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

Has AMD Finally Fixed Tearing With Its Linux Driver?

Michael Larabel

Published on 26 January 2011
Written by Michael Larabel
Page 1 of 1 - 73 Comments

AMD put out a rare beta Linux driver this Monday and they have now just announced the release of the Catalyst 11.1 driver as their stable monthly update for Linux and Windows users. With this Catalyst driver, there is though one interesting but hidden feature that is sure to please many ATI/AMD Radeon Linux desktop users.

While the Catalyst 11.1 driver only officially mentions Red Hat Enterprise Linux 6.0 production support and Red Hat Enterprise Linux 5.6 "early look" support as the changes, but there is more. Hidden away within this driver is finally the code that will hopefully eliminate screen tearing for the proprietary Radeon/FirePro Linux driver. This tear-free vsync support is currently considered a "work in progress" but can be enabled manually. This support is designed to ensure a tear-free experience throughout the entire desktop across the spectrum of 2D, 3D, and video applications.

To enable this support in the Catalyst 11.1 driver (and in future releases until it's officially acknowledged as a feature by AMD and enabled by default), it is just a matter of running aticonfig --set-pcs-u32=DDX,EnableTearFreeDesktop,1 followed by restarting the X.Org Server. If you enable the support and then hit any issues or wish to disable the tear-free capability for whatever reason, it's just a matter of issuing aticonfig --del-pcs-key=DDX,EnableTearFreeDesktop.

Using this tear-free desktop though does require extra video memory, so those with limited amounts of VRAM may be stuck without this support. This tear-free support is also specific only to the Catalyst driver. There's separate work going on within the open-source ATI driver stack for KMS page-flipping, swap buffer waits, and other vblank work in efforts to reduce screen tearing but at the cost of performance.

As AMD hasn't officially acknowledged this feature yet to this public of the tear-free desktop or the method of enabling/disabling the support, as always, stop by the Phoronix Forums if you run into any problems.

Other fixes found in today's driver release include fixing the kernel module build against the Linux 2.6.37 kernel, X segmentation faults under different scenarios, fixing up display hot-plugging on SuSE Linux Enterprise Desktop, and reducing the driver's build size by about 15MB. Yes, this driver should work with the recently released Linux 2.6.37 kernel.

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. Intel Broadwell: GCC 4.9 vs. LLVM Clang 3.5 Compiler Benchmarks
  2. Ubuntu vs. Fedora Linux On Lenovo's X1 Carbon With Core i7 Broadwell
  3. Ubuntu 15.04 Is The Easy Path To Better Performance On Intel Broadwell
  4. NVIDIA's Latest Maxwell Line-Up Against AMD With Catalyst On Linux
  5. Preliminary Tests Of Intel Sandy Bridge & Ivy Bridge vs. Broadwell
  6. AMD FX-8320E Performance On Linux
Latest Linux News
  1. Does VirtualBox VM Have Much A Future Left?
  2. HAMMER2 File-System Is Still Slowly Coming Together
  3. The Better Looking Window Decorations For GNOME 3.16
  4. Libinput 0.9 Adds Support For Hovering Fingers On Touchpads
  5. Free Software Foundation Endorses Another (Outdated) Laptop
  6. DNF Plugins Extend The Functionality Of Fedora's Yum Successor
  7. LibreOffice 4.4 Released With Better OOXML Support, UI Improvements
  8. Inkscape 0.91 Goes Through C++ Code Conversion, New Cairo Rendering, OpenMP Filters
  9. New Mesa Patch To Improve CPU-Bound Applications
  10. LLVM Adds Options To Do Fuzz Testing
Most Viewed News This Week
  1. PlayStation 4 System Compiler Support Landing In LLVM
  2. LibreOffice 4.4 Is Coming Soon With New Features
  3. Linux "GHOST" Vulnerability Hits Glibc Systems
  4. My Initial Intel Broadwell Linux Experience With The ThinkPad X1 Carbon
  5. Broadwell Linux Ultrabook Running MUCH Cooler Than Haswell
  6. LZHAM 1.0 Lossless Data Compression Codec Released
  7. Linux Users Upset By Chromium's Busted HiDPI Support
  8. Vivaldi: A New Chromium-Powered, Multi-Platform Browser