yashsingh1/xdaforums huggingface dataset:
[Galaxy S II Q&A, Help & Troubleshooting] egps2:
Thanks for your response. I perfectly understand that the governor will scale up to meet any high demands (eg an app/game) but what I mean is for when the phone is

mostly idle

and the frequency stays at the

minimum level

. If the background processing tasks are using 50% of 200mhz and therefore 20% of 500mhz then in both of these cases the cpu is

NOT scaling up

. But it will still take a greater percentage of cycles at 200mhz because this small load (eg just reading a text) is not pushing the (80-95%) up threshold set in the governor. I.e it is not scaling to 800+ in order to complete it faster.

My initial belief was that because 500mhz completes these small background tasks using a lower percentage of cycles, it can sit in aftr/lpa for MORE time than 200mhz when doing something simple such as reading a text or static webpage. I can confirm that this difference in load is true because using the app 'cooltool' these simple background tasks use a much higher percentage cpu time at 200mhz than 500mhz but NEITHER scale up the cpu as the load is still relatively small.

Maybe this is completely wrong or I am simply not expressing myself clearly enough but basically I believe scaling up is not relevant for this usage scenario which is important because I spend a lot of time reading etc on my phone.

By your logic does that mean it is best to set min freq to the lowest stable mhz value? Eg 25 or 50mhz because I think from what I am reading that the general consensus is that aftr/lpa are useless compared to lower clock speeds in terms of battery saving.

Thank you again to everyone; I am just trying to make the most out of the Siyah kernel and would like to understand it as well. So far for me (apparently against advice) this means setting min freq to 500mhz which seems to be saving a small amount of power vs 200mhz min freq!

Quote:

from http://xdaforums.com/showpost.php?p=21889564&postcount=88

He seems to support 200 over 100 but not 500 over 200 mhz.
[Galaxy S II Q&A, Help & Troubleshooting] johnbeetee:
..sorry!...my bad:( , I think I confused you with someone else (since the post got deleted...)

you're having the wifi issue...

just read the bug report on google...

which kernel version are you on ?

are you experiencing the reboots they talk about also?

and did you try 3.2.7.1?
[Galaxy S II Q&A, Help & Troubleshooting] shishircoolin:
Try using JKay Mod, you can stop the lockscreen lag from the deluxe settings.
[Galaxy S II Q&A, Help & Troubleshooting] pikachu01:
AFTR/LPA is better than frequency scaling for 25MHz/50MHz as some clocks are gated and some power removed from the core.

Also, by your logic, if 25MHz were employed, wouldn't it allow the CPU to scale up more easily when it detects a higher load? E.g. with ondemand, you'll scale up to 1.2GHz then drop down the the appropriate level, making the task complete even faster.

The truth is, load is very much dependent on how many tasks are concurrently running. The higher the number of tasks, the higher frequency the processor needs to fill up the pipeline with instructions, thus higher input/higher output.

If there is only very little tasks, the processor doesn't need that much input/output to the pipeline as it completes the task before the pipeline is full. The clock frequency you're referring to is usually the base clock, which is how fast the system receives/outputs data through the pipeline (which by a measure since the processor is technically a time-sliced system, of how fast the system can churn through tasks). If there's low load and the processor is mostly churning out data without the pipelines being full, it only needs to receive I/O at a lower frequency.

There is also a consideration for IPC (Instructions per clock cycle) that usually runs higher, the higher the frequency is, though it is mostly limited by the pipeline/bus/memory that it plays little role in an architecture such as ARM. If it's an X86 architecture, then it plays a larger role though Intel has its own technology (Speedstep, TurboBoost, Core Cstates) that saves power when clocked at almost any frequency.

Hence, the scheduler would play a part in optimizing how fast a task can be completed. If there's only one task and the task doesn't need the processor to scale the frequency higher (since the base clock doesn't need to run faster as it'll only be filling up the pipeline with NOOPs) the task can be completed as fast as the IPC count (which in ARM doesn't really play a big role as compared to memory/bus/pipeline limitations).
[Galaxy S II Q&A, Help & Troubleshooting] ndnesh:
Hi John,

I am on kernel version 3.3.1(never tried the 3.2.8 series) - I did not try 3.2.7.1, though I did try 3.2.6.4.

I could not find 3.2.7.1 in gokhan's website.

Also, if I try to turn the wifi on, it will make my phone very unresponsive... And cause slowdowns as well. I find that even restarting the phone doesn't help as the phone keeps trying to turn the wifi on.

Only thing that helps is a factory reset which I have done almost 8 times in the last few days. (wife is getting really angry about the time I spend with my phone nowadays)

And this is somewhat permanent for me right now as whatever I do the wifi never seems to turn on ( i have even kept the screen on for 20 mins to test it.

