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Could some give me a quick rundown on undervolting a kernel. I'm using faux's 0.4.2 oc/uv cm7 kernel. From my understanding its already undervolted but I'm confused about whether I should/can adjust those settings for better results or if I should leave them alone.
Info greatly appreciated.
Sent from my LG-P999 using xda premium
Each chip is built differently, so you have to experiment on that yourself. That kernel may already be undervolted but it may not be right for you. I say adjust until you hit instability and then go from there.
tweeklulz said:
Each chip is built differently, so you have to experiment on that yourself. That kernel may already be undervolted but it may not be right for you. I say adjust until you hit instability and then go from there.
Click to expand...
Click to collapse
Sorry to jump in on this thread as well, but could you give us some info on how you would undervolt a kernel?
I have setcpu installed, is that enough? Is it possible to break my phone?
barqers said:
Sorry to jump in on this thread as well, but could you give us some info on how you would undervolt a kernel?
I have setcpu installed, is that enough? Is it possible to break my phone?
Click to expand...
Click to collapse
Yes anytime you make you phone do something it didn't do from the factory there is a chance you could damage your device..its thx to all the great devs and people that test that make it easier and less likely also the more you read and understand what it is you are actually doing to the device helps alot!
If you have a kernel able to be overclocked/undervolted yes just use set CPU to adjust the settings.
All chips are different just cause a specific setting is working for someone else means it will work the same for you!
That being said I use:
Trigger 8/22 rom with faux123'a 0.4.2 kernel.
My settings:
Max-1408mhz
Min-389mhz
And have 1.1 GHz down to 389 mhz undervolted by 50 and no undervolt above 1.1
also have different profiles set for screen off and in call..
Good luck how this helps..
Sent from my LG-P999 using xda premium
MisfitX said:
Yes anytime you make you phone do something it didn't do from the factory there is a chance you could damage your device..its thx to all the great devs and people that test that make it easier and less likely also the more you read and understand what it is you are actually doing to the device helps alot!
If you have a kernel able to be overclocked/undervolted yes just use set CPU to adjust the settings.
All chips are different just cause a specific setting is working for someone else means it will work the same for you!
That being said I use:
Trigger 8/22 rom with faux123'a 0.4.2 kernel.
My settings:
Max-1408mhz
Min-389mhz
And have 1.1 GHz down to 389 mhz undervolted by 50 and no undervolt above 1.1
also have different profiles set for screen off and in call..
Good luck how this helps..
Sent from my LG-P999 using xda premium
Click to expand...
Click to collapse
Thank you for such a detailed explanation! I'll be more weary of fooling around with settings. I'll probably set mine similar to yours.
Thanks everyone. I understood that setcpu would be used for the changes I was more wondering what the changes would do. Like undervolting by 50 for instance, what does that give as far as battery life? Im a moderate to heavy user and I only get roughly 8 hours off the charger before it needs to be back on, great signal all day too.
I suppose I'll just have to tinker with it till I get crashes then adjust from there.
Sent from my LG-P999 using xda premium
wgrant said:
Thanks everyone. I understood that setcpu would be used for the changes I was more wondering what the changes would do. Like undervolting by 50 for instance, what does that give as far as battery life? Im a moderate to heavy user and I only get roughly 8 hours off the charger before it needs to be back on, great signal all day too.
I suppose I'll just have to tinker with it till I get crashes then adjust from there.
Sent from my LG-P999 using xda premium
Click to expand...
Click to collapse
How do u get the undervoltage adjustment? i have set cpu and when i try the voltage button on set cpu, i got forced closed. Thanks in advance.
Sounds like a bad install, try uninstalling setcpu then re-installing it or fix permissions in CWM or terminal
su
fix permissions
Used to have that issue too. Try the setcpu available here on the forums, I think that's the one the worked for me.
Sent from my LG-P999 using xda premium
This is for people to lazy to start their own thread so please post here.
wrecless said:
I use Tegrak OC Pro with these settings.
