Hello!
My "Cpu Type" is Slow and I want to undervolt it (to get better battery and less heat).
What are the best undervolting for keeping the device stable and with better battery and less heat?
Thanks!
Every chip is different, regardless of bin type. You'll have to experiment and see for yourself. Drop it a notch and use your phone to test for stability. If it seems stable, drop it one more. Keep going until you find the place that causes freezes. Then bump it back up and use the "set on boot" option all performance apps have.
estallings15 said:
Every chip is different, regardless of bin type. You'll have to experiment and see for yourself. Drop it a notch and use your phone to test for stability. If it seems stable, drop it one more. Keep going until you find the place that causes freezes. Then bump it back up and use the "set on boot" option all performance apps have.
Click to expand...
Click to collapse
I undervolted to 50, will it do what I want or should I undervolt more?
I heard that if I undervolt too much the device won't turn on, how can I avoid that?
Thank for the answer!
Wassupdog said:
I undervolted to 50, will it do what I want or should I undervolt more?
I heard that if I undervolt too much the device won't turn on, how can I avoid that?
Thank for the answer!
Click to expand...
Click to collapse
Don't set the voltage settings to stick on boot until you find your lowest stable voltage.
Sent from my Nexus 4 using xda app-developers app
Wassupdog said:
I undervolted to 50, will it do what I want or should I undervolt more?
I heard that if I undervolt too much the device won't turn on, how can I avoid that?
Thank for the answer!
Click to expand...
Click to collapse
I thought I explained this already, but I'll try it a different way. I can't answer the question because your chip is different from mine, along with everyone else's. The voltage will not be set until after the boot process is complete, which is why I told you to determine the lowest stable voltage and THEN use the set on boot option. That way you don't get an immediate freeze on every boot. Make sense?
Again, you still need to determine what your optimal voltage change is. We cannot tell you that.
Also, undervolting changes your battery life VERY little. It will likely not even be noticeable. Where you'll see the real benefit is in the area of heat. Even the 50 you've already done should make a noticeable change. On a device with a lot lower throttling point than most, this is a good thing.
Harry GT-S5830 said:
Don't set the voltage settings to stick on boot until you find your lowest stable voltage.
Sent from my Nexus 4 using xda app-developers app
Click to expand...
Click to collapse
estallings15 said:
I thought I explained this already, but I'll try it a different way. I can't answer the question because your chip is different from mine, along with everyone else's. The voltage will not be set until after the boot process is complete, which is why I told you to determine the lowest stable voltage and THEN use the set on boot option. That way you don't get an immediate freeze on every boot. Make sense?
Again, you still need to determine what your optimal voltage change is. We cannot tell you that.
Also, undervolting changes your battery life VERY little. It will likely not even be noticeable. Where you'll see the real benefit is in the area of heat. Even the 50 you've already done should make a noticeable change. On a device with a lot lower throttling point than most, this is a good thing.
Click to expand...
Click to collapse
Thank you both!
What can I do to increase battery life?
Wassupdog said:
Thank you both!
What can I do to increase battery life?
Click to expand...
Click to collapse
Play around with different kernels. They will all give you different performance vs. battery life. Use the one that suits you. Personally, I go back and forth between hells core and semaphore.
You might also check out greenify. It will hibernate apps that you tell it to instead of letting them suck up resources in the background.
estallings15 said:
Play around with different kernels. They will all give you different performance vs. battery life. Use the one that suits you. Personally, I go back and forth between hells core and semaphore.
You might also check out greenify. It will hibernate apps that you tell it to instead of letting them suck up resources in the background.
Click to expand...
Click to collapse
I have no problem to move between kernels but just if they have Franco's colors tuning option.
The Nexus screen looks wayyy better with it.
Wassupdog said:
I have no problem to move between kernels but just if they have Franco's colors tuning option.
The Nexus screen looks wayyy better with it.
Click to expand...
Click to collapse
This should help with semaphore. It uses Franco's values, but in a different order.
http://forum.xda-developers.com/showpost.php?p=43828267&postcount=2035
estallings15 said:
This should help with semaphore. It uses Franco's values, but in a different order.
http://forum.xda-developers.com/showpost.php?p=43828267&postcount=2035
Click to expand...
Click to collapse
Semaphore is good for battery life?
And I ran antutu with -75 UV and it is very not stable.
I can stay at 50 .
Wassupdog said:
Semaphore is good for battery life?
And I ran antutu with -75 UV and it is very not stable.
I can stay at 50 .
Click to expand...
Click to collapse
It is for me. That's why I recommended it.
