Language Selection

English French German Italian Portuguese Spanish

Linux 3.1 Kernel Draws More Power With Another Regression

Filed under
Linux

If you were hoping that the Linux 3.1 kernel would fix the big power regression problem that's caused by PCI Express Active State Power Management (ASPM) being disabled on more systems since the release of the Linux 2.6.38 kernel, you're not in luck. There has not been any active work in this area. Making things worse though for mobile Linux users interested in a long lasting battery is another new regression in the Linux 3.1 kernel. Affected systems can easily see a 30% increase in power consumption simply when comparing the Linux 3.0 kernel to the current code being assembled for Linux 3.1. For an Intel Sandy Bridge notebook, the power consumption is up by 76% just over the course of this year from Linux kernel regressions.

Besides the new Linux 3.1 kernel power regression, there's also a power regression introduced in the Linux 3.0 kernel that has previously not been talked about on Phoronix. The Linux 3.0 power draw is up by 24% over the Linux 2.6.39 kernel. With all of these regressions, going from the Linux 2.6.38 to 3.1 kernel on an Intel Sandy Bridge notebook increases the power consumption by 76% under Ubuntu Linux and a dramatically shorter battery life.

rest here




More power!

More power!

Comment viewing options

Select your preferred way to display the comments and click "Save settings" to activate your changes.

More in Tux Machines

Distro Development: Rescatux and Bodhi

  • Rescatux 0.40 beta 9 released
    Many code in the grub side and in the windows registry side has been rewritten so that these new features could be rewritten. As a consequence it will be easier to maintain Rescapp. Finally the chntpw based options which modify the Windows registry now perform a backup of the Windows registry files in the unlikely case you want to undo some of the changes that Rescapp performs. I guess that in the future there will be a feature to be able to restore such backups from Rescapp itself, but, let’s focus on releasing an stable release. It’s been a while since the last one. UEFI feedback is still welcome. Specially if the Debian installation disks work for you but not the Rescatux ones.
  • Bodhi 4.0.0 Updates and July Donation Totals
    Late last month I posted a first alpha look at Bodhi 4.0.0. Work since then has been coming along slowly due to a few unpredictable issues and my own work schedule outside of Bodhi being hectic over the summer. Bodhi 4.0.0 will be happening, but likely not with a stable release until September. I am traveling again this weekend, but am hoping to get out a full alpha release with 32bit and non-PAE discs next week.

Devices and Android

Leftovers: BSD/LLVM

Emma A LightWeight Database Management Tool For Linux

Today who does not interact with databases and if you're a programmer then the database management is your daily task. For database management, there is a very popular tool called, MySQL Workbench. It's a tool that ships with tonnes of functionalities. But not all of us as beginner programmers use all Workbench features. So here we also have a very lightweight database manager in Linux, Emma. Read
more