PowerTOP tool released; time to fix the wasted laptop power on fedora?

Guillaume Chazarain gfc at altern.org
Sun May 13 13:55:28 UTC 2007

David Timms a écrit :
> Would this tool help one in tracing the cause of disk accesses in an 
> otherwise inactive/idle notebook. It seems to be about every 3 seconds 
> or so that the hard disk LED lights. This must make it impossible for 
> the hard drive to get powered down - and save power.

echo 1 > /proc/sys/vm/block_dump
and then watching dmesg should tell you what happens.
Typically: some processing reading some files and updating the atimes.
So, look for mount -o noatime.



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