Paulo Cavalcanti wrote:
On Sun, Jul 6, 2008 at 1:23 AM, jdow <jdow@xxxxxxxxxxxxx
<mailto:jdow@xxxxxxxxxxxxx>> wrote:
From: "Paulo Cavalcanti" <promac@xxxxxxxxx <mailto:promac@xxxxxxxxx>>
Sent: Saturday, 2008, July 05 12:40
Hi,
I noticed that when I boot on kernel 2.6.25,
my laptop battery, according to gnome, has 3h:40 min of
charge. However, when booting on a 2.6.24 kernel,
this number goes up to 4h:20 min.
Then, I collected some interesting links, discussing this issue.
1) http://fedoraproject.org/wiki/FWN/Issue100
2) http://www.thinkwiki.org/wiki/How_to_reduce_power_consumption
3) http://kdekorte.blogspot.com/
4) http://samwel.tk/laptop_mode/faq
5) http://lwn.net/Articles/257426/
My questions are:
1) should I follow powertop advices blindly?
2) On the first link, in the topic
Reducing Power Usage Of Fedora
https://www.redhat.com/archives/fedora-devel-list/2007-August/msg00558.html
Raul Sundaram recommends using
echo 5 > /proc/sys/vm/laptop_mode
Why this is not done automatically?
3) In the third link, there is an acpi script that really works,
and can be used to change the parameters, when switching from
battery to power chord (although some options are wrong,
specially the hdparm use - be careful).
4) What about laptop-mode-tools available from Dries' repo?
5) Why different kernels have different expectations, regarding
battery
discharge?
I would like to hear some advice, because I have not owned
a laptop for some time, and I do not want to burst my HD
or shorten my battery life.
I have queued reading those links, but while it's fresh in my mind, do
power down your USB interfaces if you don't use them! Recent kernels and
drivers are less critical about this, but you can still add 5-15 min
battery life doing this (depends on chipset, and maybe phase of the moon).
--
Bill Davidsen <davidsen@xxxxxxx>
"We have more to fear from the bungling of the incompetent than from
the machinations of the wicked." - from Slashdot
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