Develop Bugs

GN and Setcpu, powersaving.

As far as power saving goes, we all know dark wallpapers, small data usage and brightness can drastically reduce power consumption. CPU is also a large part of power usage especially the GN's dual core. I haven't messed with SetCPU since my nexus one. What might be some of the SetCPU profiles you might be using? And some of the other power saving techniques?
So far I just have a flat black wallpaper, auto-brightness, and a setCPU profile of the lowest MHz when screen off, although I can't tell if the profile is making a difference.

I have screen off at 350/700 because 700mhz only costs me an extra 100mv with my undervolts. And battery <20% @ 350/700 Also but my battery life is so good i havent made it to <20% yet.
Sent from my Galaxy Nexus using xda premium

How do i change the amount of volts used in SetCPU?, sorry i have no experience with voltages haha

mikeacela said:
How do i change the amount of volts used in SetCPU?, sorry i have no experience with voltages haha
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You need a kernel such as this
I'm currently using the UV only kernel as I dont find an overclock is necessary on the Gnex.
Basically, the stock kernels on this phone (like every other phone) don't support voltage control out of the box

@rbiter said:
I have screen off at 350/700 because 700mhz only costs me an extra 100mv with my undervolts. And battery <20% @ 350/700 Also but my battery life is so good i havent made it to <20% yet.
Sent from my Galaxy Nexus using xda premium
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I have the same screen off profile, with conservative governor. On the stock 4.0.1 kernel. No problems with this at all. Probably saves quite a bit of battery.

Antzor said:
You need a kernel such as this
I'm currently using the UV only kernel as I dont find an overclock is necessary on the Gnex.
Basically, the stock kernels on this phone (like every other phone) don't support voltage control out of the box
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Is this kernel compatible with CDMA bands?

mikeacela said:
Is this kernel compatible with CDMA bands?
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Nope
Sent from my Galaxy Nexus using XDA App

Running ARHD 2.1.2 on LTE VZW GNex
CPU Profiles:
350/350 when Battery <20% Priority 97
700/350 when Battery <50% Priority 99
920/350 when Battery <80% Priority 98
350/350 when Screen Off Priority 100
Not sure how effective they are, only second day using the profiles.

How to use voltage control

How can do I use voltage control and what are the best settings for my epic 4g I'm on shadowkernel
Sent from my SPH-D700 using Tapatalk

This is going to be a long post........
Once downloaded there are a lot to do but in general there are i/o schedulers I think that's how data is handled Idk google is ur friend. Anyways govenors handles the cpu and "governs" the frequencies it needs to be pushed to depending on what the kernel is telling it via touch input wifi cell signal etc etc. And on the sliders are the frequencies. The max is the max amount the cpu will be pushed and the min vice versa. In the voltages tab you use these to disable or enable frequencies..... tap the grayed out cpu picture.... to enable.... then you tap on the numbers to open the sliders and this will allow you to undervolt this takes the stock voltage your battery puts out and lowers it to put out less battery. For some guidelines ill post what I use but every phone is different.
100/1200. OnDemand Sio
100: -200
200-175
400:-150
800:-100
1000:-75
1100:-50
1200:-50
Sent From My Cyan Samurai

Is the lower the better?
Sent from my SPH-D700 using Tapatalk

thabest85 said:
Is the lower the better?
Sent from my SPH-D700 using Tapatalk
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On what??? Frequency or voltage for frequency higher is faster. Voltage the lower is better but not too low otherwise your phone will freeze and data will get corrupted
Sent From My Cyan Samurai

thabest85 said:
Is the lower the better?
Sent from my SPH-D700 using Tapatalk
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Higher frequency = the phone operates faster. Some users' phones lock up at the higher frequencies (1.3GHz+), so you need to experiment to see what your phone can handle.
Lower voltage = the phone uses less battery while using that frequency. If the voltage is lower than the CPU needs to run at that frequency, your phone could lock up, so you need to experiment with voltages to find a set that works before setting them as boot.

[Q] Overclocking

How safe is it to overclock my Galaxy S II to 1.78 max and 1.78 min?
If not, what combination of max and min would be most safe but still give a noticeably boost in speed.

