Language Selection

English French German Italian Portuguese Spanish

Another Major Linux Power Regression Spotted

Filed under

Since Friday there's been a number of Phoronix articles about a very bad power regression in the mainline Linux kernel, which is widespread, Ubuntu 11.04 is one of the affected distributions, and has been deemed a bug of high importance. This yet-to-be-resolved issue is affected Linux 2.6.38 and 2.6.39 kernels and for many desktop and notebook systems is causing a 10~30% increase in power consumption. Nevertheless, this is not the only major outstanding power regression in the mainline tree, there is another dramatic regression now spotted as well that is yet-to-be-fixed.

Since the discovery last week of the Linux 2.6.38 and 2.6.39 kernels going through excessive amounts of power compared to 2.6.37 and earlier, each day and practically all day since that time has been working on Linux power consumption tests. Power consumption benchmarks are not normally an area we focus on nor do many others, but since the inadvertent discovery of it when testing out the power consumption of past Ubuntu Linux releases, a lot of time has spent investigating the matter within the kernel. In order to do such, there's been continued improvements to the Phoronix Test Suite, Phoromatic,, and the PTS Commercial scripts for better enhancing the power testing, more improvements to multi-point automated regression bisecting, etc. The Phoronix Test Suite has already been able to monitor and log the power consumption (along with temperatures, fan speeds, I/O wait, system load, etc) for any test profile/suite being run by using the system monitor module, but now there is more. Thanks to working on that Easter weekend, coming to fruition because of that today is the discovery of another regression while still working on finding the first commit causing a power regression.

rest here

More in Tux Machines

Android 6.0 Marshmallow review

Android, Google’s mobile operating system, has matured a lot over the past year. It’s running on 1.4 billion devices (up from 1 billion last year) and its most popular app store, Google Play, has more than 1 billion active users. In the last quarter, IDC estimates that Android held 82.8 percent of the global smartphone market. As its newest iteration, 6.0 Marshmallow, rolls out, Android’s going incredibly, undeniably strong. Read more

At the Heart of OpenStack Evolution

As it matures, OpenStack's parallel to Linux is clearer. Linux emerged 20 years ago as a somewhat exotic challenger to proprietary operating systems. Today, it is one of the most popular and widely used OSes. However, Linux still exists in a market of mixed use. It's likely that OpenStack will be subject to the same effect, becoming a viable option among a number of cloud infrastructures. Read more

GParted Live Gets the Latest Updates from Debian Sid

GParted Live, a small bootable GNU/Linux distribution for x86-based computers that can be used for creating, reorganizing, and deleting disk partitions, has been upgraded to version 0.23.0-2 and is now available for download. Read more

MATE-Desktop 1.11 Released, Working Towards MATE 1.12

MATE developers are currently working towards MATE 1.12. MATE 1.12 is expected to have full support for GTK3, initial support for Wayland, support for GNOME Account Servers, full support for systemd's logind, xf86-input-libinput driver support, and various other changes. The work-in-progress items can be found via the MATE-Desktop Roadmap. Read more