<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"> <html> <head> <meta content="text/html;charset=ISO-8859-1" http-equiv="Content-Type"> </head> <body bgcolor="#ffffff" text="#000000"> Chase, I ran through some power tests today with a Core 2 Duo notebook and an Atom netbook using clean installations of Ubuntu 9.10, Ubuntu 10.04 daily, and Ubuntu 10.04 daily + the updated pm-utils and pm-utils-powersave-policy packages. I found some areas with your packages are saving 200~300 Milliwats, but still in some tests this puts the overall power consumption behind Karmic. I have published results @ <a class="moz-txt-link-freetext" href="http://www.phoronix.com/vr.php?view=14681">http://www.phoronix.com/vr.php?view=14681</a> Let me know if you have any questions or would be interested in any other tests. Cheers, Michael Larabel Bryce Harrington wrote: <blockquote cite="mid:20100319004434.GG11785@bryceharrington.org" type="cite"> <pre wrap="">On Thu, Mar 18, 2010 at 10:59:58AM -0400, Chase Douglas wrote: </pre> <blockquote type="cite"> <pre wrap="">Hello all, I've been working on some fixes, additions, and cleanup to the current pm-utils-powersave-policy package that's slated for inclusion in Lucid. The package takes some of the good stuff from the old laptop-mode-tools package and moves it to policy scripts that are invoked by pm-powersave when on battery power. The items currently include: * 10 second audio codec power down (vs no power down) * 1 minute console (tty1) screen powersave timeout * 60 (vs 15) second dirty page writeback timeout * Disable WOL for ethernet devices * Enable SATA link power save mode (when swapping is unlikely) * Enable multi-thread and multi-core power save mode To test these changes, please add my powersave ppa (ppa:chasedouglas/powersave) and upgrade the pm-utils and pm-utils-powersave-policy packages. When you transition from AC to battery power these scripts will fire and log what they did (if anything) to /var/log/pm-powersave.log. You can also test by running 'sudo pm-powersave true' to enable power saving, or 'sudo pm-powersave false' to disable power saving. </pre> </blockquote> <pre wrap=""> Hi Chase, I installed your ppa and gave it a go. Things behaved pretty well, although I'm not 100% sure how to verify it's working as you expect. Log attached if you're interested. </pre> <blockquote type="cite"> <pre wrap="">One easy way to gauge power savings is to install powertop and execute while on battery power: $ sudo sh -c "sleep 30; powertop -d -t 30" This will wait 30 seconds and then retrieve power information for 30 seconds. During this time you should not use your laptop as we are trying to get a steady-state result. It wouldn't hurt to run this a few times to ensure the results are consistent. In the output you should find a "Power usage (ACPI estimate)" wattage that describes how much energy is used by the system. </pre> </blockquote> <pre wrap=""> I don't see a line like that, but I do see this: no ACPI power usage estimate available HTH, Bryce </pre> </blockquote> </body> </html>