I am at a loss here.

Any help will be appreciated.
[Galaxy S II Q&A, Help & Troubleshooting] CamoGeko:
Got some news for you, its not there. However, I have reuploaded it... mainly because for me it has the most stable reliable wifi signal. Also because loads of people are asking for it.

SiyahKernel v3.2.7.1

Sent from my 80GB CyanogenMOD 9 + Siyah ICS powered beast. Booya!!
[Galaxy S II Q&A, Help & Troubleshooting] brgroover:
one tip: 1400mhz with 1275mV (default: 1200mhz=1275mV). Change made by voltage control app. I test stability with "Stability Test 2.5", quadrant and antutu benchmarks. No issues here.
[Galaxy S II Q&A, Help & Troubleshooting] pikachu01:
Did you test it with 10 minutes of mkv playing in software decoding mode? :)
[Galaxy S II Q&A, Help & Troubleshooting] brgroover:
i dont have mkv video. Can you test for me? :)
[Galaxy S II Q&A, Help & Troubleshooting] pikachu01:
You can download these samples:

http://xdaforums.com/showthread.php?t=1054962

Each phone has its own stable values that might or might not correlate with other people's, hence its imperative that a person tests a stable voltage using their own phone.
[Galaxy S II Q&A, Help & Troubleshooting] brgroover:
tested all with sucess
[Galaxy S II Q&A, Help & Troubleshooting] dorie365:
waiting updates for siyahkernel s2
[Galaxy S II Q&A, Help & Troubleshooting] robbytf:
Siyah flash problem!!

Hello, i need help with flashing siyah kernal. If i flash siyah 3.1.2 there is no problem, but if i flash any version over 3.1.2 for example, 3.3.1, it will get stuck on the samsung boot screen and wont boot up. i am on liteningrom 3.6 and it says that siyah 3.3.1 would support it. Also i have tried flashing resurection remix v2.2 which has siyah kernal built in, and the same thing will happen it wont boot up. But if i flash siyah 3.1.2 on the resurection remix with odin, there is no problem and boots up normally. does anyone know why i cannot flash any version of siyah above v3.1.2??

Thanks :)
[Galaxy S II Q&A, Help & Troubleshooting] pikachu01:
Try wiping your extweaks (in recovery) and wiping init.d, and then try booting again. If that fails, try wiping /data (factory reset) instead.

You might have scripts that tweak the voltage/governor/system values that are different for a new version of Siyah.
[Galaxy S II Q&A, Help & Troubleshooting] willyrabindra:
Base on my experience maybe u can try....always reset extweak, clear init and wipe cache before upgrade or downgrade siyah kernel...
[Galaxy S II Q&A, Help & Troubleshooting] naveediftikhar:
or you can test your uv's with this method i jus found with the help of droidphile...

http://xdaforums.com/showthread.php?t=1684616

pikachu can u take a look at this can verify if its useful as it did wonders for my uv stability!
[Galaxy S II Q&A, Help & Troubleshooting] Namoi:
Thanks, exactly what i was looking for... but (there's always a but), it seems that those files doesn't survive a reboot...

Any clues ?
[Galaxy S II Q&A, Help & Troubleshooting] ndnesh:
I have tried this kernel! Thank you so much, however, it still doesnt fix the issue for me. My Wifi still fails to connect.

What is going wrong?
[Galaxy S II Q&A, Help & Troubleshooting] OGroteKoning:
Try a fixed IP address on your router and reboot both rooter and phone
[Galaxy S II Q&A, Help & Troubleshooting] bundi22:
does anyone have root/su permissions working on the secondary rom? mine only work on primary rom
[Galaxy S II Q&A, Help & Troubleshooting] johnbeetee:
..you are totaly right !... (I don't reboot a lot, so it didn't dawn on me until now)

I'll have to look into that...

(I have a vague idea: it probably has to do with the checksum trick that GM built in to detect a change of kernel, and resetting extweaks based on that and that checksum was generated with his original files, and finding altered files now it will reset extweaks at reboot if you (we) replace those , so I'll have replace that file also for it to survive a reboot)

for now: copying them back (and making backup copies of your personal settings (in /data/.siyah) ) will have to do until I have time to check it out.
[Galaxy S II Q&A, Help & Troubleshooting] Namoi:
Thanks,

Patiently waiting ;)

By the way, how does the profiles works ? For example if i load performance and make changes in Extweaks, will it replace the performance settings or is it stored in a "custom" profile ? In fact is it possible to create our own named profiles ?

