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

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 Linux Hardware Reviews
  1. Scythe Mugen MAX
  2. Intel Core i7 5960X Haswell-E On Linux
  3. Intel 80GB 530 Series M.2 SSD On Linux
  4. With A New Motherboard, The Core i7 5960X Haswell-E Lights Up
Latest Linux Articles
  1. A Tour Of The New Phoronix Office
  2. 7-Way Linux Desktop Gaming Comparison On Ubuntu 14.10
  3. Intel P-State vs. CPUFreq Benchmarks On The i7-5960X
  4. RadeonSI GLAMOR Benchmarks With X.Org Server 1.16
Latest Linux News
  1. X.Org Server 1.16.1 Released
  2. Mesa Gets Closer To Having OpenGL 4.0 Tessellation Support
  3. Uselessd: A Stripped Down Version Of Systemd
  4. F2FS Tools Gain FSCK Support
  5. FreeBSD 10.1 Has The New VT Driver, Hardware Improvements
  6. AntiMicro 2.6 Yields Greater Compatibility For Gamepads On Linux
  7. OpenGL 3.3 / GLSL 3.30 Lands For Intel Sandy Bridge On Mesa
  8. AMD's RadeonSI Gallium3D Driver Sees Some Improvements
  9. Mesa 10.3 Released With The Latest Open-Source GPU Driver Improvements
  10. GNOME 3.13.92 Officially Released
Latest Forum Discussions
  1. ASRock AM1H-ITX: One Of The Best AM1 Mini-ITX Motherboards
  2. Wasteland 2 Officially Launched Today, Including For Linux Gamers
  3. Can Linux kill a motherboard?
  4. X.Org Women Outreach Program Only Turns Up Two Applicants So Far
  5. New stress testing utility for GPU's
  6. Stop grabbing my keyboard :(
  7. New Group Calls For Boycotting Systemd
  8. SSD seems slow