You might take note of those voltages that work for you. I can't remember, but Semaphore might have lower values right out of the gate.
Now stop asking questions and start trying things out If you're scared, make a backup. No matter what you do with the voltage settings, you can always restore the backup.
Happy flashing!
estallings15 said:
It is for me. That's why I recommended it.
You might take note of those voltages that work for you. I can't remember, but Semaphore might have lower values right out of the gate.
Now stop asking questions and start trying things out If you're scared, make a backup. No matter what you do with the voltage settings, you can always restore the backup.
Happy flashing!
Click to expand...
Click to collapse
Thank you very much !
Related
OK for those that boast supreme bat life and performance please share your "EXACT" setup for set CPU, rom, kernel etc. Pretty please.
btucker2003 said:
OK for those that boast supreme bat life and performance please share your "EXACT" setup for set CPU, rom, kernel etc. Pretty please.
Click to expand...
Click to collapse
I'm guessing you're looking to underclock your CPU right?
Because "supreme bat life" and overclocking in the same sentence is an oxymoron.
The best thing I did was uninstall setcpu and let the custom kernel work,
Sent from my Nexus S 4G using xda premium
Currently running Taboonay 2.1b with rtrip's custom kernel 3.4 - it had issues with setcpu so I uninstalled it and am letting the kernel do it's thing - OC'd t 1.4 and it's smooth and fast but still has a decent battery life despite running a bunch of stuff, games, music, email and navigation - wifi on always...
Standby is about 3.5 days / on constantly about 7.5 hour life, so..yeah...Me likey..
YMMV
kjy2010 said:
I'm guessing you're looking to underclock your CPU right?
Because "supreme bat life" and overclocking in the same sentence is an oxymoron.
Click to expand...
Click to collapse
LOL, I was wondering the same thing about "boast supreme bat life and performance". This reminded me of my days of tuning cars and we we used to say "Fast, cheap, and reliable. You can have 2 of the 3."
OP, all machines won't react exactly the same way and people use their tablets for difference purposes, so having others post exactly what they have setup probably isn't the best way to go. First, you need to find a kernel that works and is stable for everything you need. Kernels are changing all the time, sometimes they move two steps forward and 1 step back before they are stable again and support everything a user needs (docking, NTFS mount, cifs, 3G etc.). After you find a kernel that is stable and suits your needs using the defaults, then you can take it a step further if you wish.
If you want a performance minded setup, setup a profile (in setcpu or one of the others) using the desired clock speed. Try 1.4 or 1.5 Ghz to start as that seems to work for most. Use the governor recommended by the kernel developer for best results. The more you over-clock, the more battery you will consume.
If things are stable with the default voltages, then experiment with under-volting to get the best battery life you can for your performance profile. Start with the recommended voltages with your kernel and adjust down -10uV at your max CPU frequency to find out how much voltage you can reduce and still have a stable system. Make sure you run through all the things you typically do and give it a good workout before moving down to another voltage. Using benchmarks can be helpful for finding stability, but may not match how you use the tablet in the real world.
If you want the best battery life, then experiment with under-clocking to 912MHz and then try under-volting that clock speed to find your stable point. You could then setup a setup "battery mizer" profile for that.
If this sounds too difficult and time consuming for you, then do as the others have stated and just install a custom kernel that does what you need and let it work for you. It should give you a good "in-between" setup. For me, I am addicted to 1.5GHz as the increased smoothness from stock is very noticeable for me. I can recharge every night after 6 hrs or so, so this works great for me. If I go on the road and need to take it easy on the battery, I use another profile to get better battery life for the time being.
Hope this helps you out.
kjy2010 said:
I'm guessing you're looking to underclock your CPU right?
Because "supreme bat life" and overclocking in the same sentence is an oxymoron.
Click to expand...
Click to collapse
_motley said:
LOL, I was wondering the same thing about "boast supreme bat life and performance". This reminded me of my days of tuning cars and we we used to say "Fast, cheap, and reliable. You can have 2 of the 3."
OP, all machines won't react exactly the same way and people use their tablets for difference purposes, so having others post exactly what they have setup probably isn't the best way to go. First, you need to find a kernel that works and is stable for everything you need. Kernels are changing all the time, sometimes they move two steps forward and 1 step back before they are stable again and support everything a user needs (docking, NTFS mount, cifs, 3G etc.). After you find a kernel that is stable and suits your needs using the defaults, then you can take it a step further if you wish.
If you want a performance minded setup, setup a profile (in setcpu or one of the others) using the desired clock speed. Try 1.4 or 1.5 Ghz to start as that seems to work for most. Use the governor recommended by the kernel developer for best results. The more you over-clock, the more battery you will consume.