Thanks again for your time.
[Galaxy S II Q&A, Help & Troubleshooting] johnbeetee:
The main profiles (default) are located in /res/customconfig (those you replace with the changed ones)

whenever you change a setting, one of these (depending which is active) is copied with the changed values to /data/.siyah (and these are your personal settings).

if you reset extweaks profiles, the ones in /data/.siyah are completely replaced with the ones in /res/customconfig, so that way you're back to defaults.

in /data/.siyah there's a checksum file .ccxmlsum, that judging by it's name, is the checksum of the xml file, that I changed.

so I think this is the one I need to regenerate, based on the new xml file to let it survive a reboot

if you're familiar with xml config files, you can change any layout and function in extweaks (you'll have to know a little bit of scripting, because extweaks make use of action files which are scripts. these are in /res/customconfig/actions.

the main one you'll use is 'generic' which will echo a value to the corresponding file, which is used to change a lot of settings in siyah kernel

so with this knowledge, you can use extweaks for a whole lot of other usefull things...

edit: concerning your own named profiles , I once copied a profile in /data/.siyah and gave it anothre name, and that way you can create your own set of settings ; it won't survive flashing the kernel, and I think it will be deleted also if you reset extweaks profiles....
[Galaxy S II Q&A, Help & Troubleshooting] brgroover:
3+ hours, no issues
[Galaxy S II Q&A, Help & Troubleshooting] Namoi:
Thanks for your clear and kind explanation.
[Galaxy S II Q&A, Help & Troubleshooting] naveediftikhar:
awesome man..thx for confirming...could paste ur uvs here!
[Galaxy S II Q&A, Help & Troubleshooting] mark2222:
These gave me 3+ hours of screen time for 50% battery today on Siyah 3.7.1, gpu 100@850, 160@900, 267@950 using pegasusq and sio and 1000MHz max profile when not charging (800MHz < 50% battery). It's working great, best I've tried, also I am on wanamlite 12 with wall grey theme.

1200000 1150

1100000 1100

1000000 1050

900000 1000

800000 950

700000 950

600000 925

500000 925

400000 900

300000 875

200000 825

100000 800
[Galaxy S II Q&A, Help & Troubleshooting] johnbeetee:
...sad news....

I've looked at the whole filesystem used by siyah, and the problem is not the checksum, what I thought initially, but it seems that /res/customconfig directory is part of the ramfs which means it is recreated every time at boot with the kernels internal version (data), so that's why it won't stick...

I now need to know how root-explorer gets /res/customconfig to mount RW (which commands/tricks does it use)

so if anyone can give me hint ??? :confused:

that way I can at least make script to copy those files to their destination,

..otherwise it will be manually the only way to go (for now...):(
[Galaxy S II Q&A, Help & Troubleshooting] brgroover:
1400 - 1275mV

1300 - 1275mV

1200 - 1275mV

1100 - 1225mV

1000 - 1175mV

900 - 1125mV

800 - 1075mV

700 - 1025mV

600 - 1000mV

500 - 975mV

400 - 975mV

300 - 975mV

200 - 950mV

all voltage control app stock, except 1400, 1300 steps (undervolting)
[Galaxy S II Q&A, Help & Troubleshooting] Namoi:
Hmmh, could a pm to gokhanmoral would help? I know he doesn't give up on SGS2, but he is right now on other things, and will be for sure, which is totally inderstandable, keeped busy with the GS3 kernel.
[Galaxy S II Q&A, Help & Troubleshooting] paieneso:
I can't install a different kernel after Siyah

Hi everyone,

I have VK rom v5.1 installed running Siyah kernel 3.3.1 with some tweaks (I mean using extweaks app) and I've tried to install a new kernel, just to see which one is better batterywise and there's no way, just no way. After wiping cache, dalvik and also clearing init.c folder (which is usually done by defect when installing a new kernel), I have tried with NEAK 2.0.5x and 2.0.6x and nothing. I've also tried with speedmod k3-20 and nothing either, it wont boot past the first Samsung logo!!! What can I do??? Any ideas?

Cheers
[Galaxy S II Q&A, Help & Troubleshooting] Tye:P:
What do you mean by tweaks?

I would wipe cache, dalvik and clear init.d folder.

It might be a good idea to post this in the NEAK thread.

edit - If you can't get past Samsung logo you might need to flash a new kernel with odin. Perhaps Siyah then perform the steps above, reset ExTweaks then try NEAK or whatever again. Check NEAK thread for issues with this ROM/kernel combo.
[Galaxy S II Q&A, Help & Troubleshooting] paieneso:
Yes I've done all that.

(Just edited my post. Cheers)
[Galaxy S II Q&A, Help & Troubleshooting] Tye:P:
So you're not stuck at Samsung logo?

