Laurent de Segur <[EMAIL PROTECTED]> writes:
> End result: I get longer battery life. However, there is probably
> something I missed that could help more in this direction. I would
> appreciate if people on the list could post more hints in order to
> get more juice off the hook. Thanks in advance,
My favorite trick is to remount my filesystems with "noatime".
Especially with a journalling filesystem like XFS, which has to touch
the disk in several places for metadata updates like access time
updates, it can be a big win.
Here's my power control function:
function pwrctl_Core99()
{
case "$1" in
minimum)
# min power, set disk to spin down after 1 minute
$logger -p daemon.info -t pwrctl "going to minimum power"
;;
medium)
# medium power, set disk to spin down after 2.5 minutes
$logger -p daemon.info -t pwrctl "going to medium power"
;;
maximum)
case "$2" in
ac)
$logger -p daemon.info -t pwrctl "ac in, remounting with atime"
mount -o remount,atime /
;;
*)
$logger -p daemon.info -t pwrctl "on battery, remounting with
noatime"
mount -o remount,noatime /
# on battery, set disk to spin down after 5 minutes
;;
esac
;;
warning)
do_warn
;;
sleep)
;;
wakeup)
# maybe force wakeup of media bay devices?
;;
*)
$logger -p daemon.error -t pwrctl "$0: invalid arg $1"
;;
esac
}
