yashsingh1/xdaforums huggingface dataset:
[Galaxy S II Original Android Development] b2rdetor:
sorry but cant confirm dat and cant bealive dat

with 200mHz GPU aftermath will so jerky!!! like slideshow

may be at the begining of the game its can run with 200, but 4+ levels it cannot

smoothness with 400mHz much more not only aftermath - other games improove its performance too.

266 also smoother than 200mHz!

gokhan you can set 200 by default but it not give you more battery life - may be 5% or less. gpu dont drain too much power even on 400mhz
[Galaxy S II Original Android Development] brack11:
@geko I reduced voltages even more and everything works smooth. Thank you.

Sent from my GT-I9100
[Galaxy S II Original Android Development] b2rdetor:
voltages can affect only stability - not smoothness ))
[Galaxy S II Original Android Development] levinx:
Hi! First of all, thank you for the effort and hard work put into this, it runs really smooth on my SGS2.

However, there is one minor problem for me (Running on stock 2.3.3), whenever I pull down the notification tab, the light for the touchkey will go off and the only way to go around this and activate them again is to lock the display and then unlock it again. Not too sure if this is a compatibility issue with my older rom.
[Galaxy S II Original Android Development] stevehkim:
Not only you. Happens on my sgs2 i777 running miui rom. Not a biggy.
[Galaxy S II Original Android Development] Nirvana1000:
How much more thickness and weight does it add to the phone?
[Galaxy S II Original Android Development] jdonk:
Pretty sure this kernel is for 2.3.4 and newer. Might be time for an update.
[Galaxy S II Original Android Development] shrooms90:
I use lowest for all freqs exept for 1200 (im not overclocked). On 1200 i use 266 as busfreq. And for the benchmark i was talking about i used performance govenor.
[Galaxy S II Original Android Development] BoneMo:
2000mah battery make phone as thick as the thickest bottom part with speaker...doesnt add much weight

battery cover is completely flat with rounded edges to phone...better to see picture
[Galaxy S II Original Android Development] :
1mm and a few grams. it levels the back of the phone between the back curve on the bottom and the camera (good, now the camera doesn't get scratched with the phone lying on a surface!). It becomes as it should have been in the beginning before this "slim phones madness" went outta control ;)

There is a specific thread full of pics and comparisons and tests in the accessory section!

Sent from my SGS2 - Checkrom Revo 4 | Speedmod k18 | Vertumus ICS Theme |
[Galaxy S II Original Android Development] KennyLegend:
I've had 2 shutdowns on 2.5.1.

The last one just happened overnight. Went to bed with about 35% in my battery, woke up while ago with phone powered off. I thought something had drained the battery but when i plugged it in and gave it a few mins it read 51%.

Not really sure what caused this.
[Galaxy S II Original Android Development] ReiKo90:
Hi,

It seems you didn't get my latest P.M.? I explained how stupid I was not saving msg's... can you resend your cpu/voltage settings? =)
[Galaxy S II Original Android Development] kalpik:
That's it! I'm unsubscribing from this thread. Will probably subscribe to Gokhan's blog. It's very irritating to be disturbed by a notification only to find out its someone asking for some settings via PM :|
[Galaxy S II Original Android Development] anndrius:
Hi, i'm using 2.5.1 GT and trying to undervolt via voltage control app, but i can't find where i can change bus freq. and i don't see "Siyah Special" feature in that app. Can someone help me ? :)
[Galaxy S II Original Android Development] levinx:
Its the latest version available to me from Kies, checked out the official rom page in this forum and its the same.
[Galaxy S II Original Android Development] ozzyita:
I had my first restart yesterday, I'm on 2.5. Kernel left stock no tweaks

Inviato dal mio GT-I9100 usando Tapatalk
[Galaxy S II Original Android Development] Gowind:
Hey buddy my phone becomes really hot while charging. can that be because of the new GPU settings. I have made a change though. Increased 100MHz to 900mV as my phone showed a new color (Hellish pink) a couple of times. By the way now when I'm typing this, the temperature has really come down and its still connected to the charger :P

Sent From My Beastly GS2!
[Galaxy S II Original Android Development] Enzopreme:
im sure that this has already been brought up but im only on break for 20 more minutes and i tried to do some light searching but couldn't find anything, how do i edit the freq_tables to give me the 1696 mhz step? and what other measures should i take to keep it running well?
[Galaxy S II Original Android Development] droidphile:
In your script:-

echo "1696 1400 1200 1000 800 500 200 100" > /sys/devices/system/cpu/cpu0/cpufreq/freq_table

Measures you should take care:

1) Supply enough voltage for 1696 (something above 1400mV depending on your cpu stability)

2) To avail 1696 among scaling frequencies, you need to set it as scaling-max-frequency as well.

echo "100" > /sys/devices/system/cpu/cpu0/cpufreq/scaling_min_freq

echo "1696" > /sys/devices/system/cpu/cpu0/cpufreq/scaling_max_freq
[Galaxy S II Original Android Development] Mikulec:
Exactly what I was saying. More then 50% of this thread is about Gakos settings and when u want to find something u have to go through houndreds of pages.

