So no matter what kernel I use, when ever i use SetCpu (or overclock widget) to underclock my phone when the screen is off it causes the phone to freeze and I have to pull the battery out. I set it so that it goes down to 200mhz, tried 400mhz and experienced the same problem. Any ideas? Solutions?
rockethot said:
So no matter what kernel I use, when ever i use SetCpu (or overclock widget) to underclock my phone when the screen is off it causes the phone to freeze and I have to pull the battery out. I set it so that it goes down to 200mhz, tried 400mhz and experienced the same problem. Any ideas? Solutions?
Click to expand...
Click to collapse
More info.. What rom are you running? Are you sure your rooted? What settings are you applying?
I have not had any issues yet with setcpu and my screen being off
rjmjr69 said:
More info.. What rom are you running? Are you sure your rooted? What settings are you applying?
I have not had any issues yet with setcpu and my screen being off
Click to expand...
Click to collapse
I'm running Baked Snack 1.1, doesn't matter what rom or kernel I use though, it still happens.
It doesn't matter if I use overclock widget or SetCpu, if I were to set it so that my phone underclocks to 200mhz or 400mhz while the screen is off it freezes and I have to pull the battery.
Same here im running stock and i've tried setcpu and no matter what i hav to pull the battery out everytime. So i uninstalled it.
Sent from my Epic 4G
I had the same problem set the cpu with min of 400 and max off 800 should fix your problem
Sent from my SPH-D700 using XDA App
It means that there is not enough voltage run that frequency on your phone. Some times these kernel developers undervolt the phone which all phone don't support at all. Try some other kernel like the xtreme kernel. That kernel actually work for me and I can underclock my phone without freezing.
rockethot said:
So no matter what kernel I use, when ever i use SetCpu (or overclock widget) to underclock my phone when the screen is off it causes the phone to freeze and I have to pull the battery out. I set it so that it goes down to 200mhz, tried 400mhz and experienced the same problem. Any ideas? Solutions?
Click to expand...
Click to collapse
wow.. i just posted something like this i had set cpu installed since i rooted my phone last week. today i was playing with the settings because my music was stuttering.. i thought it might be a underclockign problem so i changed the profile to "ondemand" it made the stuttering better and everything seemed fine. about 12 hours later i got home and was playing with the phone. i updated 3 programs in market and all of a sudden my phone would go to sleep and not wake up. had to do a battery pull. i uninstalled the 3 programs i updated but the problem kept going. just uninstalled setcpu. hopefully it resolves everything
using epic experience
murso74 said:
wow.. i just posted something like this i had set cpu installed since i rooted my phone last week. today i was playing with the settings because my music was stuttering.. i thought it might be a underclockign problem so i changed the profile to "ondemand" it made the stuttering better and everything seemed fine. about 12 hours later i got home and was playing with the phone. i updated 3 programs in market and all of a sudden my phone would go to sleep and not wake up. had to do a battery pull. i uninstalled the 3 programs i updated but the problem kept going. just uninstalled setcpu. hopefully it resolves everything
using epic experience
Click to expand...
Click to collapse
The use of profiles is not recommended on Galaxy S phones. The developer of SetCPU actually does not recommend using any other governor than conservative, even though we've been able to make Interactive work on some kernels.
I'm running Baked Snack 1.3 and found it to be stable at 1.2ghz using OC Widget. With screen on I have it set to min 400 and max 1200. With screen off it's set to min 400 max 600.
I too am having this problem. No mater what rom or kernal I use. It seems as if Setcpu and Overclock widget sometimes cant read the frequencies and let the phone underclock to 19.2Mhz which is probably like trying to wake the dead!
I wonder if it has anything to do with the new Superuser.apk? it always seems like setcpu is trying to get permissions. Maybe, I dont really know. Can one of you really smart people look into this?
In the meantime the only profile that I have set is screen off Max 800 Min 400, maybe that will work?
same issues here. i'm running with my screen off at min 100 and a max of 800. If i change my max to anything lower, my phone won't wake up. I'm running the latest VIPERrom. I'm hearing some mixed feedback about this app so i would like hear your feedback.
