z540 stanby problem when battery power is low

normally, when the battery power is low, PCs should go to 'standby/sleep mode' and save all current tasks in Memories. PCs will wake up and restore all previous tasks after plugging in AC power supply.

however, my z540 is weird, when the battery power is low, it does go to standby/sleep mode, but then it will wake up itself and go to standby/sleep mode again..Over And Over... until it runs out of all battery power. so all current opened operations will be lost, the only thing I can do to prevent form losing my job is to connect AC power supply immediately before the battery power is used up.

why? does any z owner encounter the same situation as mine? how to reslove this problem?

thanks

 

Some times my Z woke up himself from sleep state and drain all his power even if the settings have to prevent from 0% battery drain. Also is your Z in operational state? i mean mine use to froze when hapened.

power management in vaio computer is a crap

 

thanks,
you are right, so your z has almost same problem as mine.

the different thing is that the problem is always happened on my z when the battery power is low everytime, not sometimes as yours

if I donot connect AC power supply immediately, z will gos and back between 'sleep mode' and wake up over and over, i cannot do anyting to intervene it, until it uses up all battery power and turn off itself.

do you resolve the problem of your z?

thanks