Thats insane.
[Galaxy S II Original Android Development] brack11:
Voltage is changed after clicking on every frequency but bus can be modified after you click on "bus" button at the top right corner of voltage tab.

EDIT Siyah Special is probably gpu settings, this is separate tab next to voltage tab.

Sent from my GT-I9100
[Galaxy S II Original Android Development] Aggy73:
Here a Clip about the settings of the Charge Current

and the real current :-)

Galaxy S2 Charging Current
[Galaxy S II Original Android Development] menkromsen:
I agree!

Geko95gek has obviously found some voltage settings that seems to work well with lot's of users. Great!

But nothing to get crazy about! PM him, and please do not clutter this thread anymore with stupid questions!

Clockspeed and voltage control is pretty basic if you ask me. And every phone is different! People should try to experiment a lot more for themself, SiyahKernel is very stable and responds well with tweaking. If your phone freezes, try harder ;)

For showing that it's completly bull**** that this topic "occupy" 85% of this thread here are my settings that are completly stable:

200 - 1400mhz - Conservative - i/o bfq

Standard bus speed.

200mhz - 800mV

500mhz - 850mV

800mhz - 950mV

1000mhz - 1050mV

1200mhz - 1150mV

1400mhz - 1250mV

GPU:

160mhz - 800mV

267mhz - 950mV.

I've used this settings for a long time with different releases of Siyahkernel. Works like a charm on my device.

So please try to experiment more for yourself, without asking too much in this thread!
[Galaxy S II Original Android Development] extract1:
I used to have charge current set on 800mA+ and never noticed a difference in charging speeds guess this explains why.
[Galaxy S II Original Android Development] iamsmallpang:
SiyahKernel v2.5.2b (placebo-edition)

the last kernel just released .....

will flash it later

gokhanmoral thanks your hard work

http://www.gokhanmoral.com/
[Galaxy S II Original Android Development] bragon2010:
I flashed v2.5.2b and the phone hang up on the lockscreen.
[Galaxy S II Original Android Development] gokhanmoral:
interesting video.

I notice the charging time difference with my nokia ac-10e charger.

maybe it is another placebo effect. I will make the same test with my charger which can provide 1200mA and will remove the charge current modifications if this is the case.

if he used the stock charger in the video it may be the clamping factor.
[Galaxy S II Original Android Development] gokhanmoral:
there is a warning at the beginning of the post.

it works on my device and I am sure it will work for some other people.

I guess you are unlucky that your device cannot work with the default undervolting.

or maybe your startup scripts cause that.

I am not using any init.d script now and I test it with checkrom revohd 4.0
[Galaxy S II Original Android Development] bragon2010:
Yes! I read the warning. I just tell you what happened :)

EDIT: I flashed v2.5 again and i have a lot of FC!!! Why? :S
[Galaxy S II Original Android Development] addison8406:
i flashed SiyahKernel v2.5.2b (placebo-edition)

very lag when playing 1080p video...
[Galaxy S II Original Android Development] MaGiXeN:
I've switched from Speedmod, because its make no fun to be a Testuser and every post to read about Benchmark results or the Battery Lifetime. I think your Kernel looks like a more professional work. My Device runs much much better, Keep on the great work.
[Galaxy S II Original Android Development] Lownita:
With cm7 what would be better choice: DK or regular siyah kernel?
[Galaxy S II Original Android Development] InnAl:
DK if you don't need voltage control otherwise regular.
[Galaxy S II Original Android Development] John E Dante:
Running Siyahkernel v2.5.2b with shown settings (see uploaded images) and it works beautifully smooth and don't think battery drain will be any higher than v2.5.1 (don't know yet since I just flashed it). My device has always been stable with Siyahkernel! Even with highly tweaked settings :) Great work Gokhan!!

