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

Features Still Being Sought By Open-Source AMD Users

AMD

Published on 14 August 2013 08:45 AM EDT
Written by Michael Larabel in AMD
86 Comments

While the open-source AMD Radeon Linux graphics driver now has support for the latest graphics cards, there's finally UVD video decoding, and the Linux 3.11 kernel brings dynamic power management, there's still features being desired by those using this open-source Linux graphics driver on ATI/AMD GPUs.

In response to AMD's Initial Radeon Driver Changes For Linux 3.12 article, Phoronix readers began talking about other changes and features they are still seeking. The discussion has taken place within this forum thread for those interested. Below is a synopsis of what's going on.

- OpenGL performance. As I am quick to mention in many Phoronix articles, the open-source Radeon Linux graphics driver still doesn't have performance parity with the closed-source Catalyst driver. For those wondering about the current figures see AMD Gallium3D & Catalyst Drivers Compete Against Windows and AMD Radeon, NVIDIA GeForce Linux Comparison For July 2013. The open-source Radeon performance is likely to improve with time, but there's unlikely to be any breakthrough OpenGL performance improvements in the near-term and likely just the gradual evolution of the Radeon Gallium3D drivers.

- CrossFire support, AMD's solution for shared multi-GPU rendering and is common among Windows gamers. AMD's competition to NVIDIA SLI isn't supported by their open-source driver and only with Catalyst. AMD's Alex Deucher responded in the aforelinked thread, "There isn't really any magic to crossfire. You just have split work between two gpus in the 3D driver. If anyone is interested, they could start playing with it. Support for the crossfire connectors are just an optimization and are not required for an implementation; in fact a number of crossfire scenarios don't use them at all." Basically, any skilled developer could theoretically work on open-source CrossFire without being held up on AMD documentation or code, but no one has actively pursued this feature. With AMD's scarce open-source resources, don't expect them to get to this soon considering the rather small proportion of AMD CrossFire Linux users.

- HDMI audio support is still being worked on. Radeon KMS HDMI audio is disabled by default and requires a kernel command-line parameter module to be set, but that may change soon. Radeon HDMI audio also isn't yet committed for newer classes of GPUs (e.g. Radeon HD 7000) at this time. For this audio support, it's mostly coming through reverse-engineering as opposed to official AMD documentation.

- Overclock and underclock support for AMD GPUs with the open-source driver, considering the Catalyst driver on Windows and Linux offers this functionality.

- Support for newer versions of OpenGL, which is a long and drawn out process for Mesa/Gallium3D.

- OpenCL/GPGPU is still being matured and isn't yet fully ready for end-users.

- A graphical interface for controlling different driver settings and features, similar to AMD's AMDCCCLE (Catalyst Control Center) or the NVIDIA Settings Panel (nvidia-settings). However, none of the open-source Linux GPU drivers have really been working on a unified control panel outside of driconf, the various RandR utilities, and other random projects.

What else would you like to see out of the Radeon Linux driver (or open-source GPU drivers in general)? Let us know in the forums.

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. NVIDIA GeForce GTX 970 Offers Great Linux Performance
  2. CompuLab Intense-PC2: An Excellent, Fanless, Mini PC Powered By Intel's i7 Haswell
  3. From The Atom 330 To Haswell ULT: Intel Linux Performance Benchmarks
  4. AMD Radeon R9 285 Tonga Performance On Linux
Latest Linux Articles
  1. 6-Way Ubuntu 14.10 Linux Desktop Benchmarks
  2. Ubuntu 14.10 XMir System Compositor Benchmarks
  3. Btrfs RAID HDD Testing On Ubuntu Linux 14.10
  4. Ubuntu 14.10 Linux 32-bit vs. 64-bit Performance
Latest Linux News
  1. Mono Brings C# To The Unreal Engine 4
  2. Coreboot Now Has Support For Intel Broadwell Hardware
  3. Enlightenment's EFL 1.12 Alpha Has Evas GL-DRM Engine, OpenGL ES 1.1 Support
  4. GTK+ Lands Experimental Backend For Mir Display Server
  5. Ubuntu 14.10 Officially Released
  6. Mesa 10.4 Might Re-Enable HyperZ For R600g/RadeonSI
  7. Intel GVT-g GPU Virtualization Moves Closer
  8. GTK+ 3.16 To Bring Several New Features
  9. Debian 8.0 Jessie Has Many Multimedia Improvements
  10. What Linux Benchmarks Would You Like To See Next?
Latest Forum Discussions
  1. Linux hacker compares Solaris kernel code:
  2. HOPE: The Ease Of Python With The Speed Of C++
  3. Advertisements On Phoronix
  4. Updated and Optimized Ubuntu Free Graphics Drivers
  5. Users/Developers Threatening Fork Of Debian GNU/Linux
  6. Ubuntu 16.04 Might Be The Distribution's Last 32-Bit Release
  7. AMD Releases UVD Video Decode Support For R600 GPUs
  8. Proof that strlcpy is un-needed