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

David Timms dtimms at iinet.net.au
Sun May 13 14:29:19 UTC 2007

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} ?


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