i set very agressive undervolt values is it safe ? - Galaxy S II Q&A, Help & Troubleshooting

hi all i have set my s2 uv values to very agressive values is it safe or not ?
and my phone never craches " crash once i change the shed. from bfq to noop "
i am using the latest seyah kernel 2.6.11
100 ---- 825
200 ---- 825
500 ---- 875
800 ---- 950
1000 --- 1050
1200 --- 1150
is it safe or not ?
and i use set cpu with voltage control cau voltage control "free" doesnt have screen of profile
and any one can recomend the best shed. for my config.
bfq or sio or cfq

Bfq or sio with Siyah 2.6.11, take your pick (I prefer sio).
So far as undervolting goes, shouldn't cause you any problems so far as reducing the life of the phone's components go. Obviously if you go too far with it you'll have instability/crashes but it shouldn't harm the phone long-term.
evaworld said:
hi all i have set my s2 uv values to very agressive values is it safe or not ?
and my phone never craches " crash once i change the shed. from bfq to noop "
i am using the latest seyah kernel 2.6.11
100 ---- 825
200 ---- 825
500 ---- 875
800 ---- 950
1000 --- 1050
1200 --- 1150
is it safe or not ?
and i use set cpu with voltage control cau voltage control "free" doesnt have screen of profile
and any one can recomend the best shed. for my config.
bfq or sio or cfq
Click to expand...
Click to collapse

thanks for your answer will try sio , and now i will not be worry about my phone thankss

evaworld said:
thanks for your answer will try sio , and now i will not be worry about my phone thankss
Click to expand...
Click to collapse
Yeah. Undervolting does not harm the device. Overvolting and sometimes overclocking however does.

