Climbs, Thunderbird 38 In May
  7. VLC 2.2 "Weathermax" Brings Better VP9 & H.265 Support
  8. Features Coming For The Imminent Xfce 4.12 Release