I got suggestions for enabling SATA link power management, writeback time and kill hal add-on storage when I run powertop, so I enabled all these suggestions at startup in /etc/rclocal.d, and upon reboot I can see that they have taken effect, but when I then run Powertop, it shows that wakeups per second are just as high as if I haden't set these options, and it pops up the same suggestions again. If I accept the suggestions when they popup by pressing W for writeback, S for sata link power mgmt and K for disable cdrom polling, then the wakeups per second drops dramatically.
Why does this happen? Can Powertop not see that I already have these options set? Regards, Andrew
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