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 Linux Hardware Reviews
  1. CompuLab Intense-PC2: An Excellent, Fanless, Mini PC Powered By Intel's i7 Haswell
  2. From The Atom 330 To Haswell ULT: Intel Linux Performance Benchmarks
  3. AMD Radeon R9 285 Tonga Performance On Linux
  4. Apotop Wi-Copy
Latest Linux Articles
  1. AMD Moves Forward With Unified Linux Driver Strategy, New Kernel Driver
  2. MSI: Update Your BIOS From The Linux Desktop
  3. NVIDIA vs. AMD 2D Linux Drivers: Catalyst Is Getting Quite Good At 2D
  4. 15-Way GPU Comparison With Mesa 10.3 + Linux 3.17
Latest Linux News
  1. Phoronix Test Suite 5.4 M3 Is Another Hearty Update
  2. GParted 0.20 Improves Btrfs Support
  3. EXT4 In Linux 3.18 Has Clean-ups, Bug Fixes
  4. Emacs 24.4 Has Built-In Web Browser, Improved Multi-Monitor Support
  5. NVIDIA's NVPTX Support For GCC Is Close To Being Merged
  6. KDE's KWin On Wayland Begins Using Libinput
  7. Khronos Releases OpenVX 1.0 Specification
  8. Linux Kernel Working Towards GNU11/C11 Compatibility
  9. Ubuntu 15.04 Is Codenamed After A Monkey: Vivid Vervet
  10. Following GCC, Clang Looks To Default To C11
Latest Forum Discussions
  1. Users/Developers Threatening Fork Of Debian GNU/Linux
  2. HOPE: The Ease Of Python With The Speed Of C++
  3. Updated and Optimized Ubuntu Free Graphics Drivers
  4. Bye bye BSD, Hello Linux: A Sys Admin's Story
  5. NVIDIA Presents Its Driver Plans To Support Mir/Wayland & KMS On Linux
  6. AMD Is Restructuring Again, Losing 7% Of Employees
  7. Open-Source AMD Fusion E-350 Support Takes A Dive
  8. Upgrade to Kaveri, very slow VDPAU performance