Related

[MOD] IncrediControl - Easy GUI Voltage Control

Please read this post through thoroughly before downloading.
This app allows you to control your CPU voltages with an easy to use interface. You can increase or decrease voltages (undervolt or overvolt) for all frequencies or fine tune voltages for each individual frequency.
! HTC DEVICES, currently only single core devices are supported !
! ROOT is Required !
! Kernel that supports HAVS or SVS voltage adjustment REQUIRED !
Get it over at http://www.incredikernel.com
IncrediControl is now also available in the market:
IncrediControl
IncrediControl - Ad Free
Additionally, all donators are eligible to receive the Ad Free version. It doesn't matter how much or how little you donate or have donated. If you don't want to purchase the app from the market, you may donate using the button on this page. Please register on the site first and include your username in the comments box.
All previous donators, please register on the site if you have not done so and contact me with your username!
NOTE: The settings in the general tab are only functional in kernels that have implemented the simple sysfs interfaces for usb fast charging and audio boost. The tab will not show up if your kernel does not have these features. If you would like your kernel dev to implement the interfaces, please direct them to these two commits:
https://github.com/Chad0989/android_kernel_common/commit/a7c21fa0391c225900f93960362535179c0cecc9
https://github.com/Chad0989/android_kernel_common/commit/41dc138bae23dc7582de72a4d9895aaa8e1f8b2d
NOTE2: It is a requirement of the voltage adjustment that the kernel you are using has either the HAVS or SVS sysfs interface implemented. If it does not, it will not work.
NOTE3: Before using, please delete any boot scripts you may have in /etc/init.d that toggle any of the settings this app controls.
Get it at http://www.incredikernel.com
Restore script - use this if you went too low and find yourself in a boot loop. Flash through recovery:
http://www.incredikernel.com/?p=229
Looks neat. I would try it but I am a complete noob at kernel clocking and voltage. Is there a guide for N1 volt changing?
I would give a try... looks nice GUI... emmm... does this same like SS4N1?
Androidity3000 said:
Looks neat. I would try it but I am a complete noob at kernel clocking and voltage. Is there a guide for N1 volt changing?
Click to expand...
Click to collapse
It's a lot of trial and error, you have to find the lowest voltages you can while still being stable and its different for all phones. Here is an example of a HAVS table that is stable on about 50% of dIncs (which share the same processor with the n1, so I'm guessing your voltages may be similar)
128000 850 875
245000 850 875
384000 875 900
422400 875 950
460800 875 975
499200 875 975
537600 875 975
576000 875 975
614400 875 1000
652800 875 1025
691200 900 1050
729600 900 1075
768000 925 1100
806400 1100 1150
844800 1100 1150
883200 1100 1150
921600 1125 1200
960000 1150 1200
998400 1175 1225
1036800 1200 1225
1075200 1225 1250
1113600 1225 1250
You can use these as a starting point. They may or may not be stable for you. If you're running an SVS kernel (only one set of voltages comes up when you start the app, use the voltages on the right of the table.
clustered said:
I would give a try... looks nice GUI... emmm... does this same like SS4N1?
Click to expand...
Click to collapse
I'm unfamiliar with ss4n1, but this is an app that is used to adjust cpu voltages so that you may under or overvolt the cpu.
chad0989 said:
It's a lot of trial and error, you have to find the lowest voltages you can while still being stable and its different for all phones. Here is an example of a HAVS table that is stable on about 50% of dIncs (which share the same processor with the n1, so I'm guessing your voltages may be similar)
128000 850 875
245000 850 875
384000 875 900
422400 875 950
460800 875 975
499200 875 975
537600 875 975
576000 875 975
614400 875 1000
652800 875 1025
691200 900 1050
729600 900 1075
768000 925 1100
806400 1100 1150
844800 1100 1150
883200 1100 1150
921600 1125 1200
960000 1150 1200
998400 1175 1225
1036800 1200 1225
1075200 1225 1250
1113600 1225 1250
You can use these as a starting point. They may or may not be stable for you. If you're running an SVS kernel (only one set of voltages comes up when you start the app, use the voltages on the right of the table.
Click to expand...
Click to collapse
My N1 runs fine with this settings, thanks.
Sent from my Nexus One using XDA Premium App
IncrediControl v1.3
Major changes include:
Ad Free has now been turned into a key that removes the ads from the free version. This allows donors who have downloaded the ad free version from the site to update through the market.
HAVS voltage checking. Minimum voltages can no longer be set higher than maximum voltages.
Boot voltages are now stored in the application’s data directory. Boot settings will now persist if you update your ROM or restore the application and data from a backup.
I'm new to undervolting background. I remember reading about havs before but forget most of what it is. .. . . .can I ask when setting the voltages what is the correspondance of havs voltage to normal voltage? It appears to be higher by most ppl, is there a set amount which it should be higher than original undervolt per frequency?
