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

Attention Turns To Open-Source Drivers & Firefox

Mozilla

Published on 17 January 2011 11:01 AM EST
Written by Michael Larabel in Mozilla
25 Comments

Last week we reported on Mozilla Firefox developers having issues with Linux GPU drivers to the point that the Firefox 4.0 Linux build will not have GPU acceleration enabled by default, but it can be found for Mac OS X and Windows users. Fortunately, to fix the situation, there's now some open-source Mesa/X developers looking into these problems of Firefox GPU acceleration.

Mozilla's Benoit Jacob wrote to the Mesa mailing list about the WebGL conformance tests to fix bugs in Mesa's OpenGL implementation. "The goal of this email is to discuss steps towards whitelisting Xorg OpenGL drivers for WebGL rendering, and more generally for all OpenGL-based features, in Firefox. Although I'm only directly concerned with Firefox, this really applies equally well to all browsers implementing WebGL."

Benoit notes that the only Linux graphics driver currently white-listed for support is NVIDIA's binary blob while the open-source drivers and even AMD's Catalyst Linux driver are black-listed from support due to bugs. (Note to those interested in wanting to try their black-listed drivers with Firefox 4.0, there's the MOZ_GLX_IGNORE_BLACKLIST environmental variable to bypass the support checks.)

In response to this message, David Airlie already responded. "Results: (5231 of 5344 passed, 3 timed out) This was with the latest Intel mesa driver on an Ironlake laptop. However I got a random crash on a previous run, I'm guessing if we can figure out the misc crasher we'd be in a lot better place."

Corbin Simpson, the student developer mostly known for his work on the ATI Gallium3D driver, has also been investigating the WebGL Firefox issues with the drivers more thoroughly. Here's what he said:
I already started working on this. (A friend just got hired by Moz and I owe him one.)

Basic analysis: The crash is in the Mesa-side DRI2 handler for flushing the frontbuffer. There's a segfault of very weird composition. The BT (which I can get if needed) goes back to glXMakeCurrent, and it looks like glXMakeCurrent is unbinding the current context, which is calling the DRI2 unbind callbacks, which calls frontbuffer flush, but part of the DRI2 context is screwy and we get a segfault.

There's a couple problems though. The frontbuffer flush usually isn't fatal; it only kills us about one in five times. Sometimes it dies on the very first test, sometimes it dies halfway through the suite. There's no rhyme or reason to it.

Ideally these open-source developers will be able to get the WebGL issues on Mesa straightened out quickly. However, it already would be too late to get them fixed and then white-listed for Firefox 4.0. Mesa 7.10.1 / Mesa 7.11 will likely not be out for a couple of months and if these next releases do carry the WebGL fixes, for most users it's then a matter of waiting for the distribution vendors to pick-up the new packages. Maybe in time for Mozilla Firefox 4.1 these Linux GPU acceleration issues will be sorted out.

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 980: The Best GPU For Linux Gamers
  2. ROCCAT LUA: A Linux-Friendly Gaming Mouse
  3. Cheetah Mounts: The Affordable Way To Put Your TV On The Wall
  4. Scythe Mugen MAX
Latest Linux Articles
  1. Preview: Radeon Gallium3D Performance For CS:GO On Linux
  2. XWayland Linux Gaming Performance With GNOME Wayland On Fedora 21
  3. EXT4/Btrfs/XFS/F2FS Benchmarks On Linux 3.17
  4. Fedora 21 Alpha First Impressions: It's Great
Latest Linux News
  1. Microsoft Announces... Windows 10 With A Start Menu
  2. Borderlands 2 Launches On Steam For Linux
  3. Debian Jessie Might Get Rid Of The kFreeBSD Port
  4. Fedora Might Try A New Scheduling Strategy For Its Releases
  5. AMD's Catalyst Working On A GLSL Shader Cache
  6. OpenMP 4.0 Offloading Is Closer For GCC 5
  7. Wayland Presentation Extension Added To Weston
  8. Intel Skylake Support Rolls Out To Mesa's DRM
  9. VA-API's Libva 1.4.0 Brings VP8 Encoding Support
  10. Operating System U Fails To Live Up To Its Goals
Latest Forum Discussions
  1. X.Org Women Outreach Program Only Turns Up Two Applicants So Far
  2. FSF Issues Statement On Shellshock Bash Vulnerability
  3. Advertisements On Phoronix
  4. NVIDIA Alerts Nouveau: They're Starting To Sign/Validate GPU Firmware Images
  5. New AMD Catalyst drivers out today
  6. Updated and Optimized Ubuntu Free Graphics Drivers
  7. Take the Steam Survey results with a grain of salt. It is flawed.
  8. AMD Wants To Know What's Wrong With Catalyst