Extemely slow on battery?

[dave197]

my macbook pro 7,1 revision runs extremely slow on battery and the system is all jumpy, it is fine on mains power.

i have booted in safe mode and this seems to solve the problem

in activity monitor the kernel task process is showing between 160-190% cpu usage

i have done a pram reset and a smc to no avail

any help would be much apreciated

Dave

 

[GGJstudios]

PRAM/NVRAM has nothing to do with battery/power/charging issues, so resetting that won't help. Launch Activity Monitor and look at "All Processes" instead of "My Processes", to identify what is using system resources.

 

[dave197]

Ok thanks for the reply i will take a look and get back with my findings

 

[dave197]

Checked again and it was same as my first post , its crazy

Could the battery be faulty ? But then it works fine on battery in safe mode

 

[8CoreWhore]

Check your Energy Saver settings. Maybe on battery you have lower CPU and GPU?

Is it rebuilding Spotlight?

 

[dave197]

No its not rebuilding spotlight etc, its Basicly unusable on battery due to the speed of it

Like I said the cpu is pretty much maxed out .

I have tried a different hd too but still the same

 

[-aggie-]

No its not rebuilding spotlight etc, its Basicly unusable on battery due to the speed of it

Like I said the cpu is pretty much maxed out .

I have tried a different hd too but still the same

Open Console at look at what messages you are getting?