Comment 4 for bug 952556

Confirming this on a 2nd machine : Asus EeePC 1005PE. With numbers.

With the machine clean-booted on precise Beta 1, latest kernel update as of now, running on battery, user logged in, no network connection, wi-fi disabled, no apps running except for an open terminal window.

Leaving the machine alone in this state for 20 minutes and observing the HD SMART values before and after, I get during 20 minutes :

- (4) Start_Stop_Count : +19
- (193) Load_Cycle_Count: +29

That's much too much !

On this machine which has always been running 100% Ubuntu and over 2190 hours of HD runtime, I got 3288 "Start_Stop_Count", that makes on average 1.5 HD Start/Stop per HOUR.

With precise I get about 1 Start/Stop a minute doing nothing - which is 60 times more !

On my other machine for which I 1st reported the bug (network up and some apps running) I would say it's 3-4 Start/Stop per minute !

IMHO this is a show stopper, with such disk "power saving" parameters, this will kill HDs in a couple of months.

(I can also confirm that this crazyness ceases as soon as AC power is connected)