Press optimization and enter these values.
level 0= 1200 - 1325 - 1100
level 1= 800 - 1075 - 1050
level 2= 400 - 1000 - 1000
level 3= 200 -900 - 980
level 4= 100 - 850 - 950
Make sure scaling is set to ondemand and set on boot is selected.
Then press Tweaks and make sure Io scheduler is set to deadline and
tweaks on boot is selected.
I got these settings from the thread linked below. (THANKS)
I have been using these settings for a few months with adrenaline shot on many different ROMS and I get at least 2 days battery life with regular use and my quad scores are 3000+. Phone never reboots, freezes, or gets hot.
I cant guarantee you will all have the same results but it mite be worth a try.
http://forum.xda-developers.com/showthread.php?t=1214314
Click to expand...
Click to collapse
Just a quick note, be sure you test these settings out before you select set on boot or you may have some issues. Every phone is slightly different in its own way and these undervolt settings may be too low and cause instability. I've personally had to increase these voltages slightly (in the past) for stability reasons.
If you guys want to save some time and effort download my attachment, unzip it, then place it inside tegrak/overclock on your SD. Itll be loaded then into your profiles on tegrak, just select it from the list and whamo, 1.2ghz oc with undervolt settings.
tehgyb said:
Just a quick note, be sure you test these settings out before you select set on boot or you may have some issues. Every phone is slightly different in its own way and these undervolt settings may be too low and cause instability. I've personally had to increase these voltages slightly (in the past) for stability reasons.
If you guys want to save some time and effort download my attachment, unzip it, then place it inside tegrak/overclock on your SD. Itll be loaded then into your profiles on tegrak, just select it from the list and whamo, 1.2ghz oc with undervolt settings.
Click to expand...
Click to collapse
Uhh are the settings different in your attachment?
wrecless said:
Uhh are the settings different in your attachment?
Click to expand...
Click to collapse
Very slightly, its a 1.2GHz oc,.and I had to up the voltages a little for stability... Nothing too too major
Sent from my SGH-T959V using XDA App
tehgyb said:
Very slightly, its a 1.2GHz oc,.and I had to up the voltages a little for stability... Nothing too too major
Sent from my SGH-T959V using XDA App
Click to expand...
Click to collapse
Dont up the voltages and post some attachment like its the same thing when its not. I'v been using these setting for 3 or 4 months thats why I posted them. If you like yours better post your own thread.
Jeez you mad or something? Lol
its based on the same thing and I only upped them for stability. I've also been using them for like 3 months. I don't see your problem here.
Sent from my SGH-T959V using XDA App
wrecless said:
Dont up the voltages and post some attachment like its the same thing when its not. I'v been using these setting for 3 or 4 months thats why I posted them. If you like yours better post your own thread.
Click to expand...
Click to collapse
Lol wtf? He never claimed them to be the same. He clearly stated it was the settings for 1.2ghz. He wasn't doing anything wrong here, you wanted to share your settings and he wanted to share his. What's wrong with this forum.
Sent from my SGH-T959V using XDA App
And yet he even states he got those values from another poster.
Sent from my SGH-T959V using Tapatalk
ok my bad let's make it a post your tegrak settings thread. So please everyone post your Tegrak settings thanks.
wrecless said:
This is for people to lazy to start their own thread so please post here.
Click to expand...
Click to collapse
we dont need a bunch of different threads for settings, quit acting self righteous
Sent from my SGH-T959V using XDA App
wrecless said:
ok my bad let's make it a post your tegrak settings thread. So please everyone post your Tegrak settings thanks.
Click to expand...
Click to collapse
Temper tantrum much? Sheesh man I was just helping you out...
Sent from my SGH-T959V using XDA App
undervolted 1.4 anyone? i could use an extra .1 ghz hehe
I use dsexton702's suggestions found here: http://forum.xda-developers.com/showthread.php?t=1294815
7TimesCursed said:
unde
rvolted 1.4 anyone? i could use an extra .1 ghz hehe
Click to expand...
