I am on CM7 (n72) with faux's latest 0.2.9 uv kernel, and am undervolted all the way down to 10 mv each on the 389 and 503 frequencies with no performance changes. I have tried setting it with both setcpu and pimpmycpu. I know there can't be a way for my phone to be working at those levels so what am I doing wrong? Am I missing something?
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If you lowered the voltages to -10 then you have not lower to aggressive. If you lower the volts to much device will not boot. I am at -50 across all values. Lower the volts is supposedly to improve battery (life) performance not speed performance.
To be quite honest with the questions the OP is asking he shouldn't be messing with an UV kernel.
Ok, I believe the kernel has a built in minimum mv that it will run at, regardless of how low you set the values in setcpu. Im certain that faux posted what that low value was once when someone else was bragging about undervolting by -250...you aren't really undervolting that low. However, some of our phones cant even handle that minimum low voltage, so consider yourself lucky.
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mmapcpro said:
Ok, I believe the kernel has a built in minimum mv that it will run at, regardless of how low you set the values in setcpu. Im certain that faux posted what that low value was once when someone else was bragging about undervolting by -250...you aren't really undervolting that low. However, some of our phones cant even handle that minimum low voltage, so consider yourself lucky.
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Thank you that's what I was wondering about! Sorry if I didn't phrase my question correctly, I meant the voltages were set at 10 mv, not lowered by 10
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I ran into the same problems. In another thread, faux123 stated that the way tegra works, each adjacent frequency level should only differ by ~ 100mV. so if you started with 1000mhz @ 1000 mV, then the next frequency will be 800mhz @ 900mV (just an example). so pretty much it all depends on how low of a voltage your top frequency can run on. if your voltage difference between 2 adjacent frequencies is larger than ~100mV, then it means nothing.
again, I gathered this info from faux. I have no sold knowledge whatsoever
prettyboy85712 said:
To be quite honest with the questions the OP is asking he shouldn't be messing with an UV kernel.
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We all have to start from somewhere, be nice. It sounded like he misspoke.
Related
I'm having an issue with my phone not being responsive if I set the CPU to 400Mhz. I first found this problem using Juice Defender then I uninstalled that and did it under SetCPU and it still did the same thing. The phone pretty much doesn't wake up after a while. I have to do a reboot in order for it to work again.
Don't get mad at me but IMHO overclocking and messing with a phones core features (what makes it run, processor, ram, etc.) is unsafe and can cause instability. And no I have no scientific research to back this up but it's just my two cents.
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Lol I'm not mad. I don't really like to over clock. I just figured under clocking would work better. But nooooo lol
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It does that under 800 mhz I forget why but I've read that in a couple places
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underclocking that much is using less than 1/3rd of your true processor power.
your processor simply is not able to draw enough power to perform its background tasks - even when the phone is idle - when you underclock to such an extreme extent. therefore, it freezes trying to complete these processes.
if you're going to underclock, i'd say that 800 MHz is the lowest you can go if you are expecting your phone to do everything it is supposed to do. although it isn't going to save you THAT much battery life anyway, so you might as well just run it at the stock setting of 1200 MHz.
Focustom said:
Lol I'm not mad. I don't really like to over clock. I just figured under clocking would work better. But nooooo lol
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I understand LOL. And he's right underclocking honestly doesn't
Save much battery.
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There's a known issue with setting CPU profiles to less than 800 MHz. A fix exists but some kernels don't have it.
Many of our Gingerbread kernels fix it, Infusion-GB is one of the few that hasn't pulled in the fix yet. (Although version 1.1 may have pulled it in, haven't checked github lately.)
None of the Froyo kernels have an explicit fix, but I'm not sure if the flaw even applies to our Froyo kernels as the clocking architecture is VERY different.
Hi, Rogers stock 2.3.3
It's using up 60% battery over night. Most likely I should turn off Wi-Fi.
I have underclocked to 100, 200, and 400 and it's stable --- minus the delay/lag at 100 and 200 . Sorry to seem like a troll.
I find that by default this phone either runs at 100mhz or 1200 on average, and 200 400 800 under 10%
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ierdna said:
Hi, Rogers stock 2.3.3
It's using up 60% battery over night. Most likely I should turn off Wi-Fi.
I have underclocked to 100, 200, and 400 and it's stable --- minus the delay/lag at 100 and 200 . Sorry to seem like a troll.
I find that by default this phone either runs at 100mhz or 1200 on average, and 200 400 800 under 10%
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Bumping from 100 to 1200 is classic ondemand governor behavior.
Also, some people never had problems even without netarchy's sleep patch running the CPU capped to 400 - but others have. I don't think anyone has had a problem with a patched kernel.
