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OLS: Three talks on power managementOLS: Three talks on power managementPosted Jul 1, 2007 13:57 UTC (Sun) by jbailey (subscriber, #16890)Parent article: OLS: Three talks on power management
The biggest culprit for me in powertop is still the wifi bits in the kernel. Unless I turn off the wifi from the hardware switch, my laptop never gets down to C3 at all. I don't have another laptop handy, but I'm curious: Is this a usual side effect of wifi, or is this a bug that should be reported?
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OLS: Three talks on power management Posted Jul 1, 2007 14:24 UTC (Sun) by tetromino (subscriber, #33846) [Link] No, that's not usual. I use ipw2200 on my laptop, and typically spend 20-30% of time in C3. For me, the biggest wakeup culprits are in userspace - hald, firefox, and X.
OLS: Three talks on power management Posted Jul 2, 2007 18:26 UTC (Mon) by gravious (guest, #7662) [Link] I you look at this powertop page[1] you will see it saysXorg shows up high on the hall-of-shame listSo it is not X that is the problem - it is a proggy that is causing X to wake up that needs a slapping. [1] http://www.linuxpowertop.org/known.php
C3 and laptops Posted Jul 2, 2007 9:14 UTC (Mon) by dion (subscriber, #2764) [Link] Strange, my new Fujutsu Siemens Amilo Si 1520 spends 98% of its time in C3 with the CPU throttled down to 1GHz (with the system idle).
Powertop reports that the cpu gets around 300 wakeups pr. second, which I thought was quite bad, so I tried the tickless kernel and that went down to around 100wakeups/s.
I can't complain though, even with a full kernel compile on battery (that tickless kernel) I still got slightly more than 4.5 hours of runtime.
C3 and laptops Posted Jul 9, 2007 13:06 UTC (Mon) by dion (subscriber, #2764) [Link] Correction: It was 95% in C3, but it was while running the full KDE desktop.
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