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 Still Sorting Out Haswell On Linux

Intel

Published on 05 December 2012 02:42 AM EST
Written by Michael Larabel in Intel
6 Comments

Intel should finally have Haswell graphics support on Linux in shape with the Linux 3.8 kernel after earlier admitting they screwed up, not all areas of the open-source GPU driver support are polished ahead of the big Haswell CPU launch in 2013.

Based upon reports from my sources and public code commits, it seems that the Intel Haswell Linux enablement is mostly set. With the Linux 3.8 kernel and Mesa 9.1/10.0 along with the latest xf86-video-intel DDX, it seems mostly everything is set for the Intel Haswell launch next year -- the display output now is mostly in shape, 2D/3D acceleration is working reliably, and as of recently there is video acceleration support.

While the core areas of support are now in place for the much-improved graphics on Haswell processors, in other areas they are still cleaning and fixing up things. Of interest to many will be the power efficiency of Haswell as it's been talked up a lot by Intel, but this is one of the areas still being tackled under Linux.

New on the mailing list are patches to work out dynamic power well support on Haswell.
Daniel recently sent a patch to support disabling the power well, but when reviewing it I discovered that our code to enable/disable the power well - not part of Daniel's patch, only used by it - is broken. So I created a patch to fix this problem and then ported Daniel's patch to be on top of the fix.

With this, we are finally capable of correctly disabling/enabling the power well, but we are also uncovering a huge problem: we now get tons of "unclaimed register" errors, because we read/write the registers inside the "power down well" even when they're not being used.

I think we can try to apply patch 01 now, but before applying patch 02 we should probably try to get rid of all those "unclaimed register" messages that it brings. This will certainly not be a small task. I can volunteer myself to do this, but considering my TODO list I will certainly not be able to address this problem before January. The first step is certainly to avoid calling ivb_disable_plane: this alone will already remove most of the error messages.
Aside from sorting out the dynamic powering up and down of the power well, various other HSW-related patches have been floating around on the mailing list in recent days with the Linux 3.8 merge window opening up in the next week or so.

This will all hopefully be worked out before the Haswell launch in H1'2013, but for some Linux desktop users it may mean needing to pull in newer code than what may be shipping in their distribution of choice at the time of the Ivy Bridge successor's launch.

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. RadeonSI Gallium3D vs. Catalyst At 4K UHD On Linux
  2. MSAA RadeonSI Gallium3D Performance Preview
  3. Intel Core i7 5960X CPU Core Scaling Under Linux
  4. AMD RadeonSI Gallium3D Performance For 4K Linux Gaming
Latest Linux News
  1. Digia Qt Spinoff Is Called "The Qt Company"
  2. GNOME 3.14 Makes More Progress In Running Natively On Wayland
  3. Minix 3.3 Released With Cortex-A8 ARM Support, NetBSD Userland Compatibility
  4. More Intel DRM Changes Queued For Linux 3.18, Including Old i830M Fixes
  5. New Code Starts Lining Up For X.Org Server 1.17
  6. Rust Developers Planning For The Rust 1.0 Language
  7. RPM 4.12 Brings New Switches, New Rpm2Archive Utility
  8. Nouveau For Linux 3.18 Gains DP Audio, More Re-Clocking
  9. SUSE Gets Bought Out Again
  10. Enlightenment E19 Officially Released With Its Own Wayland Compositor
Latest Forum Discussions
  1. support for first generation UVD blocks (RV6xx, RS780, RS880 and RV790)
  2. Nvidia joins the ranks of Apple and Microsoft
  3. Updated and Optimized Ubuntu Free Graphics Drivers
  4. New Group Calls For Boycotting Systemd
  5. Hd 6850
  6. nv and xorg.conf under Debian PPC
  7. X.Org Is Looking For Some Female Help
  8. FSF Issues Their Rebuttal To Apple's New iPhone, Watch & Apple Pay