I use powertop on my F8 laptop(thinkpad T41) to hunt down
power waste. I have my laptop running pretty well by using it.
But one thing I'm wondering about, as it runs, it gives out
advice on how to save power. One of these is to
put usbcore.autosuspend = 1 into /boot/grub/grub.conf
on the kernel line. So I did that
kernel /vmlinuz-188.8.131.52-49.fc8 ro root=LABEL=/1 rhgb usbcore.autosuspend=1
and have since rebooted a few times. But when I run powertop again, it's still
giving that suggestion to use autosuspend. I was initially assuming that powertop only gave power advice on things that you weren't doing.
I assumed that because there were other changes I made
(I added these to /etc/rc.local ):
echo 1 > /sys/module/snd_ac97_codec/parameters/power_save
echo 1500 > /proc/sys/vm/dirty_writeback_centisecs
and powertop quit telling me to do these changes afterwards
so I'm confused why it's still saying to do the
usbcore.autosuspend = 1 change after I've already done that.