I'm sorry for the noob question but I really don't understand voltage terms and what's it for and how it work I was wandering if anyone could explain it to me?
In the past I would use set CPU and create a few profiles and would be done with it but I been reading on the forums about setting voltages higher and lower for better performance.
Currently i'm on eagles blood 2.3.5 ROM, trinity t15 (fun) kernel.
Any help would be much appreciated.
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Don't know what it does don't use it
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ritthyhang said:
I'm sorry for the noob question but I really don't understand voltage terms and what's it for and how it work I was wandering if anyone could explain it to me?
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It's to save power and get better battery life. You lower the amount of power the chip gets at various clockspeeds until it starts not working correctly, then back up to a voltage at which the chip is stable at that clockspeed. Some chips can handle lower voltages than others while still working correctly.
Overclocking = get better performance
Undervolting = get better battery life
Both can lead to phone instability if you set the values to extremes.
Thank you for the info
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lannister80 said:
It's to save power and get better battery life. You lower the amount of power the chip gets at various clockspeeds until it starts not working correctly, then back up to a voltage at which the chip is stable at that clockspeed. Some chips can handle lower voltages than others while still working correctly.
Overclocking = get better performance
Undervolting = get better battery life
Both can lead to phone instability if you set the values to extremes.
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So lemme ask this how do I undervolt and what voltage is safe to undervolt?
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ritthyhang said:
So lemme ask this how do I undervolt and what voltage is safe to undervolt?
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It all depends on the kernel your using and if it supports UV, it should say if it does in the name of the kernel tho(just look for uv ) Setcpu 2.2.4 will allow you to change voltages only if your kernel/rom support it.
you can safely undervolt -50 -75 at most all the way up to 1.0ghz-1.1ghz i wouldn't undervolt past that.
d12unk13astard said:
It all depends on the kernel your using and if it supports UV, it should say if it does in the name of the kernel tho(just look for uv ) Setcpu 2.2.4 will allow you to change voltages only if your kernel/rom support it.
you can safely undervolt -50 -75 at most all the way up to 1.0ghz-1.1ghz i wouldn't undervolt past that.
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So what your saying is I can use setcpu to change the voltage?I just recently changed kernels I saw that option available but I didn't understand how to use it.under voltages it shows all the GHz underneath it it shows 0.From here what do I do?, do I go too each GHz profile and -50 from all of it?
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Hey guys will overclocking drain the battery quicker even with stock voltages?
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Different voltages are specified as stock for different frequencies. As the frequency changes, the voltage does too. Running 1200mhz with the stock 1000mhz voltage will probably cause instability and crashing.
Harrb, great post.
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And if increase voltage, the power consumption should also increase.
i haven't played with voltages yet but in my experience the benefits of overclocking are minimal anyway, and they make nexus reboot often and other bad things :/
With the right settings you can get a fully stable and functional overclock, but it is on a per-phone basis due to varying quality of the same CPU during manufacture.
Harbb said:
Different voltages are specified as stock for different frequencies. As the frequency changes, the voltage does too. Running 1200mhz with the stock 1000mhz voltage will probably cause instability and crashing.
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Currently I'm using icup kernel speedy 5 clocked at 1.4 and its been extremely stable. So what your saying is that the voltages automatically increase when I select a higher frequency, because I did not change them manually.
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xmatrix13 said:
Currently I'm using icup kernel speedy 5 clocked at 1.4 and its been extremely stable. So what your saying is that the voltages automatically increase when I select a higher frequency, because I did not change them manually.
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Open NSTools and select Voltage tab. That's the list of "stock" voltages for each frequency.
suksit said:
Open NSTools and select Voltage tab. That's the list of "stock" voltages for each frequency.
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Thanks
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A CPU governor such as on demand, lulzactive and lazy tells the CPU what clock to be at and automatically change. While reading, it will be at 100 or 200mhz, while playing a game it will be at the maximum clock you tell it to. Saves power this way.
your asian said:
i haven't played with voltages yet but in my experience the benefits of overclocking are minimal anyway, and they make nexus reboot often and other bad things :/
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yes, usually 1 GHz is enough , UV or OC also may reduce hardware's physical life
Is there an app that will work to control voltage on ICS yet?
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Nstools
Link - http://forum.xda-developers.com/showthread.php?t=1333696
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ROM Toolbox Pro also allows you too modify these settings.
Or setcpu
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Do these require specific kernels to work?
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Yes , not all kernels allow change voltages
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Voltage adjustment is not really necessary, unless you are increasing voltages for overclocking.
NStools is a Nexus user favorite, powerful, and free.
