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

Kernel Mode-Setting Push For Linux 2.6.29 Kernel

Linux Kernel

Published on 29 December 2008 08:28 AM EST
Written by Michael Larabel in Linux Kernel
10 Comments

David Airlie has just called upon Linus Torvalds to pull the kernel mode-setting framework and Intel KMS driver support into the Linux 2.6.29 kernel. If you're a faithful Phoronix reader this shouldn't come as a surprise since Intel, Red Hat, and others have been busy hacking away at kernel mode-setting to get it ready to merge.

The core kernel mode-setting code will now be in the next mainline kernel release along with the Intel i915 KMS driver, but the kernel must be built with the CONFIG_DRM_I915_KMS option since KMS isn't yet enabled by default. It was just in the previous kernel release, the Linux 2.6.28 kernel, that the Graphics Execution Manager made its way upstream since GPU memory management within the kernel is a prerequisite for having mode-setting done also in the kernel.

Kernel mode-setting allows for faster VT switching, improved suspend-and-resume support, a flicker-free boot experience, eliminating the need for X to be banging on the hardware, and various other benefits. While KMS is finally entering the mainline Linux kernel, it's been shipping as a preview feature in Fedora since earlier this year (A Preview of KMS). Kernel mode-setting is also depended upon by Red Hat's Plymouth boot project as well as Wayland. For more on kernel mode-setting, checkout The State of Kernel Mode-Setting or our other articles.

All that will be supported by KMS in the 2.6.29 kernel is Intel hardware. ATI does have kernel mode-setting support, but it's not ready to be merged into the mainline kernel due to its dependence on the TTM memory manager rather than GEM. We previously talked about the GEM-ified TTM manager for the ATI driver, but a new version of TTM must come about or the Radeon memory management code be redesigned so that it can be pushed upstream. If this work can be accomplished in the next three months we could possibly see it in the Linux 2.6.30 kernel. Any NVIDIA kernel mode-setting support is still a ways out since the third-party Nouveau driver depends upon Translation Table Maps as well and there isn't even a stable 2D Nouveau driver out yet.

The mailing list message asking Linus to pull KMS and the i915 KMS driver into Linux 2.6.29 can be read on the DRI development list.

Latest Linux Hardware Reviews
  1. Overclocking The AMD AM1 Athlon & Sempron APUs
  2. AMD Athlon 5350 / 5150 & Sempron 3850 / 2650
  3. Upgraded Kernel & Mesa Yield A Big Boost For Athlon R3 Graphics
  4. AMD Athlon 5350 APU On Linux
Latest Linux Articles
  1. Are AMD Athlon/Sempron APUs Fast Enough For Steam On Linux?
  2. AMD Athlon's R3 Graphics: RadeonSI Gallium3D vs. Catalyst
  3. GCC 4.9 Compiler Optimization Benchmarks For Faster Binaries
  4. DDR3 Memory Scaling Performance With AMD's Athlon 5350
Latest Linux News
  1. Intel Broadwell GT3 Graphics Have Dual BSD Rings
  2. Early Linux 3.15 Benchmarks Of Intel Core i7 + Radeon
  3. Red Hat Releases Its RHEL 7 Release Candidate
  4. New Features Coming To Xubuntu 14.04 LTS
  5. NVIDIA Officially Releases CUDA 6
  6. Google Releases An AutoFDO Converter For Perf In LLVM
  7. Fedora 21 To Evaluate Remote Journal Logging, 64-bit ARM Emulation
  8. Star Citizen Will Be Coming To Linux
  9. Ubuntu 14.10 Convergence To Focus On Replacing Core Apps
  10. The Results Of Optimizing Radeon's VRAM Behavior
  11. Kernel Developers Discuss Improving Kernel Configurations
  12. Apple, LLVM Developers Figure Out Their 64-Bit ARM Approach
Latest Forum Discussions
  1. The GNOME Foundation Is Running Short On Money
  2. Linux Kernel Developers Fed Up With Ridiculous Bugs In Systemd
  3. Bye bye BSD, Hello Linux: A Sys Admin's Story
  4. New tool for undervolt/overclock AMD K8L and K10 processors
  5. How to enable opengl 3.3 on r9 270?
  6. R290x sound problems
  7. radeon-profile: tool for changing profiles and monitoring some GPU parameters
  8. Torvalds Is Unconvinced By LTO'ing A Linux Kernel