Click to collapse
Here's what I've been using for awhile now
Somairotevoli said:
Here's what I've been using for awhile now
Click to expand...
Click to collapse
what rom are you using?
mikhail777 said:
what rom are you using?
Click to expand...
Click to collapse
Mine, simplysimple
Sent from my SGH-T959V using Tapatalk
Somairotevoli said:
Mine, simplysimple
Sent from my SGH-T959V using Tapatalk
Click to expand...
Click to collapse
Sweet settings. How stable has the phone been and how's the battery life as well? Thx
Stable as stock. Battery life
excellent.
Sent from my SGH-T959V using Tapatalk
Somairotevoli said:
Here's what I've been using for awhile now
Click to expand...
Click to collapse
Thanks!! Been searching forever haha
Somairotevoli said:
Here's what I've been using for awhile now
Click to expand...
Click to collapse
nice man! If you have it in a profile you can copy it from tegrak/overclock and post it like I did for other users to simply copy it to the same location, if you wanted ;P
Sent from my SGH-T959V using XDA App
I have seen some talk about Voltage control in the dev thread and I am a little confused as to what it is they are doing. I do understand they are using the Voltage Control app and that you can set the min and max. When they start referring to under volting to 125 I am not seeing how they do that.
How are they setting it for 125? I have a feeling I am just looking at the surface and not seeing anything past that.
klturi421 said:
I have seen some talk about Voltage control in the dev thread and I am a little confused as to what it is they are doing. I do understand they are using the Voltage Control app and that you can set the min and max. When they start referring to under volting to 125 I am not seeing how they do that.
How are they setting it for 125? I have a feeling I am just looking at the surface and not seeing anything past that.
Click to expand...
Click to collapse
They minus (undervolt) each frequency by 125. It's in the Voltage section of the app. It will list the frequencies in there from 100-1200 or to 1600if the kernel supports it. So basically undervolting will use less battery when it hits those frequencies.
Sent from my SGH-I997
If you're going to try it, read up on it, you can have random reboots if set wrong. People say to stress test before leaving a setting.
Sent from my SGH-I997
Awesome! I thought it was something super simple I just wasnt putting 2 and 2 together so to speak. I am going to give it a whirl.
If you have tinkered with VC, what are the settings that have worked best for you?
I'm OC to 1.6, and UV's at -100 across the board, and running great!
klturi421 said:
Awesome! I thought it was something super simple I just wasnt putting 2 and 2 together so to speak. I am going to give it a whirl.
If you have tinkered with VC, what are the settings that have worked best for you?
Click to expand...
Click to collapse
It all depends per device. For example, my settings may not work well with your device. Really test it out first before you save the settings on boot. I'll link you the thread that explains it more.
Sent from my SGH-I997
Here. It's in his second post
http://forum.xda-developers.com/showthread.php?p=18549017
Sent from my SGH-I997
This is mine:
Sent from my SAMSUNG-SGH-I997 using xda premium
I tried to reply to the main thread in the development thread for SynergyROM, but as I do not have the 10 posts required, I figured I'd put it here. If this is against the rules, please let me know and remove this.
Apparently the busybox install on 1.4 is a little botched, and as such, when you install LeanKernel 12.2, it doesn't run the scripts it needs to in order to run it's magic.
All you need to do to get it to work again is fix the install of busybox on your phone. You can download busybox from the Play store and install it to your phone, and after that, installing the kernel should be relatively easy.
I've been running 12.2 on my phone for the better part of today at work and have had no issues with it at all.
I'd attach a link as proof, but apparently I can't do that either.
This is what I did too and it's working wonders.
Sent from my SCH-I535 using Tapatalk 2
Good News on Thx 4 the post
jrichards2007 said:
I tried to reply to the main thread in the development thread for SynergyROM, but as I do not have the 10 posts required, I figured I'd put it here. If this is against the rules, please let me know and remove this.