If things are stable with the default voltages, then experiment with under-volting to get the best battery life you can for your performance profile. Start with the recommended voltages with your kernel and adjust down -10uV at your max CPU frequency to find out how much voltage you can reduce and still have a stable system. Make sure you run through all the things you typically do and give it a good workout before moving down to another voltage. Using benchmarks can be helpful for finding stability, but may not match how you use the tablet in the real world.
If you want the best battery life, then experiment with under-clocking to 912MHz and then try under-volting that clock speed to find your stable point. You could then setup a setup "battery mizer" profile for that.
If this sounds too difficult and time consuming for you, then do as the others have stated and just install a custom kernel that does what you need and let it work for you. It should give you a good "in-between" setup. For me, I am addicted to 1.5GHz as the increased smoothness from stock is very noticeable for me. I can recharge every night after 6 hrs or so, so this works great for me. If I go on the road and need to take it easy on the battery, I use another profile to get better battery life for the time being.
Hope this helps you out.
Click to expand...
Click to collapse
Hah! Well thanks but I'm pretty sure I didn't say "overclocking" but gotcha thanks for the feedback and answers. I was merely looking for setups compared to what I'm running now. TIA
I am experiencing lag on real racing 3, on high graphics. If I overclock to say 2ghz on cpu, will the tablet be stable enough? Should I undervolt ( and does it actually make any difference on temps)? I want to overclock but not at the cost of huge battery drain, can some1 recommend me a good kernel and some stable oc steps?
Sent from my Nexus 10 using Tapatalk HD
lvnatic said:
I am experiencing lag on real racing 3, on high graphics. If I overclock to say 2ghz on cpu, will the tablet be stable enough? Should I undervolt ( and does it actually make any difference on temps)? I want to overclock but not at the cost of huge battery drain, can some1 recommend me a good kernel and some stable oc steps?
Sent from my Nexus 10 using Tapatalk HD
Click to expand...
Click to collapse
Are you running a custom ROM and kernel? I play RR3 daily and have NO lag. AOKP PUB ROM with ktmanta kernel, at 1.7mhz CPU and GPU OC to 720. Runs great.
Most OC is safe, issues are really with battery and overheating. I've run for long periods at 1900 just fine.
So there's no way the tablet will melt down because of the heat? Does warranty cover that? Assuming they don't know it was overclocked, which they couldn't because the device would be dead, right? I guess they don't bother to repair it and see if it was rooted.
LE: btw did you manage to safely undervolt? Even a -5 gives me reboots on most freqs.
Any time I try to use the app from the store to set the graphics mode it causes problems. Running RR3 without it works fine.
lvnatic said:
So there's no way the tablet will melt down because of the heat? Does warranty cover that? Assuming they don't know it was overclocked, which they couldn't because the device would be dead, right? I guess they don't bother to repair it and see if it was rooted.
LE: btw did you manage to safely undervolt? Even a -5 gives me reboots on most freqs.
Click to expand...
Click to collapse
Take a look at the KTmanta thread. KTmanta is a great option for what you are after, he notes and codes distinctions between clocking and thermal protection, plus unless you lock the settings, they will reset at reboot!
If you tell Google you messed it up from some sort of tinkering, no - they won't help you.
lvnatic said:
So there's no way the tablet will melt down because of the heat? Does warranty cover that? Assuming they don't know it was overclocked, which they couldn't because the device would be dead, right? I guess they don't bother to repair it and see if it was rooted.
LE: btw did you manage to safely undervolt? Even a -5 gives me reboots on most freqs.
Click to expand...
Click to collapse
I am assuming you must be using the KTmanta kernel right? I thought it was the only kernel right now that allows for user control undervolting. Trinity has a static -50mv value set on all frequencies by default. You should be able to undervolt just about everything. Getting lockups at -5mv lets me think there is something you are not doing correctly
EDIT: threw the quote in so its less confusing
EniGmA1987 said:
I am assuming you must be using the KTmanta kernel right? I thought it was the only kernel right now that allows for user control undervolting. Trinity has a static -50mv value set on all frequencies by default. You should be able to undervolt just about everything. Getting lockups at -5mv lets me think there is something you are not doing correctly
Click to expand...
Click to collapse
Yes, the kernel
Edit: oops thought you were asking me, I see now I was confused.
Hello,
I have Galaxy 4 I9505 with foxhound 2.0 and Adam kernel.
I want to do undervoltage.
Which kernel is best for it? And how to check the stability of the device after UV and whether it endangers the cell phone?
Does it improve my battery life?
Thank you all!