I'm using v(r) as I/O as I find it about as smooth and fast as the quickest I/O, as well as one of the most battery friendly. Also using Conservative since I find this governor to suit my needs for both smoothness and battery. It's very smooth for me and the drain is minimal for my kind of usage. I stopped using the 1,4GHz step since I didn't find it any quicker or smoother and I didn't want to drain more battery for nothing. Set the lowest GPU-step up one notch to have a smoother experience with daily used games though no heavy weight 3D games (I rarely play these on my device so no need to tweak no setting for that)

Just sharing my experience with my buds...

Sent from some Galaxy with the speed of a neutrino...
[Galaxy S II Original Android Development] jcracken:
I'm sure more than enough people on the AT&T forum would be more than happy to test out even potentially harmful kernels on their devices, just so that there is a possibility to have one. I know I would :D

Sent from my AT&T Galaxy S II running UnNamed 2.0.0
[Galaxy S II Original Android Development] iamsmallpang:
Turkbey rom v29.3 just flashed v2.5.2b

first impression is smooth , playing 1080p video no lag

testing.........

thanks gokhanmoral
[Galaxy S II Original Android Development] tolis626:
Gokhan you are becoming more and more boring with every release.C'mon man,I didn't even get 1 reboot with 2.5.1 and you release 2.5.2?****,there ain't no suspense! :p

Anyway,2.5.2 is great.Are you planning to release a non-battery-friendly version this time,or will we all have to stick with 2.5.2b?Not that I mind,it's good,but it's a matter of habit. ;)
[Galaxy S II Original Android Development] bonanza123:
does anybody know the standard/stock voltages ?

thanks for your help in advance!
[Galaxy S II Original Android Development] gokhanmoral:
it changes according to your device's chipid.

flash 2.5.1, remove any undervolting scripts and you'll see the defaults for your device.
[Galaxy S II Original Android Development] gokhanmoral:
non-battery friendly version is on the way :)
[Galaxy S II Original Android Development] tolis626:
Aaha,that's what I'm talking about!Sounds like Turkish baklava is on its way...! ;)

(F*ck,I must have baklava somewhere around here... :p )
[Galaxy S II Original Android Development] Aggy73:
i dont use the stock charger, my ac charger in the test provides 1,5A

its only interessting for push up the charging speed with usb.

i connected my device on my laptop and put the usb current up to 500 - 950 mA

the same behaviour, 450 = 400mA 500-950 =650 mA

i risk to damage my usb port on laptop but for a short time it was ok ;-)

if your current modifications would work and the stock charger is the clamping factor, why i cant set 500mA, 550mA, 600mA ???

i think the hardware for the charge control only knows the two bits, low and high charging, 400 and 650 mA
[Galaxy S II Original Android Development] KennyLegend:
What's a baklava ?
[Galaxy S II Original Android Development] ka2uki:
yes~~2.5.2b playing 1080p video is lag~ the same 1080p video playing in 2.5.1 gt no lag ,very smooth~~maybe something wrong with this version will be to fix?back to 2.5.1 GT..wait for the fixed version~
[Galaxy S II Original Android Development] tolis626:
Baklava is a delicious Turkish-Greek(both peoples make it) dessert.Check the link and search better next time. ;)

I'm joking,but I always wanted to say it to someone. :p
[Galaxy S II Original Android Development] KennyLegend:
Lol... U have too much time on Ur hands
[Galaxy S II Original Android Development] gokhanmoral:
oh, I didn't know that it was your video.

ok, the test is good and informative.

I just want to verify it by myself because I really think it worked.

if your setup is still ready, can you also try to increase "all" of them to 950 and try with your charger?

if it doesn't work I will remove it.

but there is something I want to remind: it is samsung's mistake to provide such low charging current for such a power-hungry phone. and I have no idea how the internals work and if there you cannot change the current between 400-650 I have no idea why. maybe they have a reason..

and you are right. according to your tests there is only two states for charging.

I hope we are missing something in the source and we can make it more than 650.
[Galaxy S II Original Android Development] tolis626:
No,unfortunately I don't.But an informative post such as that is always ready. ;) :p

Sorry for OT guys! :)
[Galaxy S II Original Android Development] droidphile:
Those who are having lag on hd video playback can use performance governor @1200 mhz (or 1400 or 1600) to temporarily eliminate the lag. (Don't forget to change governor back to whatever, after you're done watching videos). Increased sampling interval for 2nd core to kick in is probably what's causing the lag. (Using dual core mode via tegrak app didn't eliminate the lag for me, but setting governor to performance did)

2.5.2p might not have this issue, so wait for it :)
[Galaxy S II Original Android Development] Aggy73:
i think 650 mA is a good value to keep the battery healthy, to high current or fast charging is not good for battery.