What i've gathered over the last several months, is that SetCPU profiles are buggy with our phone. Its recommended not to use profiles.
I'm fairly certain that SetCPU should not be used without a custom kernel that allows for over/under clocking. If you're on the latest ViperROM then you are using a kernel that we have no source code for, therefore it doesn't support over/under clocking; rendering SetCPU useless and prone to cause problems.
mattallica76 said:
The use of profiles is not recommended on Galaxy S phones. The developer of SetCPU actually does not recommend using any other governor than conservative, even though we've been able to make Interactive work on some kernels.
Click to expand...
Click to collapse
My SetCPU is using conservative and I haven't had any problems so far. I am running BonsaiROM 1.14.
jemarent said:
same issues here. i'm running with my screen off at min 100 and a max of 800. If i change my max to anything lower, my phone won't wake up. I'm running the latest VIPERrom. I'm hearing some mixed feedback about this app so i would like hear your feedback.
Click to expand...
Click to collapse
If you have it set to under 200 with the screen off it won't wake up after a while.
I've had the same problem on all builds and ROMs that I've used. The only constant through all the different setups I've used were Advanced Task Killer and SetCPU. I stopped using ATK (with auto-kill on screen off, I use EStaskmanager for manual killing when phone is on) and the problem seems to be mostly fixed. It does still happen once in a blue moon though, say once every day or two.
Phoenix Kernel/Syndicate ROM 2.1
SetCPU: 100min/1200max
Screen off: 100min/200max
Batter < 30%: 100min/600max
I didnt want to root my phone HTC WILDFIRE because I am a little noob at these things a I thought I would totally destroy my phone.
But I found out that it is not so hard to root it as I thought, so today I succesfully rooted my phone. Than I wanted to overclock my procesor from 528 Mhz to I think 768 by downloading new kernel etc... Everything went good. I succesfully installed(or what, I said I am a little noob) that new kernel and was happy that my Wildfire will be faster.
But now I can see that my phone is lagging more, sometimes it freezes what i couldnt see before when It had original kernel.
HOW IS IT POSSIBLE?
Pls help
Do you have SetCPU installed? Then turn it a bit down, till 690~710 Mhz
Maxing it totally out can make your phone unstable. Think about it like a car, when it has 100 hp's and you tune it to 150 hp's things might break.
From stock 528 to 768 isn't a walk in the park, it's +45%
Yes I have setCPU and when I set my procesor to about 710 Mhz it lags and freezes. When I set it to about 580 it is doing the same. The only one solution of this I think is to reinstal the kernel.
Now I have 2.6.32.21-HCDRJacob-ga91 e 73b- [email protected] 1.
That is the full name of it. And in setcpu info it shows me before the version ( 2.6.32.21-HCDRJacob-ga91 e 73b- [email protected] 1) Linux versio... Maybe thats the problem???
And I have to find some solution as fast as possible because sometimes when somebody calls me I cant answer because of a biiiig lag. And then I cant do anything.
Thx for help
What id the minimum speed set to? I wouldn't go below 160. And my max is 672mhz.
Are you running different profiles or just the main profile in setCPU? Mine used to lag when i had a few profiles running but i have removed them all and only using the main profile and the lag has now gone.
when i went to wildpuzzle i found whatever speed i set my processor through set cpu it froze about 4-5 times a day. after flashing the kernel to remove overclocking it has not frozen in a week. everything really responsive, checking auto detect speeds with set cpu shows max 528mhz min450mhz
I tried many options and at last its OK. firstly I had a big difference between max and min of my procesor at setCPU, so I tried to set it to min about 630 and max about 700.
Now it is OK I dont know how, but I am happy the ****y problem is somehow solved and everytjing now goes very smoothly, thx u all
ephbee said:
when i went to wildpuzzle i found whatever speed i set my processor through set cpu it froze about 4-5 times a day. after flashing the kernel to remove overclocking it has not frozen in a week. everything really responsive, checking auto detect speeds with set cpu shows max 528mhz min450mhz
Click to expand...
