<div class="gmail_quote">On Wed, May 5, 2010 at 12:38 AM, Paul Fox <span dir="ltr"><<a href="mailto:pgf@laptop.org">pgf@laptop.org</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex;">
<div class="im">martin wrote:<br>
><br>
> Running powertop on your machine is hugely informational once you've<br>
> read the powertop website docs.<br>
<br>
</div>re: powertop -- with silbe's help our battery driver now provides<br>
enough of the expected properties under /sys to let powertop make<br>
crude power measurements [1]. you have to build from their svn,<br>
though, because of a bug that's not normally exposed on machines<br>
using the ACPI driver. (to clarify -- i have the fix -- it's not<br>
in their svn repo yet -- i need to send it in.)<br>
<br>
but as richard implied, a tool like powertop won't help you tune<br>
your laptop much, since it only measures what happens when it's<br>
running. we save so much power with aggressive S3 that the changes<br>
from P-states, and to some extent C-states, are in the noise.<br></blockquote><div><br></div><div>I see, cool. I must say I'm very surprised by how long the XO 1.5 can hold the battery when it's suspended. I have yet to mod my B2 with the wireless ECO and since it always turns off wireless when suspended IIRC it used like 12% of the battery while suspended for 8 hours. Must check this again, it seemed too good to be true and a great work on the power management details!</div>
<div><br></div><div>Best regards,</div><div>Tiago</div><div> </div><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex;">
<br>
paul<br>
[1] richard's logs and tools are far more informative, but it's<br>
fun watching the powertop numbers change.<br>
<div class="im">=---------------------<br>
paul fox, <a href="mailto:pgf@laptop.org">pgf@laptop.org</a><br>
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