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

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. Ubuntu 15.04 Offers Faster OpenGL For AMD Radeon GPUs On Open-Source
  2. Ubuntu 15.04 Brings Some Graphics Performance Improvements For Intel Haswell
  3. Sub-$20 802.11n USB WiFi Adapter That's Linux Friendly
  4. The Lenovo T450s Is Working Beautifully With Linux
  5. Linux 4.0 SSD EXT4 / Btrfs / XFS / F2FS Benchmarks
  6. Linux 4.0 Hard Drive Comparison With Six File-Systems
Latest Linux News
  1. Intel Bay Trail & Cherry Trail CPUs To Run Faster With Linux 4.1
  2. Debian 8.0 Jessie Released
  3. New Phoronix.com Web Server
  4. GCC 5.2 Will Come In Two To Three Months
  5. AMD FP3 Motherboard Ported To Coreboot
  6. The Difference In Optimizations Between NIR & GLSL
  7. OpenMandriva Lx 3 Alpha: Adds UEFI Support, Defaults To LXQt
  8. Systemd Kills Off Shutdownd
  9. There's Now More Than 1,100 Games On Steam For Linux
  10. Btrfs In Linux 4.1 Has Fixes For File-Systems Of 20 Terabytes & Up
Most Viewed News This Week
  1. AMD Releases New "AMDGPU" Linux Kernel Driver & Mesa Support
  2. Ubuntu's Desktop-Next Switching From .DEBs To Snappy
  3. My Favorite Computer Desk Of The Past Decade For Less Than $100
  4. AMD Open-Sources "Addrlib" From Catalyst
  5. Library Operating System (LibOS) For Linux Still Being Pursued
  6. Debian 8.0 Jessie Is Ready For Release This Weekend
  7. GIMP's Porting To GTK3 Continues
  8. Features Thus Far For The Linux 4.1 Kernel