Click to collapse
So what kernel did you flash it to?
Just as the title says, but here's some more details.
I have my cpu set to 1.1Ghz during the normal day 245Mhz min.
I have my widget on my homescreen and a custom profile set for when the screen is off for 368max and 245min.
When I turn my screen on and unlock it, it lags on my screen and says 368 max, then it jumps to the 1.1 and everything is fine.
It seems to lag there longer than it used to, has anyone else noticed this problem.
I used to have Pershoots Kernel on 6.1, do you think if I put Pershoots Kernel back on it will eliminate the lag and switch to 1.1 faster than it does now?
Just some thoughts and advise would be great, thanks guys.
Sent from my HTC Vision using XDA App
I would ditch setCPU and use CM's built in overclocking settings. set your clock speed to whatever you like and use the ondemand governor.
your screen wake lag will almost certainly disappear and I bet your battery life doesn't change a bit. you can play around with it, of course, and find what's best, but I have found that since CM introduced built-in overclocking, it is more functional to use it instead of setCPU. my battery life hasn't changed a bit, partly because when the phone is in an idle state it is underclocked by default, and also because I don't have setCPU constantly having to think to make changes to my clock speeds and governors based on what profiles I've set up.
Hello.
Undervolting your CPU has always been a daunting task - there's so many CPU steps, if you pick say -100mV to all frequency steps and you get a reboot, how do you work out which step (or steps!) is causing the problem? If you undervolt -25mV on one frequency, then wait a couple of days to make sure it's stable, then reduce the same frequency by another 25mV.. you'll still be undervolting a year later.
This thread is my tutorial on how to do a best effort at quickly and safely undervolting your phone CPU.
First of all - is undervolting your CPU worth it?
Initially it was thought not to make much difference, but after some serious testing (thanks AndreiLux), "we" decided that it was a good idea. I also did my own basic testing, and it looks like it's worth it.
What are the advantages of undervolting?
Better battery life
Cooler phone, especially useful if you overclock your CPU
What are the disadvantages of undervolting?
That's the great thing! Really the worst that can happen is your phone freezes or reboots. The steps below should eliminate all of that. Once you have undervolted your CPU to just above its freeze/crash levels, there are no disadvantages!
Note: I have had some minor data loss (eg an app forgets a setting) after an undervolting related crash, but it was rare and I believe has to do with the Perseus kernel "Enable dynamic FSync" setting. I note below how to mitigate against this.
What do you need?
A rooted phone, and a kernel that supports undervolting. Perseus and Siyah will work, but any kernel should be fine that supports SetCPU's undervolting schema
SetCPU or you can use a combination of STweaks and Stability Test (use STweaks for setting the frequency and voltage, and use Stability Test's Classic Test for the stress test)
A paper and a pen - I used Sticky Notes as I was at a computer for most of the process
Some patience
Let’s begin.
Open SetCPU. You’ll be greeted by the Main screen which has the min/max CPU frequencies, the governor options, and the IO scheduler options. Reduce the max CPU frequency to the lowest step. On the SGS3 this will be reducing 1400MHz down to 200MHz, so you now have both the min and the max set at 200MHz. The phone will get pretty slow at this point. Ensure the Set on Boot option is unticked
Set the governor to Performance (note: you have to make sure all cores of your CPU are being used. In a complex kernel such as Perseus, you'll have to go into STweaks and set the CPU hotplug lock to 4 so all 4 cores are used. Also note there appears to be a bug in Perseus at the time of writing: you have to set the hotplug lock BEFORE you change the governor to performance)
Move to the Voltages screen
Ensure the Set on Boot option is unticked, and scroll down to the lowest setting, and change it to something low, like 700mV, and then apply it (click the third icon from the right at the top of the screen, a rectangle with a tick on it) . This first setting is always a bit of guess and check, and to be honest you’re hoping for the phone to freeze or crash on this first one. Has it frozen? If so move on to the next step. If not, reduce it by a further 25mV and apply again, repeat until your phone freezes or reboots.