i have make the test with icreasing all to 950 but the other 2 values doesn have any influence ... everytime the same
[Galaxy S II Original Android Development] KennyLegend:
Also note that charging at 400 mA is gonna give slightly better battery life than at 650mA at a cost of slower charge. Also, the lower the charge current, the longer your battery is gonna last you ;)
[Galaxy S II Original Android Development] Kaboosey:
Can confirm this for sure. Not only in video playback, in game (Sentinel 3: Homeworld), when I zoom out and see the enemy "walk", it's kinda laggy. (if it's zoomed in, it's smooth though). But when I changed the governor to performance, it's smooth like how it's supposed to be. :)
[Galaxy S II Original Android Development] KennyLegend:
Gokhan if it was able to accept a 950mA charge it would die sooner. For power hungry beasts like our S2, the slower the charge the better.
[Galaxy S II Original Android Development] gokhanmoral:
I agree.

but considering the price of a new stock battery it is not a big problem.

some people prefer their devices charge faster. I sometimes have only 20 minutes to charge my phone either because I forgot to plug it into the charger during night or because of a heavy usage drain.
[Galaxy S II Original Android Development] Enzopreme:
does anyone know where theres a tutorial on this? Do i do the "echo" through cmd prompt? i have windows 7, i really want this done right though.
[Galaxy S II Original Android Development] droidphile:
You echo through init.d script which in-turn echo through a compatible shell/busybox

http://xdaforums.com/showpost.php?p=19519757&postcount=10699
[Galaxy S II Original Android Development] gokhanmoral:
please download v2.5.2b again.

I think the new one will fix 1080p problem.

I fixed a problem in bus frequency locking
[Galaxy S II Original Android Development] Jodelaplaya:
Which one is better : p or b version?
[Galaxy S II Original Android Development] Gowind:
Hey gokhan do one needs to delete his script before flashing this to benefit the actual tuning of the kernel.
[Galaxy S II Original Android Development] KcDaRookie:
Or use the tool in my signature that will let you modify most values with an easy to use interface
[Galaxy S II Original Android Development] chonshon:
Could someone tell me the value of default cpu undervolting in 2.5.2?

Thanks a lot.
[Galaxy S II Original Android Development] d8389:
Got SOD on 2.5.2b when switching on.

No UV

opps...

there is new update with same file name.

SOD again.

Reverted to 2,4,2
[Galaxy S II Original Android Development] Kaboosey:
AWESOME! The game runs smooth now while zoomed out! Hopefully it'll fix the 1080p problem too. (I don't have any 1080p video on my phone, so, can't try it out. :p )

Thanks gokhan! :)
[Galaxy S II Original Android Development] xsycox:
2.5.2b is blocking my app Perfect Applock and the starting/initializing of the system is taking ages.

Also, it does not show my apps, when I try to open the app list.
[Galaxy S II Original Android Development] stevehkim:
gokhan att version pls? ill test it and report back! thx boss you da man!

supercharged sgs2 i777 galnet rom/siyah kernel = beast
[Galaxy S II Original Android Development] shrooms90:
Lol funy. Do u (or the guy who made that video) even know how a LiIon battery gets charged? If so u would know why the battery still gets charged faster and why messuring it like in the video is worthless. There is only one way to charge LiIon battery. And raising the current will decrease chargeing time slightly. And this mesuring is worthles since the charging process of a LiIon Battery is splitted in 3 steps. The first step takes about an hour and it charges every cell to 1.2V +/- 0.5v. This step will be faster at higher current. When 1.2V is reached the current is slowly lowered to a stanby value. This takes about 2h. If u charge with higher current this step will take longer.Thats why the difference is not really noticable. And if u change charge current while chargeing u can seriously harm ur battery due to overchargeing. And step 3 is starting to disscharge the battery while leavin a standby current on the charger to keep the battery at 100%.

This chargeing method garanties that the Battery has no memory effect like the older NiCa batteries had. So it doesnt matter at whitch percentage u connect the charger and if u garge it to 100% or not.
[Galaxy S II Original Android Development] gokhanmoral:
logging is disabled in that version. Read the first two posts to enable it.
[Galaxy S II Original Android Development] Rampler:
I use setcpu to Uc my s2, after reboot the max frequency is set to 1200 instead of 800. any ideas? If running I can change the frequency as I want
[Galaxy S II Original Android Development] gokhanmoral:
does anybody know a way to identify what kind of device the kernel runs on with a kernel level check? (att, ntt or international?)

