Messages in this thread | | | Date | Wed, 10 Aug 2005 15:08:04 -0400 | From | Bill Davidsen <> | Subject | Re: Power consumption HZ100, HZ250, HZ1000: new numbers |
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Pavel Machek wrote: > Hi! > > >>I was finally able to get C3 state working. It seems that my BIOS is >>leaving USB controllers in an active state(?). Without any USB drivers >>loaded, C3 is not possible. With drivers loaded, but no device plugged >>in C3 works fine. Kernel is 2.6.13-rc3-mm3 + acpi-sbs. >> >>With working C3 there are indeed differences: >> >>Voltage is 16.5 V >> >>HZ=100: ~460 mA => 7.59 W >>HZ=250: ~468 mA => 7.72 W >>HZ=1000: ~494 mA => 8.15 W > > > 0.55W difference, wow. And that's 7% difference to overall system > consumption.
But it's totally meaning less isn't it? Disable the USB, there goes the kb/mouse, turn off the LCD you can't see anything, spin down the disk, you can't do i/o, and run the CPU in idle so you can't DO anything.
At that point you might as well turn it off and save 100%. - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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