So, you have undervolted too far. Reboot the phone, and perform steps 1-3 again. At step 4, use the voltage that crashed your phone +25mV (eg if it crashed at 675mV, this time set it to 700mV). Now, you have a very slow phone running a low voltage that doesn’t immediately crash it. Move on to the next step
An easy crash test I found was simply allowing the phone to go into deep sleep, and waking it up again. To do this, unplug your phone if it’s charging, and turn the screen off. At this point I usually wrote the time down on my piece of paper, as well as what frequency and voltage I was testing as I’m prone to forget these things. Wait 5 minutes with the screen off (and make sure no notifications have come in while the screen is off – this wakes the phone up and you’ll have to wait another 5 mins), then turn the phone on. You’ll know it’s gone into deep sleep as there’ll be a slight delay before the screen turns on as compared to no delay when turning it off and immediately back on again. If the phone doesn’t turn on, go to step 5. If your phone comes out of deep sleep OK, move on to the next step.
Now, we stress test. In SetCPU scroll over to the Info screen, and scroll down to the Stress Test option. Start it, and note down the time on your paper/Sticky Notes. Your CPU will now run as hard as it can at the current frequency. Let it run for 15-20 minutes. At the lowest frequency it will be pretty laggy and slow, if you think it has frozen always give it 30 seconds to see if it picks up again. If it gets stuck for over a minute, you probably have a crash. Go to step 5. If after 15-20 minutes it’s still running, you have found your first stable(ish) voltage for that frequency! At this point I saved the voltages in SetCPU by pressing the diskette icon. To ensure the changes are written to disk turn the phone screen off for 5 seconds then turn it back on again.
We are now ready for the next frequency. There’s pretty much no way a frequency will run stably on a lower voltage than a frequency below it, so our first voltage for the next frequency up should be the same stable voltage we found for the previous frequency. For example if we found a stable voltage of 725mV on the 200MHz frequency, our first test voltage for 300MHz should be 725mV. Write this down with the frequency on your paper. In the Main screen of SetCPU, change the max frequency to the next step up. Then, in the Voltages screen, adjust the voltage to be the same as the lower frequency, as discussed above. If your phone immediately freezes or reboots, move to the next step. If not, go to step 10.
So, you have undervolted too far, again! Reboot your phone, open up SetCPU, and in the main screen ensure the max frequency is set to the frequency we’re testing. Give the sliding bar things a jiggle to apply it. Ensure the governor is set to Performance by pressing it on the lower left part of the screen. Move to the Voltages screen, and you’ll either see your previous “saved” voltage values ready to be applied in dark grey under the “current” voltage settings, or you’ll have lost your “saved” voltage settings. If you have lost them, never fear; just restore the latest settings by clicking the first from the right icon at the top (a square with an arrow pointing outwards). Adjust the frequency we’re testing’s value to 25mV more than the value you last used when it crashed, and apply it. If it crashes immediately, repeat this step. If not, move on
We now start the two tests in steps 6 and 7 again, but this time if your phone crashes or freezes, go to step 9. If it completes the deep sleep and stress test tests, go to step 8 for the next frequency test.
Sorry for the complexity here, but it was the easiest way I could write it without repeating myself too much. The TL;DR version goes like this:
Pick the lowest untested frequency, set the max frequency to this and the governor to Performance, and find the lowest voltage that doesn’t immediately crash the phone
Put the phone into deep sleep, and see if it crashes. If it does, increase the voltage for the current frequency we’re testing by 25mV and test again. If not, move on
Run a stress test on the phone for 15-20 minutes. If it crashes, raise the voltage by 25mV and go to step B. If it doesn’t crash the current frequency is now tested. Go to step A
You now have a set of frequencies that shouldn’t immediately crash the phone. Set the min and the max frequencies back to normal, and set the governor back to your usual governor. At this point for me I was able to use the phone for about 2 hours before I had my first crash. How running a stress test on each frequency for 20 minutes didn’t pick up this crash situation I’m not sure, but it didn't.
After screwing around for a while I found the easiest solution was to just raise each frequency step by 25mV and then continue every day usage. That was enough to stabilise my phone. If it still crashes for you, keep raising all the values by 25mV until it settles down. After a day or two of no crashes you can start slowly one by one reducing each step by 25mV again to find out which step caused the crash.
