Extemely slow on battery?

Discussion in 'MacBook Pro' started by dave197, May 4, 2011.

  1. dave197 macrumors newbie

    Joined:
    Jan 3, 2010
    Location:
    Stafford, UK
    #1
    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
     
  2. GGJstudios macrumors Westmere

    GGJstudios

    Joined:
    May 16, 2008
    #2
    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.
     
  3. dave197 thread starter macrumors newbie

    Joined:
    Jan 3, 2010
    Location:
    Stafford, UK
    #3
    Ok thanks for the reply i will take a look and get back with my findings
     
  4. dave197 thread starter macrumors newbie

    Joined:
    Jan 3, 2010
    Location:
    Stafford, UK
    #4
    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
     
  5. 8CoreWhore macrumors 68020

    8CoreWhore

    Joined:
    Jan 17, 2008
    Location:
    Big D
    #5
    Check your Energy Saver settings. Maybe on battery you have lower CPU and GPU?

    Is it rebuilding Spotlight?
     
  6. dave197 thread starter macrumors newbie

    Joined:
    Jan 3, 2010
    Location:
    Stafford, UK
    #6
    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
     
  7. -aggie- macrumors P6

    -aggie-

    Joined:
    Jun 19, 2009
    Location:
    Where bunnies are welcome.
    #7
    Open Console at look at what messages you are getting?
     

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