reducing power usage of Fedora - how you can help!

Rahul Sundaram sundaram at
Thu Aug 9 21:22:00 UTC 2007

Bill Nottingham wrote:
> Would you like your laptop battery to last longer? Would you like your
> servers to use less electricity? We certainly would. So we're investigating
> and fixing Fedora to use less juice.
> One of the biggest power problems is apps that wake up the CPU
> unnecessarily. With the tickless kernel for x86 (and soon x86_64),
> every time this happens it's a chance for power savings lost.

I have been running powertop occasionally over a period of couple of 
weeks and the following were suggested by powertop.


hal-disable-polling --device /dev/scd0
mount -o remount,noatime /
hciconfig hci0 down ; rmmod hci_usb
echo 5 > /proc/sys/vm/laptop_mode

SELinux alert was suggested to be disabled but there is already a bug 
report on that.


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