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Thread: SetCPU on D4.

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    Cegal's Avatar
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    #1

    SetCPU on D4.

    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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  3. Droid
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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.

    Sent from my XT894 using DroidForums
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    #3
    Quote Originally Posted by Cegal View Post
    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.

    Sent from my XT894 using DroidForums
    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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    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
    Which governor are you using? I usually use on demand but I'm giving the mot_hotplug a shot.

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    Quote Originally Posted by Cegal View Post
    Which governor are you using? I usually use on demand but I'm giving the mot_hotplug a shot.

    Sent from my XT894 using DroidForums
    What is a governor?
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    #7
    Quote Originally Posted by Kas84 View Post
    What is a governor?
    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."
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    #8
    Im using the Opptimizer hack to change frequencys and voltages. Ive found that there is signifigant room for undervolting the stock 1.2 Ghz, as well as the ability to OC to near 1.4 Ghz with minimal voltage increases. As always, YMMV. opptimizer - The OPPtimizer Projekt by FreeWELL/tekahuna - Google Project Hosting
    DROID4: Rooted and OC Hacked
    DROID : SimplyStunning 5.6 1.2 Ghz ULV Kernel
  10. Master Droid
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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'
    DROID4: Rooted and OC Hacked
    DROID : SimplyStunning 5.6 1.2 Ghz ULV Kernel
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    Quote Originally Posted by B-Unit View Post
    Im using the Opptimizer hack to change frequencys and voltages. Ive found that there is signifigant room for undervolting the stock 1.2 Ghz, as well as the ability to OC to near 1.4 Ghz with minimal voltage increases. As always, YMMV. opptimizer - The OPPtimizer Projekt by FreeWELL/tekahuna - Google Project Hosting
    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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