I want to make that check and convert all preprocessor directives to if conditions to make a single kernel for all similar devices.
[Galaxy S II Original Android Development] gokhanmoral:
it is because of my dirty fix for voltage control app :)

thanks for reporting it. I will not set max freq if the freq is already 1200MHz.

you have to wait for the next version or use voltage control.
[Galaxy S II Original Android Development] Siberian Tiger:
No sods here,running real smooth and fast ;)
[Galaxy S II Original Android Development] Gowind:
Hey gokhan, do I need to delete the script I used with 2.5.1 to get the full potential of 2.5.2. I mean the voltage, GPU settings and so on.

By the way after 20mins of game play, Shadowgun would start to stutter and then freeze in 2.5.1 with GPU, low power100MHz@ 900mV. I had to revert it back to 167MHz to get it work properly.
[Galaxy S II Original Android Development] gokhanmoral:
no you don't have to remove any of your scripts.

2.5.2b mainly changes the frequency scaling and hotplug timeouts/thresholds and cpu/gpu voltages.

it may not be as performant as the previous version but I will also publish 2.5.2 without any undervolting and dynamic bus freq scaling.

2.5.2b has also static bus freq and rcu_fast_no_hz enabled.
[Galaxy S II Original Android Development] Gowind:
Got it buddy, so if we can have the default CPU/GPU voltage that comes with the new kernel, a comparison can be made with the settings we have in our current scripts right..
[Galaxy S II Original Android Development] d8389:
SOD again.

Incoming cal from sleep mode.

Unable to answer, take battery out. to stop vibration and reboot.

Back to 2.4.2
[Galaxy S II Original Android Development] KcDaRookie:
will this happen on init.d scripts also or is it just a setcpu related issue?
[Galaxy S II Original Android Development] chadouming:
Getting it from build.props build.ro.something wouldnt be possible ?
[Galaxy S II Original Android Development] veyka:
I read that as balaclava at first and had a huge wtf moment
[Galaxy S II Original Android Development] gokhanmoral:
we had the same problem with init.d scripts

to fix it, I re-echoed the sampling_max_freq 20 seconds after executing init scripts.

but since setcpu also waits for some time before applying the max freq at boot time, if you don't have any init.d script modifying that value stock value will be re-echoed to the device file after setcpu sets the frequency.

I fixed it now.

if the frequency is 1200mhz after executing init scripts it will not be re-echoed to /sys/whatever/cpu0/sampling_max_freq
[Galaxy S II Original Android Development] xsycox:
Thank you, I used EnabledLogger and now that service is not restarting like hell.

Still I have to say, it is taking ages to load widgets and LauncherPro after rebooting and entering the PIN. There is even coming a message like "LauncherPro is taking a while to load. Cancel or wait?".

Something is running bad, I think, but I do not know what.
[Galaxy S II Original Android Development] xinfinityoO:
my battery stats using turkbey rom and siyah 2.4.2

i think its pretty good
[Galaxy S II Original Android Development] xsycox:
My governor was set to conservative (because of Darknight 2.5.2). I changed it to ondemandx. Maybe it is running faster now? Reboot seemed to be better.
[Galaxy S II Original Android Development] Rampler:
It is only setcpu issue!!

With voltage control extrem, no problem
[Galaxy S II Original Android Development] Rampler:
Stupid question, what is sod?
[Galaxy S II Original Android Development] MagField:
SOD = Sleep of Death
[Galaxy S II Original Android Development] Rampler:
I know its of topic.how can I say thanks with tapatalk? I can't find the button?
[Galaxy S II Original Android Development] sn0wman1:
Hi, just to clarify, i am on Checkrom v4 with siyahKernel v2.5.1-GT with Gecko's settings on voltage control, governer is conservative and I/O scheduler is sio and have got to say my battery life has doubled, i am very impressed... :D
[Galaxy S II Original Android Development] Evollution:
lol so many versions that i cant decide what should i use :D
[Galaxy S II Original Android Development] gokhanmoral:
use 2.5.2b if you don't have any SOD

Otherwise use 2.5.2i :)

It will be available this night.

The only difference will be that I will remove undervolting which cause SOD for some users.

It will not have any other limitation unlike darkknight edition and it will still use 500mhz as sleep frequency.
[Galaxy S II Original Android Development] KennyLegend:
Or use 2.5.2i and use Ur own undervolting settings ;)

Looking forwArd to this cause i think 2.4.1 is heavy on juice!!
[Galaxy S II Original Android Development] d8389:
Any chance to change Deep sleep entering frequency by init.d ?

500 - unstable on my device.