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 Linux Hardware Reviews
  1. Acer B286HK: A 28-inch UHD LED 4K Monitor For As Low As $350
  2. Intel Xeon E5-1680 v3 & E5-2687W v3 Compared To The Core i7 5960X On Linux
  3. Intel 120GB 530 Series SSD Linux Performance
  4. Btrfs/EXT4/XFS/F2FS RAID 0/1/5/6/10 Linux Benchmarks On Four SSDs
Latest Linux Articles
  1. Mesa Git Yields Performance Improvements For Newer AMD GPUs
  2. Apple OS X 10.10 vs. Ubuntu 14.10 Performance
  3. Mesa 10.5-devel Brings Some Intel Haswell HD Graphics Changes Over Mesa 10.3
  4. NVIDIA vs. Nouveau Drivers With Linux 3.18 + Mesa 10.4-devel
Latest Linux News
  1. Jolla Tablet Could Have Upgrades For MicroSDHC, Split Screen, 3.5G
  2. Intel Has Last Round Of DRM Changes For Linux 3.19, Starts Dropping DRI1/UMS
  3. Fedora 21 Release Candidate 1 Awaits Your Testing
  4. GCC 5 Adds Support For ARM's Cortex-A17
  5. KWayland Server Component Coming For KDE Plasma 5.2
  6. NVIDIA Posts Tegra Gallium3D Patch For K1+ Support
  7. Ubuntu 14.10 MacBook Air Tests With Linux 3.18, Mesa 10.5
  8. AMD Richland APU Support Added To Coreboot
  9. 2014 Holiday Shopping Reminder, Happy Thanksgiving
  10. Python 3 Support Added To The GNOME Shell
Latest Forum Discussions
  1. Updated and Optimized Ubuntu Free Graphics Drivers
  2. Hurrican SDL Port
  3. Roadmap to Catalyst 14.10 ?
  4. how to configure module phoromatic ?
  5. PulseAudio 6.0 Is Coming & Other Linux Audio Plans For The Future
  6. Debian Developer Resigns From The Systemd Maintainership Team
  7. Cant get working Kaveri APU - A10-7850k
  8. Script for Fan Speed Control