After that, you should be done!
Ps I know there is another thread around here discussing undervolting, but I found it too vague on the details and sometimes wrong, so I thought I’d share my experiences in the hope it might help.
Good work!
Would you pls post your testing results for our reference?
Thanks.
Mod edit: please do not quote the OP.
A table with the running undervolting settings would be a great orientation help. Given that, people don't need to trail and error from scratch.
Sent from my Nexus 4 using xda app-developers app
me_max said:
A table with the running undervolting settings would be a great orientation help. Given that, people don't need to trail and error from scratch.
Sent from my Nexus 4 using xda app-developers app
Click to expand...
Click to collapse
Under/over volting doesn't work that way. Each chip is unique, and chips are tested only on default voltage and frequencies, so each one's behavior on non-default settings is unpredictable. Some are able to work on 100 mV lower voltage, some can't handle even -25mV... Trial and error is the core of overclocking.
yep, that's one of the reasons i disagreed with the other UV thread - they list absolute voltage levels which are only applicable to the specific grade of chip in their phone (and yes, I posted some corrections in the other thread but they were ignored).
Have a look HERE if you'de like to see all the different possible default voltage settings for the i9300/i9305.
As a rough rough guide of a voltage level for the 200MHz step that will (hopefully) crash your phone, I'd start at 650mV.
i have tested my cpu
for stable values and i finished with these settings:
200Mhz - 0.775V
300Mhz - 0.800V
400Mhz - 0.825V
500Mhz - 0.850V
600Mhz - 0.875V
700Mhz - 0.900V
800Mhz - 0.925V
900Mhz - 0.950V
1000Mhz - 0.975V
1100Mhz - 1.000V
1200Mhz - 1.050V
1300Mhz - 1.100V
1400Mhz - 1.150V
1500Mhz - 1.200V
My exynos is stable for 2 months now, i play a lot of new games like most wanted etc.
In UV more important is leaving phone in idle, deep sleep on and off, or non demanding tasks, if i UV too much games were stable but i had random restarts when phone was in the pocket sleeping. But, as You mentioned, every cpu is different so everyone has to test it...
Thank you OP for this very, very useful guide. I am new to undervolting and even though I have a T999V north-american model with the Qualcomm SoC, this will prove very useful in my experimentation.
Only difference with the Qualcomm is that clock speed can go as low as 96Mhz, but you can't undervolt under 700mV - SetCPU just refuses to apply anything under that.
No probs
That's a kernel limitation, not SetCPU. Check with your kernel dev to see if they can allow further undervolting.
I tried to make the instructions as generic as possible so any stepping config could use them. good luck!
I'm doing my 96Mhz test and running a stress test.
The loading circle is still moving just fine (although a bit sluggishly) but none of my buttons are responding at all so I cant leave the test until I pull the battery. Would this count as a freeze/crash, or do you think this voltage is okay to stick at (or even go lower?!)
That's just the CPU bogging down, it's not a voltage issue.
hi guys. this might sound like a dumb question but i honestly looked everywhere but i cant seem to find the UV in setcpu. i'm i missing something?
Probably the kernel you're using doesn't support UV.
Hey
I find that 200 is stable on 687500
And then when I move to edit 300 it reboots
Then increased the number on both and still reboot.
I don't restart in between. Any idea??????
Sent from my GT-I9300 using xda app-developers app
tony1234567890tony said:
Hey
I find that 200 is stable on 687500
And then when I move to edit 300 it reboots
Then increased the number on both and still reboot.
I don't restart in between. Any idea??????
Sent from my GT-I9300 using xda app-developers app
Click to expand...
Click to collapse
That means that 200 is NOT stable. Try using a higher voltage. 0.6875v is ridiculously low
TP.
What do you mean low he says in the op to reduse to 700
THC for fast answear
Sent from my GT-I9300 using xda app-developers app
tony1234567890tony said:
What do you mean low he says in the op to reduse to 700
THC for fast answear
Sent from my GT-I9300 using xda app-developers app
Click to expand...
