Messages in this thread |  | | | Date | Wed, 27 Jul 2005 10:00:51 +0200 | | From | Pavel Machek <> | | Subject | Re: Power consumption HZ250 vs. HZ1000 |
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Hi!
> > USB devices prevent entering C3 and any interesting powersaving, > > try without USB... > > Why do USB devices prevent C3? If it was because of the timer polling > in the root hub, I believe that should be fixed now. > > Or is there some other reason?
Yes. UHCI zas keeps doing DMA all the time.... It can be worked around, but it means proper usb powermanagment support. Pavel -- teflon -- maybe it is a trademark, but it should not be. - 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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