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



Guillaume Chazarain wrote:
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.
OK, that works. Is there some way to tell dmesg to do the equivalent of:
tail -f dmesg {which doesn't work} ?

DaveT.


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