reducing power usage of Fedora - how you can help!

cornel panceac cpanceac at gmail.com
Mon Aug 13 05:42:52 UTC 2007


what about: nvidia, sealert and hald? is there any way to make them use less
power? for example: powertop suggests to do

hal-disable-polling /dev/scd0

is this a safe thing to do? (i've noticed there's no hal-enable-polling
....)

2007/8/13, Ronald Warsow <rwarsow at online.de>:
>
> Justin W wrote:
> > Bill Nottingham wrote:
> >> ...
> >>
> >> 4) Report the results. You can add reports here, on #fedora-devel,
> >>    or to the upstream powertop community at power at bughost.org or
> >>    #powertop on irc.oftc.net.
> >> ...
> > I read at Intel's site about powertop that having activities in C-states
> > 3 and 4 are best, but I don't have either.  I'm curious as to know why I
>
>
> from
> http://ww.linuxpowertop.org/faq.php
> (middle of the page)
>
> Q.
> I see only C0, C1, and C2. Why don't the other C-states show?
>
> A.
> It's mostly a BIOS thing. Some BIOS hide C3/C4 when on AC power, and
> others show only C3 which is really a C4 underneath when on battery.
> Note that the 'max_cstate:C8' value in /proc/acpi/processor/*/power
> tells the maximum number of C-states the Linux kernel can handle, not
> the number of C-states implemented in your hardware.
>
> --
>       Ronald
>
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