Click to collapse
Default voltage for 200mhz step is 0.9v (for me on asv2). So 0.7v (which is still higher than what you have set) it a whopping 200mv less than stock which is like I said before, ridiculously low. It may run at this voltage for you for now(depending on your as level), but I can pretty much guarantee you that it will never be 100% stable
I'll take your THC ; ) lol
TP.
Thanks I'll give you feed back
Sent from my GT-I9300 using xda app-developers app
omniwolf said:
Probably the kernel you're using doesn't support UV.
Click to expand...
Click to collapse
i thought the matr1x kernel supports it. UV works fine in trickster mod. i don't even have a heading for 'voltages' in the the app like it's shown in the play store.
tony1234567890tony said:
What do you mean low he says in the op to reduse to 700
THC for fast answear
Sent from my GT-I9300 using xda app-developers app
Click to expand...
Click to collapse
yep, as STAticKY says, if you get a reboot on a step, then it's not stable. raise the voltage on that step and try again.
STAticKY said:
Default voltage for 200mhz step is 0.9v. So 0.7v (which is still higher than what you have set) it a whopping 200mv less than stock which is like I said before, ridiculously low. It may run at this voltage for you for now, but I can pretty much guarantee you that it will never be 100% stable
I'll take your THC ; ) lol
TP.
Click to expand...
Click to collapse
This is only correct for your ASV value. Please edit this post, it contains incorrect information. Your default voltage for 200MHz might be 0.9v, but for other people it's likely different, as they have different quality chips. Read post 3, 4, and 5 in this thread for more info.
genericuser2013 said:
i thought the matr1x kernel supports it. UV works fine in trickster mod. i don't even have a heading for 'voltages' in the the app like it's shown in the play store.
Click to expand...
Click to collapse
possibly the matirx kernel does support UV, but it might not be exposed in the way that SetCPU is expecting. Does the Matrix kernel developer recommend a specific app to adjust the voltages? If so use that, you can still follow my guide.
Can anybody tell me how to determine ASV-level of my chip?
I tried to search for a thread relating to this but couldn't find anything, if anyone knows of one a link would be appreciated.
OK, so I flashed Motleys kernel 2 days ago. Everything was running fine, I had it OC'd to 1.6 and it was super fast and smooth. I had set the governor to "on-demand" to try and save some battery life(over "performance"), and also because it seemed like the CPU would run at full 1.6 constantly if it was set to performance (I don't know if that's how it should be or not, but this isn't the issue). I used System Tuner to OC it like he recommended in his thread.
Yesterday I set it to performance to run some benchmarks, and then continued using it on performance to see how it felt. About an hour and a half later I also started messing with my home screen and apps and ended up accidentally using Quick Boot to take me to the bootloader. After powering it back on I checked System Tuner to set the governor and once I did I noticed, according to System Tuner, that 2-4 of the cores are running at full 1.6 and the CPU usage is from 25%-100% even though I have nothing open.
I flashed my recovery via Clockworkmod Recovery, Motleys kernel is now replaced by the stock kernel, however I'm still having the same issue, but just at 1.3. Any idea why the CPU is running so high, for apparently no reason?
.....
OK, so I just checked System Tuner again and the CPU doesn't seem to be doing as bad now, but it's still all over the place and I don't have anything else open. Here are the times:
Offline - 77%
340MHz -11%
475Mhz 1%
1.2Ghz - 5%
1.3Ghz - 1%
Compared to yesterday when it had said 1.3GHz 79% or something like that (and was running nothing but system tuner).
So, yeah, that does seem a lot better but one thing remains; the CPU usage still jumps up to almost 50% and once again, I am running nothing but System Tuner, so something still doesn't feel right.
I think ondemand governor is causing the CPU to shoot up so often and quickly.(That's all I can think of.) I always use interactive and it's usually the preferred governor. Ondemand is more for people who play lots of games and they need the extra boost. If you game a lot then I guess you should still to it.
Sent from my Nexus 4 using Tapatalk 2