Jandyman said:
I'm new to undervolting background. I remember reading about havs before but forget most of what it is. .. . . .can I ask when setting the voltages what is the correspondance of havs voltage to normal voltage? It appears to be higher by most ppl, is there a set amount which it should be higher than original undervolt per frequency?
Click to expand...
Click to collapse
Most generally set the voltages lower than whatever undervolt is provided by the kernel. It takes a lot of trial and error to get the voltages as low as possible while still being stable. If you look above I posted an example table that you may use as a starting guide.
chad0989 said:
Most generally set the voltages lower than whatever undervolt is provided by the kernel. It takes a lot of trial and error to get the voltages as low as possible while still being stable. If you look above I posted an example table that you may use as a starting guide.
Click to expand...
Click to collapse
Thanks. I just realised my kernal doesn't support havs so its tab/settings are irrelvant anyway XD But I used your table but then found another table in a thread for a kernal for my phone with voltages much lower again and I adopted those values without any stability problems so far
EDiT:My second question has been answeres . .read changelog now that I kno I can restore my custom Voltage table through titanium backup this is now one my my favourite utilities
Wait . . .just realised that 'set on boot' isn't working for me :/
When I apply changes and click set on boot and restart my changes are lost and voltages are back to default! it does say 'boot settings found' though
And another question on a related note, let's say voltage at 122 is 800mv. . . .and voltage at 192 is also 800mv. Does this mean the battery drainage of running at 122 and 192 is identical?
(Because if this is the case it would mean by always setting the minumun frequencies at the highest voltage of a certain mv range you get the same battery drain but tasks get done faster so its being drained for less time . . .saving battery?)
Jandyman said:
Wait . . .just realised that 'set on boot' isn't working for me :/
When I apply changes and click set on boot and restart my changes are lost and voltages are back to default! it does say 'boot settings found' though
And another question on a related note, let's say voltage at 122 is 800mv. . . .and voltage at 192 is also 800mv. Does this mean the battery drainage of running at 122 and 192 is identical?
(Because if this is the case it would mean by always setting the minumun frequencies at the highest voltage of a certain mv range you get the same battery drain but tasks get done faster so its being drained for less time . . .saving battery?)
Click to expand...
Click to collapse
Are you clicking set on boot and then clicking apply afterwards? You must check the box and then click apply. Try restoring defaults and trying again.
Also, a higher frequency running at the same voltage will draw more power than a lower frequency at the same voltage. While the voltage is the same, the current draw at a higher frequency is more = more drain.
IncrediControl v1.4:
This is mostly a bug fix release but I have also added:
Automatic detection of the minimum and maximum voltages supported by your kernel
Unless any more bugs arise, the next release will have some new goodies to play with...
http://www.incredikernel.com or from the market.
The first two values in incredicontrol are a digit shorter than the rest, what are these for?
Are these the pm mode cpu freq values? Or should der be a 0 at the end.
Jandyman said:
The first two values in incredicontrol are a digit shorter than the rest, what are these for?
Are these the pm mode cpu freq values? Or should der be a 0 at the end.
Click to expand...
Click to collapse
Post the frequency table you're getting. Thanks.
Here you go
Jandyman said:
Here you go
Click to expand...
Click to collapse
Looks like the kernel dev made those frequencies usable. If you utilize them then you can adjust the voltages. If you don't use them then you can leave them. What kernel?
Sent from my ADR6300 using XDA App
Ah ok, in that case because the frequency is so much lower I should be able to put the voltage wayyyy down am I right? Its already undervolted by about -50)
I'm using UmaroKernal 1.06
Jandyman said:
Ah ok, in that case because the frequency is so much lower I should be able to put the voltage wayyyy down am I right? Its already undervolted by about -50)
I'm using UmaroKernal 1.06
Click to expand...
Click to collapse
In theory you should be able to go pretty low on them. But it only matters if you actually use those frequencies. What is your minimum frequency set at?
Sent from my ADR6300 using XDA App
chad0989 said:
In theory you should be able to go pretty low on them. But it only matters if you actually use those frequencies. What is your minimum frequency set at?
Sent from my ADR6300 using XDA App
Click to expand...
Click to collapse
Well I'm not using them atm because I was afraid they would cause instability on wake mode and in sleep mode I taught they would keep the phone out of om state for longer than what was worth the battery saving.
At the moment the minimum frequency for both screen on and screen on is 122880 @775mv

