SetCPU on D4.

Discussion in 'Droid 4 Hacks' started by Cegal, Mar 3, 2012.

  1. Cegal

    Cegal Member

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    I had this for my Eris and it worked wonders. I know the stock kernel for the D4 isn't able to OC. My question is, anyone know if undervolting will still work? I installed it last night but I haven't had enough usage to notice any battery saved.

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  2. Cegal

    Cegal Member

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    So after a few days of research and notes, setCPU works well to save battery if combined with a task killer and juice defender. Even more so now that CM9 is out. Although I don't believe the kernel for the droid 4 is able to undervolt, it does under clock the cpu. You can notice lag on switching screens and the like.

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  3. Kas84

    Kas84 Member

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    It saves a whole hell lot of battery if you set it to the minimum MHz when not in use (300). I got over 21 hrs of battery life on a single charge my first day of use by underclocking my CPU and turning off all data connectivity.

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  4. Cegal

    Cegal Member

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    I have a few profiles set, screen off being one. I keep it at 300mhz as well, I find the phone has no trouble waking up for calls and such. With juice defender I keep my sms and calls whitelisted so they get through while blocking everything else.

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  5. Cegal

    Cegal Member

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    Which governor are you using? I usually use on demand but I'm giving the mot_hotplug a shot.

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  6. Kas84

    Kas84 Member

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    What is a governor?
     
  7. jstafford1

    jstafford1 DF Super Moderator Rescue Squad

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    Its like a speed control. It determines when to run the cpu at what speed. Different governors control the speed changes differently.

    "Ready to do nothing at a moments notice."
     
  8. B-Unit

    B-Unit Member

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  9. B-Unit

    B-Unit Member

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    Also, regarding governors, Ive noticed when overclocking that the moto_hotplug governor stops liking me, I have to change to 'on demand'
     
  10. Cegal

    Cegal Member

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    Ahh beautiful! I don't have a reason to OC the droid 4 but UV I'm very interested in. I wonder if I could use the hack then further UV with setcpu...hrmmm...

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  11. B-Unit

    B-Unit Member

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    Last edited: Mar 8, 2012
  12. Cegal

    Cegal Member

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    Much appreciated, I knew I can't control voltage with setcpu. I was just under the impression that the stock droid 4 kernel couldn't undervolt.

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