Apparently the busybox install on 1.4 is a little botched, and as such, when you install LeanKernel 12.2, it doesn't run the scripts it needs to in order to run it's magic.
All you need to do to get it to work again is fix the install of busybox on your phone. You can download busybox from the Play store and install it to your phone, and after that, installing the kernel should be relatively easy.
I've been running 12.2 on my phone for the better part of today at work and have had no issues with it at all.
I'd attach a link as proof, but apparently I can't do that either.
Click to expand...
Click to collapse
Thx for your post and gr8 find on the busybox
I have been trying to decide which one to load
SynergyROM 1.3
or
SynergyROM 1.5
Now I know that imo 12.2 will work
long as the busybox is loaded first.
due to the issues with 12.2 loop booting.
Now I can load 1.4 will let you know how it goes.
Thanks Again.
Cheers,
Azbobs
Worked for me too
Worked for me as well. Thanks for the post.
Sent from my Sammy Galaxy S3 using Tapatalk 2
Where is the kernel thread??
Ill give this a shot today.
Any sense as to battery life with the new kernel??
Sent from my SCH-I535 using xda premium
mpetruzz said:
Where is the kernel thread??
Ill give this a shot today.
Any sense as to battery life with the new kernel??
Sent from my SCH-I535 using xda premium
Click to expand...
Click to collapse
http://rootzwiki.com/topic/31329-imoseyon-test-leankernel-tw-82-v122-kexec/
mpetruzz said:
Where is the kernel thread??
Ill give this a shot today.
Any sense as to battery life with the new kernel??
Sent from my SCH-I535 using xda premium
Click to expand...
Click to collapse
^ Also would like to know this. I was seeing some signs of worse battery life on 1.4. I'd like to know if the kernel + 1.4 is better battery life.
SightSeeker said:
^ Also would like to know this. I was seeing some signs of worse battery life on 1.4. I'd like to know if the kernel + 1.4 is better battery life.
Click to expand...
Click to collapse
I am running Imoseyons 12-2 kernel with the cpu editor script using battery saver and notice a considerable difference in battery life.
http://forum.xda-developers.com/showthread.php?t=1584508
Earl831SC said:
I am running Imoseyons 12-2 kernel with the cpu editor script using battery saver and notice a considerable difference in battery life.
http://forum.xda-developers.com/showthread.php?t=1584508
Click to expand...
Click to collapse
Do you know what exactly it is scaling at? Also what does the 12-2 kernel do vs the script? Does the kernel alone underclock?
SightSeeker said:
Do you know what exactly it is scaling at? Also what does the 12-2 kernel do vs the script? Does the kernel alone underclock?
Click to expand...
Click to collapse
The battery saver from the script sets the max frequency on the cpus to 1134000. This can be changed in the script as well. I run the batter saver but change the max frequency to 1350000 for both cores. I do not believe the kernel has underclocking abilities currently, but I may be wrong. Definitely snappier with the kernel than without. The combination of the two is excellent.
Earl831SC said:
The battery saver from the script sets the max frequency on the cpus to 1134000. This can be changed in the script as well. I run the batter saver but change the max frequency to 1350000 for both cores. I do not believe the kernel has underclocking abilities currently, but I may be wrong. Definitely snappier with the kernel than without. The combination of the two is excellent.
Click to expand...
Click to collapse
Do you know if the sticky mode works?
SightSeeker said:
Do you know if the sticky mode works?
Click to expand...
Click to collapse
My setting stay after rebooting so yes. I check with system tuner pro.
After flashing this kernel over Synergy 1.4, I have a blue led light that will not turn off. Any ideas?
Sent from my Galaxy S3 using xda app-developers app
12bravo said:
After flashing this kernel over Synergy 1.4, I have a blue led light that will not turn off. Any ideas?
Sent from my Galaxy S3 using xda app-developers app
Click to expand...