Best governor for performance and battery saving??

I m on cyanogenmod 7.2 by fat.. i just wanna know which is the best governor for faster performance and better battery saving...
Pls do reply
Sent from my GT-S5830 using CyanogenMod 7.2 by FAT
Depends on user requirements but for me it is smartass v2
TeamCooper Developer
TheMyth Developer
www.teamcooper.net
SmartassV2 suits best for my regular usage.
I use SetCPU to set diff CPU frequencies. (zImage v1.5 kernel)
Normal: 160 Min 735 Max -- SmartassV2
Charging: 120 Min 600 Max -- SmartassV2
Screen Off: 240 Min 320 Max -- Ondemand
Temp > 40C: 120 Min 480 Max -- Ondemand
Battery <11%: 120 Min 320 Max -- Conservative
http://forum.xda-developers.com/showthread.php?p=19846297
i use smartassV2
Smartass v2
----------------
Sent from my Ace. Galaxy Ace
SmartAss V2 is more balanced yet more battery wise than Ondemand.
InteractiveX is I think the best battery saver
Sent from my GT-S5830 using Tapatalk
Thanx... everyone is using smartass v2
subha632 said:
Thanx... everyone is using smartass v2
Click to expand...
Click to collapse
I m too using that.
Sent From My SGA via Xda Premium App
Rushyang said:
SmartassV2 suits best for my regular usage.
I use SetCPU to set diff CPU frequencies. (zImage v1.5 kernel)
Normal: 160 Min 735 Max -- SmartassV2
Charging: 120 Min 600 Max -- SmartassV2
Screen Off: 240 Min 320 Max -- Ondemand
Temp > 40C: 120 Min 480 Max -- Ondemand
Battery <11%: 120 Min 320 Max -- Conservative
Click to expand...
Click to collapse
u shouldnt be doing that.
ever wonder why nofrills cpu control doesnt include cpu freq/governor changing based on profile? because the author stated that those changing should be done natively by the cpu governor, not by the phone itself.
and smartassv2 already include max cpu freq on screen off profile and for my kernel i already set it to 320. same as ondemandx, savagedzen, interactivex and smartass, i already set screen off max at 320.
SmartASS v2
Sent from my GT-S5830 using xda premium
Not to be specific but it depend on your kernel....
regards,
•ƒγяύs ργяσ™• eBuddy XMS pin: A24D43B9
[rOms dOn't KiLL phOnE, nOob dO ]
Ummm... so no ones for conservative?
I prefer conservative..
Sent from my GT-S5830 using XDA
an0nym0us_ said:
u shouldnt be doing that.
ever wonder why nofrills cpu control doesnt include cpu freq/governor changing based on profile? because the author stated that those changing should be done natively by the cpu governor, not by the phone itself.
and smartassv2 already include max cpu freq on screen off profile and for my kernel i already set it to 320. same as ondemandx, savagedzen, interactivex and smartass, i already set screen off max at 320.
Click to expand...
Click to collapse
+1 to that
TeamCooper Developer
TheMyth Developer
www.teamcooper.net
syed.sayeed96 said:
Ummm... so no ones for conservative?
I prefer conservative..
Sent from my GT-S5830 using XDA
Click to expand...
Click to collapse
Me too, conservatibe has the best powee savin.g. Of course, litte bit slower but not even noticeable, and good battery life.
Sent from my GT-S5830 using xda premium
Conservative + underclocked = Amazing battery life (nothing extraordinary but amazing from Ace's low standard)
And performance....wen gaming...wid just slight overclocking...with charger plugged in.....with back cover out...feels like its gonna burst into flames...
an0nym0us_ said:
u shouldnt be doing that.
ever wonder why nofrills cpu control doesnt include cpu freq/governor changing based on profile? because the author stated that those changing should be done natively by the cpu governor, not by the phone itself.
and smartassv2 already include max cpu freq on screen off profile and for my kernel i already set it to 320. same as ondemandx, savagedzen, interactivex and smartass, i already set screen off max at 320.
Click to expand...
Click to collapse
I'm getting what your point is. But, I have several questions:
1) Why that guy developed an application -No-Frills CPU Control when all the features he presented where available under Settings > CyanogenMod Settings > Performance?
(And then he said "you might need a custom ROM like CyanogenMod", if he didn't give profile feature)
2) When I go to /sys/devices/system/cpu/cpu0/cpufreq/smartass I can't read any of its set frequencies.
3) And how come SetCPU is any different then switching the governor manually? Standard procedure also changes the governor as SetCPU does. So how come it is harmful? Just because SetCPU might switch profile too often?
I used SetCPU just to save more battery. I'll disable SetCPU and observe CPUSpy stats and let you know about freqs switching.
No Frills works on a stock ROM dude, he said you might need to use CM because maybe he's afraid stock kernel has a freqlock thingy.
Sent from my GT-S5830 using Tapatalk
Best governor, hmm which state ? Arnold, that artist ? Hhhhh
Linux kernel governor, hmmm I dont care on these. I use default ondemand, and burnout battery that I dont care, as long as i can see elctricity terminal or I have to use 60Ah car battery in my back hhhhhh.
I didnt use my ace on scientific processing, connecting thousand of android doing parallel processing looking for alien. So 8 hours battery is enough for me.
Peace

(Q) CPU governor and I/O scheduler

As title says, what is the best setting to be chosen?kindly brief the detail coz im newbie
Sent from my SK17i using XDA
Well it depends on taste and kernel support but for me the best will be interactivex as governor and sio as I/o scheduler, it gives you no lags and good battery life.
i installed x kernel v4, did not have to change the cpu governor or i/o.
i only install nofrills to do benchmark, then removed it afterwards.
best battery life ever on hybrom v16
i think it uses ondemand for cpu, not sure wether it uses noop or deadline for i/o
i am currently testing smartassV2 cpu governor with simple i/o scheduler on krsh3 kernel
so far battery time is better with these settings than the default ondemand governor
http://forum.xda-developers.com/showthread.php?t=1369817

[Q] Proper Clockspeed?

I am on the latest milestone 6 rom, and also the latest devil kernal. What is the clockspeed I should set it at, and also which governor works best?
Solidsnake726 said:
I am on the latest milestone 6 rom, and also the latest devil kernal. What is the clockspeed I should set it at, and also which governor works best?
Click to expand...
Click to collapse
I use 1200 MHz cpu speed, 105% liveoc, vr i/o scheduler and lulzactive governor. smooth and stable. though liveoc can be raised
reidandkat said:
I use 1200 MHz cpu speed, 105% liveoc, vr i/o scheduler and lulzactive governor. smooth and stable. though liveoc can be raised
Click to expand...
Click to collapse
how about the battery performance ?

Stock CPU frequency, governor and I/O scheduler?

Hey
After I rooted (and reflashed) my Z5C, I noticed that the battery was draining very quickly. Then I found out that it had been running on max frequency w/ the performance governor. So I wanted to ask if anyone knows the default/stock frequency, governor and scheduler? And for some reason it sets itself to performance and on the highest frequency so I have to set it manually apparently...
Kernel auditor can possibly help

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