Up
up
And you can't go to the two development sections & read the first page of a few threads devoted to particular kernels why exactly ? (That's the reason why you haven't had a response).
MistahBungle said:
And you can't go to the two development sections & read the first page of a few threads devoted to particular kernels why exactly ? (That's the reason why you haven't had a response).
Click to expand...
Click to collapse
Sorry I'm new here.
I will search what you said thanks..
But it's not written there if its can harm the device and how to check stability..
OK.
1) Undervolting won't harm your device. If anything, it's kinder on your phone's components because it should run a little bit cooler under most circumstances.
2) Re: stability, decrease in 25mV steps, test thoroughly to make sure it's stable (this varies from phone to phone), then decrease another 25mV & so on. This applies whether you're applying the undervolt 'globally' (I.E the same across all CPU frequencies), or whether you're applying different levels of undervolting to different frequencies. It seems most I9500/I9505's can handle -50mV (though yours may not) globally.
So you're only going to find out what's truly stable for your phone by testing.
eden66 said:
Which kernel is best for it?
Click to expand...
Click to collapse
I'm using KTweaker to undervolt
eden66 said:
And how to check the stability of the device after UV and whether it endangers the cell phone?
Click to expand...
Click to collapse
Undervolt doesn't damage the phone, if the phone doesn't reboot itself or app force closes then it's stable or you can use this app to test stability
eden66 said:
Does it improve my battery life?
Click to expand...
Click to collapse
Yes, it does improve battery life as undervolting the CPU and GPU means it's using less battery
Crauze said:
I'm using KTweaker to undervolt
Undervolt doesn't damage the phone, if the phone doesn't reboot itself or app force closes then it's stable or you can use this app to test stability
Yes, it does improve battery life as undervolting the CPU and GPU means it's using less battery
Click to expand...
Click to collapse
thanks you very much!!
If you want to test the stability after undervolting I can suggest antutu benchmark with built in stability test.
Sent from my GT-I9505 using xda app-developers app
eden66 said:
thanks you very much!!
Click to expand...
Click to collapse
If you want to THANKS someone .. hit the "THANKS" button .. It means something for the guys that help you.
MistahBungle said:
OK.
1) Undervolting won't harm your device. If anything, it's kinder on your phone's components because it should run a little bit cooler under most circumstances.
2) Re: stability, decrease in 25mV steps, test thoroughly to make sure it's stable (this varies from phone to phone), then decrease another 25mV & so on. This applies whether you're applying the undervolt 'globally' (I.E the same across all CPU frequencies), or whether you're applying different levels of undervolting to different frequencies. It seems most I9500/I9505's can handle -50mV (though yours may not) globally.
So you're only going to find out what's truly stable for your phone by testing.
Click to expand...
Click to collapse
benni2903 said:
If you want to test the stability after undervolting I can suggest antutu benchmark with built in stability test.
Sent from my GT-I9505 using xda app-developers app
Click to expand...
Click to collapse
Crauze said:
I'm using KTweaker to undervolt
Undervolt doesn't damage the phone, if the phone doesn't reboot itself or app force closes then it's stable or you can use this app to test stability
Yes, it does improve battery life as undervolting the CPU and GPU means it's using less battery
Click to expand...
Click to collapse
zoUphd2 said:
If you want to THANKS someone .. hit the "THANKS" button .. It means something for the guys that help you.
Click to expand...
Click to collapse
Thanks you all!
And zoUphd2 thanks. I did it
How do I lower my touch frequency? Whenever I touch the screen immediately two cores jump to the highest frequency available which is 1267 MHz, I have the max frequency locked at that in general... So how do I lower it, or would this not help the battery? I am trying to figure out how to lower it to around 883 MHz for the purpose of saving battery? I am using Trickster Mod btw
Optimus DE v2.3 rom
Furnace 2.2.3 kernel
dorimanx kernel and its STweaks app
it doesnt go below 960mhz, but it can be disabled
60nine said:
dorimanx kernel and its STweaks app
it doesnt go below 960mhz, but it can be disabled
Click to expand...
Click to collapse
Thanks will give it a try with this rom, usually doesn't help me with battery life but I will give it a shot! Will report back how it goes. By chance do you know how big of a difference letting the kernel and rom settle for a few days makes?
dunno... what are your expectations on battery life?
with dorimanx kernel the results are usually more noticeable after a charge or two
60nine said:
dunno... what are your expectations on battery life?
with dorimanx kernel the results are usually more noticeable after a charge or two
Click to expand...
Click to collapse
A minimum of 5 hours screen on time... But yeah guess im gonna have to wait a charge or two to see the full effects.