In theory overclocking isn't that good as is adding additional strain to the CPU than it was designed to.this will cause wear and tear faster possibly shortening the life of your phone. I would set your min much lower and place it on demand. There's no need for your CPU to be running at max all the time, set it on demand do it only runs at a faster speed when it's needed to...
PS this has been covered in other threads a search would have given you an answer oppose to starting another thread.
Sent from my SGH-T989 using XDA App

Voltage kills components, not overclocking.
You can google this and research it if you would like.

I keep mine min 810 max 1782 ondemand with setcpu.
810 is more than enough(still faster than Iphone4) to hold its own without lag when you actually start to bog it down.

I think the max itll go is 1.83ghz. in reality nothing over 1.65ish really adds anything.
Sent from my SGH-T989 using XDA App

locked mine at 1.51ghz which is plenty of fast, no throttling and no lag

Setting the min up that high will kill your battery in hours. You can over clock it by setting the max up to whatever you like. Set the min lower. Then set your governor. Overclocking will wear down your cpu faster and make it run hotter. Overvolting will do the same. I would only overclock when I need it. Normally mine is set at 1.5 for max and .3-.5 for min.

Quick under volting question

I am familiar with undervolting, went -75 across the board with no problems, obviously the lowest frequencies are all at 800. Would it be beneficial to set the minimum CPU frequency to the highest frequency at 800mv? Seeing as there is no voltage difference between 192mhz and 594mhz wouldn't it make sense and even save battery to set minimum to 594 so it can idle faster basically and use less time to do calcs at minimum frequency?
Sent from my SAMSUNG-SGH-T989 using xda app-developers app

zander21510 said:
I am familiar with undervolting, went -75 across the board with no problems, obviously the lowest frequencies are all at 800. Would it be beneficial to set the minimum CPU frequency to the highest frequency at 800mv? Seeing as there is no voltage difference between 192mhz and 594mhz wouldn't it make sense and even save battery to set minimum to 594 so it can idle faster basically and use less time to do calcs at minimum frequency?
Sent from my SAMSUNG-SGH-T989 using xda app-developers app
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Theoretically yes, but undervolting that low at high clock speeds will greatly increase your chances of freezing.

[Q] Underclocking Query

How much can the phone be underclocked while maintaining the stability of the system?
What would happen if i set Max freq to 600 Mhz?
What is the best thing to do to save up the very last bit of juice in the battery for emergency situations where i would only need the phone and message facility? Besides switching off Bt,wifi,sync.
Im asking because i was wondering if underclocking "too much" saves a substantial amount of battery when my battery is quite low and I am "hours away" from a charging port!
And is there a way to change the carrier name on the notification drop down to whatever we want.
Sorry if i sound noobish or if a similar query has been asked before
Thnx.

Underclocking the CPU dramatically isn't going to gain you a great deal in the way of extra battery life because:
1. Unless you are heavily taxing the CPU (complex 3d games etc), the biggest drains on the battery are the screen and the radio.
2. If the screen is off, the phone will drop the CPU frequency right down anyway.
The best way to get extended battery life is simply to carry spare batteries!
Regards,
Dave
Sent from my GT-N7100 using Tapatalk 2

I think 600mhz is way too low and counter productive or for that matter anything less than 1ghz. The phone will lag alot and you'll have freezes. You'll probably end up using up alot of the battery life trying to get tasks completed. You could try leaving the stock clockspeed 1.6ghz, set minimum cores to 2 and slightly undervolt to -25mv, leave the gpu setup to its default 533mhz and also undervolt to -25mv using a kernel that supports stweak app. Then run an app called Stability Test for 10minutes to check for errors.
Also I tried Go Power Master, which can be assigned to disable certain features once your battery hits critical low levels.
Sent from my GT-N7100 using xda premium

bushako said:
I think 600mhz is way too low and counter productive or for that matter anything less than 1ghz. The phone will lag alot and you'll have freezes. You'll probably end up using up alot of the battery life trying to get tasks completed. You could try leaving the stock clockspeed 1.6ghz, set minimum cores to 2 and slightly undervolt to -25mv, leave the gpu setup to its default 533mhz and also undervolt to -25mv using a kernel that supports stweak app. Then run an app called Stability Test for 10minutes to check for errors.
Also I tried Go Power Master, which can be assigned to disable certain features once your battery hits critical low levels.
Sent from my GT-N7100 using xda premium
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Thats quite informative. Thanx!