Click to collapse
You may have accidentally flashed the v12 of the kernel. On the thread on rootzwiki look under changelog and download v12.2 it should fix the LED issue.
Want to post in the synergy thread but now enough post counts -_-
Anyone can think of a compelling reason to not jump for synergy 1.4 with the lean kernel 12.2 and wait for synergy 1.5 instead? Eschelon made it sound like it would drop soon and I'm just trying to gauge from the comments on the synergy thread if there are major problems.....main things that bother me are battery life degradation claims and 4G speed variances.
Bonus: A tad off topic, but I was wondering if anyone running the synergy roms replaced their touchwiz apps with aosp apps? Reason I ask is because I cannot live without the ICS email client and prefer the messaging client as well.
Thanks for the heads up from everyone confirming the busybox issue with 1.4 to be compatible with 12.2 lean kernel.
sensui123 said:
Want to post in the synergy thread but now enough post counts -_-
Anyone can think of a compelling reason to not jump for synergy 1.4 with the lean kernel 12.2 and wait for synergy 1.5 instead? Eschelon made it sound like it would drop soon and I'm just trying to gauge from the comments on the synergy thread if there are major problems.....main things that bother me are battery life degradation claims and 4G speed variances.
Thanks for the heads up from everyone confirming the busybox issue with 1.4 to be compatible with 12.2 lean kernel.
Click to expand...
Click to collapse
If you want to play around with Google Now then go for 1.4. 1.5 will not require a wipe according to eschelon. I've found the battery life on 1.4 to be close to par with 1.3. Maybe a little more battery hungry, but not much.
Earl831SC said:
The battery saver from the script sets the max frequency on the cpus to 1134000. This can be changed in the script as well. I run the batter saver but change the max frequency to 1350000 for both cores. I do not believe the kernel has underclocking abilities currently, but I may be wrong. Definitely snappier with the kernel than without. The combination of the two is excellent.
Click to expand...
Click to collapse
I set cpu0 to 1350000, but I can't figure out how to set cpu1? I am new to kernels, can you tell me how you set the second cpu to 1350000?
Sent from my SCH-I535 using xda app-developers app
tmar23 said:
I set cpu0 to 1350000, but I can't figure out how to set cpu1? I am new to kernels, can you tell me how you set the second cpu to 1350000?
Sent from my SCH-I535 using xda app-developers app
Click to expand...
Click to collapse
If you are using the script it is option 4 to set max frequency for CPU1
Thanks, I had to force dual core mode for some reason, then it gave me the ability to change cpu1.
Sent from my SCH-I535 using xda app-developers app
Hi guys, I was wondering how you test the stability of your undervolting. I have been using StabilityTest but even though I always pass the stress test I know that the phone is unstable because it sometimes reboots.
maps ambering
nor-ric said:
Hi guys, I was wondering how you test the stability of your undervolting. I have been using StabilityTest but even though I always pass the stress test I know that the phone is unstable because it sometimes reboots.
Click to expand...
Click to collapse
Hey,
Did you manage to undervolt the phone, and it is stable?
Could you publish the voltages?
Also, which ROM, Kernel and governor do you use?
Thanks, Nir
I have s4 processor, on 2.15 hboot s off, running viper one s 2.2 and I went down like 75mv at lowest cpu frequency and 50mv across the board and had no problems at all in a month at least.
I didn't try any lower than that cause I'd rather not push it.
Sent from my HTC One S using xda app-developers app
---------- Post added at 05:38 PM ---------- Previous post was at 05:36 PM ----------
I tried the set cpu stress test once I think and passed but I've owned the phone for a couple months now and never had a random reboot so that's the true test I guess.
Sent from my HTC One S using xda app-developers app
Nirosss said:
Hey,
Did you manage to undervolt the phone, and it is stable?
Could you publish the voltages?
Also, which ROM, Kernel and governor do you use?
Thanks, Nir
Click to expand...