Can you suggest a good settings combination for battery life? Just flashed v5.0 of Dori:silly:
read a few pages back on dorimanx kernel thread, someone posted good overall battery kernel settings, but wait for an 5.x update because something needs to be fixed in alucard governor...
btw STweaks app also has preloaded profiles you can change if you don't want to fiddle with the settings manually...
have fun
60nine said:
read a few pages back on dorimanx kernel thread, someone posted good overall battery kernel settings, but wait for an 5.x update because something needs to be fixed in alucard governor...
btw STweaks app also has preloaded profiles you can change if you don't want to fiddle with the settings manually...
have fun
Click to expand...
Click to collapse
I went about 10 pages back, could you by chance post a link or tell me what page number it was on? I saw screen shots on someones battery life but not settings.
i don't know the exact page, i'd have to search it too...
btw don't be lazy, you can test several settings in stweaks yourself. or use predefined ones... many people find the default ones good enough but not all of us use the phone the same way...
cheers
Hey guys.
I have a clean Mahdi ROM (the latest from like 1 week ago) and have the feeling that the battery drains slightly faster than in stock. Apart from other things I started trying different kernel tweaks and I discovered the following:
The governor, although showing explanations for a whole 7 different modes, only allows me to either pick "interactive" or "performance".
Since I never really need the CPU settings from interactive mode, I actually want to use conservative.
How can I realise that now?
Please feel free to post your battery life stats, I'm really curious.
Sidenote: I have "transparent weather clock" on my homescreen and it seems to need a lot of battery. Does anyone have a recommendation for a lightweight & goodlooking homescreen widget?
The kernel for that ROM only contains two governors, please do not use performance because it only uses your max frequency, which is bad for temp & battery life.
Ace42 said:
The kernel for that ROM only contains two governors, please do not use performance because it only uses your max frequency, which is bad for temp & battery life.
Click to expand...
Click to collapse
Ok, thanks for the info. I wondern why it only contains those two though.
I'd never use performance, interactive already provides more power than I need.
I'm just looking for a way to actually use the conservative mode.
Something weird just happened to me: my phone was at about 38% and when I looked 1h later, it was pretty warm and powered off 1min later because battery had dropped to 1%.
I think this is pretty weird. I did not use the phone in that hour and had no apps running.
As illogical it might sound, my first suspect was the energy saving mode I enabled. I dont know why but I think it messed something up.
Does anyone have similar issues or any useful advice for me?
w00ZzL said:
Ok, thanks for the info. I wondern why it only contains those two though.
I'd never use performance, interactive already provides more power than I need.
I'm just looking for a way to actually use the conservative mode.
Click to expand...
Click to collapse
The developer believes those to be the best choices, I have no clue why. Interactive mostly stays near the max freq & makes my phone uber hot like an oven. Feel free to use Render kernel, its in the general section.
w00ZzL said:
Something weird just happened to me: my phone was at about 38% and when I looked 1h later, it was pretty warm and powered off 1min later because battery had dropped to 1%.
I think this is pretty weird. I did not use the phone in that hour and had no apps running.
As illogical it might sound, my first suspect was the energy saving mode I enabled. I dont know why but I think it messed something up.
Does anyone have similar issues or any useful advice for me?
Click to expand...
Click to collapse
I've never experienced that, are you on the latest nightly?
Transmitted via Geass
Ace42 said:
The developer believes those to be the best choices, I have no clue why. Interactive mostly stays near the max freq & makes my phone uber hot like an oven. Feel free to use Render kernel, its in the general section.
Click to expand...
Click to collapse
Do you have Render kernel? If yes which governor mode are you using?
Ace42 said:
I've never experienced that, are you on the latest nightly?
Click to expand...
Click to collapse
I'm on the version from 6-28 and patch V6 which should be the latest?!
w00ZzL said:
Do you have Render kernel? If yes which governor mode are you using?
I'm on the version from 6-28 and patch V6 which should be the latest?!
Click to expand...
Click to collapse
That is the latest, I'm currently using Render kernelon 6-28 with ondemand.
http://forum.xda-developers.com/lg-g2/development/kernel-render-kernel-aosp-lg-roms-t2803929/page5
Ace42 said:
That is the latest, I'm currently using Render kernelon 6-28 with ondemand.
http://forum.xda-developers.com/lg-g2/development/kernel-render-kernel-aosp-lg-roms-t2803929/page5
Click to expand...
Click to collapse
Thanks for bringing that kernel up, I've flashed it yesterday and am delighted. Will try the release from today now.
BTW my low battery life is gone now so thanks again.