Braneless said:
Voltage adjustment is not really necessary, unless you are increasing voltages for overclocking.
NStools is a Nexus user favorite, powerful, and free.
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Voltage adjustment is necessary when UVing so you can save battery duh??? lol
Even when overclocking.
XxLostSoulxX said:
Voltage adjustment is necessary when UVing so you can save battery duh??? lol
Even when overclocking.
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Uhh, no. I suggest you read up on the findings/observations documented by multiple kernel developers and bedalus's kernel testing posted here. UV has no effect on power consumption.
Read first post http://forum.xda-developers.com/showthread.php?t=1448900
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Braneless said:
Uhh, no. I suggest you read up on the findings/observations documented by multiple kernel developers and bedalus's kernel testing posted here. UV has no effect on power consumption.
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Well I tested it on my friends nexus s 4g and my epic 4g and with a lot of UVing. Lemme further explain.
Okay when you UV it just uses less amount of voltage on that frequency so in essence you save battery because not as much voltage is being used. Now however if you UV by a lot like -100mV and higher the phone will lagg a bit. If you overvolt your pushing more voltage to the phone which is more power being used.
I just tested my phone freqs. Used were 100,200,400,600,800,1000 And all were UVed by -100mV and playing games and using lower freqs it will lagg. When I didn't UV at all it never lagged.
Not to mention BTW I was @ 88% before and it only took me 2 mins to post this and now I'm at 86% with no UV at all. And last post before this I took me same time with UVed I went from 95% to 95% lol.
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XxLostSoulxX said:
Voltage adjustment is necessary when UVing so you can save battery duh??? lol
Even when overclocking.
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Not according to my testing.
kernels ; battery ; ROM ; gov/sched
Now with summaries in the first posts. Convenient for XDA app users!
bedalus said:
Not according to my testing.
kernels ; battery ; ROM ; gov/sched
Now with summaries in the first posts. Convenient for XDA app users!
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Well I can say every phone is a tad bit diff. But for whatever reason no matter who's phone when I UV if the phone handles it it. It saves me battery I want you to test this and see.
Run whatever scheduler and say performance run 100 MHz by -200mV like and 200 Mhz by -150mV and so forth. Play GtA 3 and watch when UVed it laggs and when Not it laggs stillbut not as bad. I mean hell even 1.5GHz no UV I still lagg haha
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Thanks guys! Ill check on this some more when I get home.
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I know that if you OC/UV incorrectly, it can cause stability issues. But I was wondering does it cause any damage to the phones hardware like battery, etc? And like how can you tell when SETCPU is causing problems?
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Well if you OC to high numbers your just stressing the cpu more.Knowing when you have issues is simple getting random reboots,phone getting too hot etcc.
It differs for every phone but undervolting -25 for each voltages works well.
Personally I really don't see the point overclocking to high levels like 1.4 ghz etc,Is up to individual I guess.
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daxecutioner24 said:
Well if you OC to high numbers your just stressing the cpu more.Knowing when you have issues is simple getting random reboots,phone getting too hot etcc.
It differs for every phone but undervolting -25 for each voltages works well.
Personally I really don't see the point overclocking to high levels like 1.4 ghz etc,Is up to individual I guess.
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Yeah I have been wondering what's the point of OC to 1.4? Does it make that big of a difference in the 4g speed? And cpu speed?
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Honestly, there really is no point other than for benchmarks. I, like mt3g, actually underclock the phone to something like 750-760mhz; it runs beautifully smooth.
Other than that, if you game a lot and want to maximize FPS, then overclocking would do that for you.
Doesn't have anything to do with 4g speed afaik. That's entirely reception.
Yeah 4g is about reception and tmobile simply.
I mean I had single core devices like MT4g ,SGS 4g for the most part on a day to day basis transitions to transitions theres not much diffirence in terms of speed. Now for FPS and a few other games you need that dual core.Point is there"s no need to OC a dual core phone!
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I have had mine OC'd to 1.1 ghz with some undervolts. It is very stable , 10-12 hr battery with medium to heavy use , and ofcourse fast. Took a while to find the best settings.
When I have SetCPU set to 1015 megahertz, that's the same as stock voltage, isn't it?
NekoNyapii said:
When I have SetCPU set to 1015 megahertz, that's the same as stock voltage, isn't it?
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What does CPU speed have to do with voltage?
theking_13 said:
What does CPU speed have to do with voltage?
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I meant the same as stock speed.
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setcpu phone overclocking
Changes you might see are battery life but not that much unless you so how mess with voltage. Like other have said you know it effecting stability when its overheating, shutting down randomly, exiting program randomly.