Click to collapse
I'm on the stock (well, modded by me ) ICS 4.0.4 rom, Bricked kernel, intellidemand governor. I managed to undervolt quite well and I can say it's stable at 1,1V @1,5GHz. I could probably go a bit lower but I still don't know because I haven't find a good stress test which I can rely on. At 1,1V I have no random reboots, though.
350Rocket said:
I have s4 processor, on 2.15 hboot s off, running viper one s 2.2 and I went down like 75mv at lowest cpu frequency and 50mv across the board and had no problems at all in a month at least.
I didn't try any lower than that cause I'd rather not push it.
Sent from my HTC One S using xda app-developers app
---------- Post added at 05:38 PM ---------- Previous post was at 05:36 PM ----------
I tried the set cpu stress test once I think and passed but I've owned the phone for a couple months now and never had a random reboot so that's the true test I guess.
Sent from my HTC One S using xda app-developers app
Click to expand...
Click to collapse
Yes, I have tried setcpu too. But I always pass every test even if I know the phone is unstable...
Could you please check your voltage value at 1,5GHz?
Thanks!
1150mv at 1.5ghz
Sent from my HTC One S using xda app-developers app
---------- Post added at 10:58 PM ---------- Previous post was at 10:56 PM ----------
I'm going to switch kernels soon though cause of double tap to wake, keeps waking in my pocket and every reboot it reenables and I have a hard time getting the setting to save as 0.
Sent from my HTC One S using xda app-developers app
I just switched to elementalX kernel for the options on first boot. Disabled dtw and enabled s2w enabled lowest cpu idle (192) and 800mv idle undervolting.
So far so good, seems like my phone is not picky at all. I've actually never had it act up on anything so far, knock on wood.
I have it overclocked to max 1.8ghz now too.
Sent from my HTC One S using xda app-developers app
You can probably go lower than 1150mv @1,5GHz. I don't see any major benefit in battery life, though. The most important effect is the cpu temperature, especially now that's summer.
You were right, I went down further to [email protected] and lowered it equally almost across the board. Still no issues.
Sent from my HTC One S using xda app-developers app
It seems the only way to safely undervolt is trial and error...
I've now undervolted the lowest frequency (192mhz with my kernel) down to 700mv (the minimum allowed) and will see if it's stable.
So far it's stable. 700mv @ 192MHz!
Same here, no problem so far
Sent from my HTC One S using xda app-developers app
To cope with the summer, I've set the frequency to 1242MHz (instead of 1500MHz) and downvolted to 900mv! So huge of a downvolt, if you think that 1500Mhz requires 1,1V. :cyclops:
The user inteface is as smooth as before, no lags at all.
nor-ric said:
To cope with the summer, I've set the frequency to 1242MHz (instead of 1500MHz) and downvolted to 900mv! So huge of a downvolt, if you think that 1500Mhz requires 1,1V. :cyclops:
The user inteface is as smooth as before, no lags at all.
Click to expand...
Click to collapse
I just tried going down to 925mv at 1242mhz, but I still have max cpu at 1.5ghz, tried to lower it somewhat even across the board without going too low but ended up with a freeze/reboot under load so I have to try higher than that.
I can say that mine is stable at 900mV @1242MHz. It's been weeks without a crash, so far. If your sample is a bit unlucky it's likely that it will be stable at 25-50 mV higher than mine, not bad after all.
I did just that and so far no issues. Thanks
Sent from my HTC One S using xda app-developers app
does anyone actually get any tangible benefits from undervolting? It can't be much more than 2-3 degrees. How much battery percentage is saved on a full charge? how many more minutes do you get?
I can't say at all. My usage is never the same one day to the next and I've been using different ROMs since I started under volting. I will try to check overnight drain with stock vs under volted soon.
Sent from my HTC One S using xda app-developers app
I can't say, either. Nothing that's going to change your life, about battery life. About the temperature I haven't tested in a scientific way, but I can say that now it's cool even if the weather is really hot (30-35°).