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

Intel UMS Support To Be Eliminated In Linux 3.16 Kernel

Intel

Published on 31 March 2014 02:00 PM EDT
Written by Michael Larabel in Intel
4 Comments

For those Intel owners -- namely those with vintage Intel hardware -- the days of using user-space mode-setting (UMS) for the open-source Linux graphics driver are running out.

With the Linux 3.14 kernel that was released over the night, Intel UMS support was deprecated. Intel hasn't maintained their user-space mode-setting support on Linux in about a half-decade with pushing everything these days through kernel-based mode-setting. The Radeon and Nouveau drivers have also become completely dependent upon kernel mode-setting too, with user-space mode-setting these days mostly being left to really old X.Org drivers without a DRM/KMS module. Modern Linux distributions are also beginning to drop support for these old GPUs.

At first there were some performance issues in the Intel KMS code-paths, bugs, and other issues, but those early KMS issues have been worked out for years. Nearly all Intel Linux users are much better off with the KMS code-paths and that's even the only option for recent generations of Intel HD Graphics. However, there's still some very old Intel Linux users out there sticking to UMS. These users are mostly running old Intel 8xx or 9xx series chipsets where sometimes the BIOS goes awry with the Intel KMS driver or there's other system issues if trying to use this new driver, mostly around stability problems.

Intel UMS Support To Be Eliminated In Linux 3.16 Kernel


If you are trying to run Linux on an old Intel i8xx/9xx chipset, you're best off using a few-year-old Linux distribution as the user-space mode-setting code-paths have been completely unmaintained for some time and Intel developers really aren't concerned about this ancient hardware... Heck, it's rare these days to see even Ironlake or Sandy Bridge improvements with the developers now mostly being occupied by Haswell, Broadwell, Bay Trail, and Cherryview.

The next step now that the Linux 3.14 kernel is out there with the deprecated UMS support, Intel's open-source developers are talking of marking the UMS support as "BROKEN" and then dropping the UMS support completely with the Linux 3.16 kernel, per this intel-gfx list post.

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. GLAMOR + RadeonSI 2D Acceleration Is Quite Good For Open-Source AMD 2D Performance
  2. AMD Radeon R9 290 OpenGL On Ubuntu 15.04: Catalyst vs. RadeonSI Gallium3D
  3. Ubuntu 15.04 Offers Faster OpenGL For AMD Radeon GPUs On Open-Source
  4. Ubuntu 15.04 Brings Some Graphics Performance Improvements For Intel Haswell
  5. Sub-$20 802.11n USB WiFi Adapter That's Linux Friendly
  6. The Lenovo T450s Is Working Beautifully With Linux
Latest Linux News
  1. A Lot Of Improvements Are Coming For Mir 0.13, Including Work Towards Libinput
  2. Mobile Optimizations Coming For Phoronix
  3. Wayland 1.8 Alpha Release Delayed
  4. Godot Game Engine 1.1 Up To RC State
  5. ATI Rage128 Driver Now Has RandR Support
  6. Microsoft's Visual C++ Team Is Improving Clang For Windows
  7. Kodi 15.0 Beta 1 Released
  8. Lucid Sleep Support Is Being Worked On For The Upstream Linux Kernel
  9. Improvements On The Way For GNOME's Nautilus File Manager
  10. Wine 1.7.42 Implements More Of Direct2D
Most Viewed News This Week
  1. It Doesn't Look Like KDBUS Will Make It For Linux 4.1
  2. Trying Out Microsoft Visual Studio Code On Linux
  3. The Many Features Of The Linux 4.1 Kernel
  4. Microsoft Releases New Code IDE For Linux!
  5. Linux 4.1-rc1 Kernel Released, Packs In Several New Features
  6. GCC 4.9.2 vs. GCC 5 Benchmarks On An Intel Xeon Haswell
  7. QEMU 2.3 Officially Released
  8. Debian 9.0 Is Codenamed Stretch