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

LM_Sensors Finally Gets Better Intel CPU Support

Intel

Published on 17 May 2010 08:11 AM EDT
Written by Michael Larabel in Intel
9 Comments

While the Linux hardware compatibility of modern processors and motherboards have normally been spot-on, as talked about in our many reviews, one of the areas that still causes annoyances with modern hardware can be the hardware sensors support. For motherboards this commonly means being able to monitor sensors for the temperatures, fan speeds, voltages. For the CPUs, their integrated temperature sensor(s) also aren't commonly supported on just-released Intel and AMD products.

For those with newer Intel CPUs, there is good news as new patches have been posted over the night that enable the LM_Sensors coretemp kernel module to support more modern chips. The newest Intel Core 2 Duo and Core 2 Quad CPUs along with those from the Nehalem and Westmere families have been tested with this code. The Atom N270 has also been tested, but unfortunately its value is currently off.

The first published patch removes the conditional checks for seeing if a thermal sensor can be found on the die of processors such as the Pentium M, Core 2 Duo 65nm, Core 2 Solo 65nm, Penryn, Nehalem, and Lynnfield. Instead the driver now checks a CPUID instruction (CPUID.06H.EAX[0]) to determine if thermal sensors are available. This should hopefully make the driver more forward-compatible with new Intel processors in the future. Another published patch now reads the TjMax value from the CPU itself via an MSR.

This Intel Linux sensor work was done by Intel's Huaxu Wan and Carsten Emde of the Open-Source Automation Development Lab eG. The patches can be found on the LM_Sensors mailing list.

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. Calamares 1.0 Distribution-Independent Installer Framework Released
  2. Librem 15 Linux Laptop Set To Close At Around $400k USD
  3. Virtual GEM To Increase Mesa's Software Rasterizer Performance
  4. Open Lunchbox: Yet Another Open-Source Laptop Attempt
  5. Wayland/Weston 1.7 Release Candidate
  6. Bugzilla 5.0 Is Coming Soon With New Features
  7. Linux Benchmarking... Even Faster & A Very Interesting February
  8. Does VirtualBox VM Have Much A Future Left?
  9. HAMMER2 File-System Is Still Slowly Coming Together
  10. The Better Looking Window Decorations For GNOME 3.16
Most Viewed News This Week
  1. PlayStation 4 System Compiler Support Landing In LLVM
  2. Linux "GHOST" Vulnerability Hits Glibc Systems
  3. LibreOffice 4.4 Is Coming Soon With New Features
  4. Broadwell Linux Ultrabook Running MUCH Cooler Than Haswell
  5. LZHAM 1.0 Lossless Data Compression Codec Released
  6. LLVM Adds Options To Do Fuzz Testing
  7. Vivaldi: A New Chromium-Powered, Multi-Platform Browser
  8. LibreOffice 4.4 Released With Better OOXML Support, UI Improvements