I'm guessing if you could do the above steps you must not be. Wiping data is the only other thing that I can think of, but of course you'll lose your apps. Are you sure NEAK works/doesn't have any issues with this ROM?

Did you clear these things before or after you flashed NEAK? Wiping everything you're prepared to and then re-flash NEAK is all I can really think of.
[Galaxy S II Q&A, Help & Troubleshooting] paieneso:
I've also done factory reset and reset the extweaks profiles that I've changed, but still nothing, It won't pass the Samsung logo.

(Just another thing. I did change the dpi from 240 to 210 on the build.prop which was worked like a charm and updated from Siyah 3.2.8 to 3.3.1. Thinking that it could be a problem of any kind and desperate as I was I tried as well changing it with no improvement at all).

All of it b4 flashing of course.

The rom is ICS (check the link:

http://xdaforums.com/showthread.php?t=1559009), and the kernels used are supposed to be alright with it, both of them for Sammy and ICS, am I wrong?

Cheers
[Galaxy S II Q&A, Help & Troubleshooting] vizdak:
Try this solution: http://xdaforums.com/showpost.php?p=27020685&postcount=1324
[Galaxy S II Q&A, Help & Troubleshooting] BrandoHD:
You may have to consider wiping data and trying again, look at pikachu's posts, it may have something to do with data corruption from flashing a siyah kernel that had some stuff from n7000 merged

Samsung Galaxy S II Tapatalk2
[Galaxy S II Q&A, Help & Troubleshooting] robbytf:
i have tried wiping extweaks, wiping init.d then flash and it goes past the samsung screen which then gets a black screeen and stays like that until i take the battery out then to get into download mode then flash siyah 3.1.2. i have also tried flashing "gs2Wiper" before i flashed the siyah 3.3.1 and the same thing would happen, it will get a black screen. Is there any other options on flashing it? Thankyou

---------- Post added at 03:37 AM ---------- Previous post was at 03:30 AM ----------

i have tried this but it goes past the samsung screen which then gets a black screeen and stays like that until i take the battery out then to get into download mode then flash siyah 3.1.2. Is there any other options on flashing it? Thankyou :)

also i have tried using these steps http://xdaforums.com/showpost.php?p=27020685&postcount=1324 and when i reboot recovery it would just turn off and get stuck on the samsug boot screen.
[Galaxy S II Q&A, Help & Troubleshooting] johnbeetee:
normally you would not run into so much trouble flashing roms, kernels and stuff

if you've tried all the simple solutions mentioned above and still no game, if it were me I'd do a full wipe (wipe everything system data cache dalvik), flash an official stock and start all over again (rooting (cf-root), flash rom, kernel and keep track of everything, just to know where it goes wrong (if it goes wrong)

searching for a compound or combined mix of errors can be very tedious and frustrating
[Galaxy S II Q&A, Help & Troubleshooting] bundi22:
GUYS root/su isnt working on the seconday rom, any solutions??
[Galaxy S II Q&A, Help & Troubleshooting] johnbeetee:
recovery swap rom

use extweaks to remove/install root (auto install)

test to make sure it works

recovery swap back

(takes some time, but if this doesn't work then there's something else wrong... )
[Galaxy S II Q&A, Help & Troubleshooting] sam142000:
Guys a kernel wakelock named "suspend_backoff" drained the whole battery last night. Please help me how to correct this.
[Galaxy S II Q&A, Help & Troubleshooting] Hibbbo:
Same for me, also unable to connect to LEAP enterprise Wifi with 3.3.1...

SpeedMod, CF-Root e.g. are working fine :(
[Galaxy S II Q&A, Help & Troubleshooting] Blondiepowa:
Guys,

do you know is Siyah will be updated later ? :confused:
[Galaxy S II Q&A, Help & Troubleshooting] ballmead:
Yes, gokhan has said so in the development thread.

He is busy atm.
[Galaxy S II Q&A, Help & Troubleshooting] Mahdi786:
Hi robbytf, have you tried restoring a previous backup?
[Galaxy S II Q&A, Help & Troubleshooting] runedrune:
So me not being able to is a bug? Haha. Nice.
[Galaxy S II Q&A, Help & Troubleshooting] androidkid311:
Hahaha!! I'm sorry...I really did try not to laugh l but if you do flash it which everyone would advise not to...let me know what happens xD
[Galaxy S II Q&A, Help & Troubleshooting] pikachu01:
It's not a bug, every touch you perform scales the CPU up to 800MHz.
[Galaxy S II Q&A, Help & Troubleshooting] runedrune:
So I was right then? :o
[Galaxy S II Q&A, Help & Troubleshooting] SPBoss:
GM i just wanted to say thanks! latest kernel works perfectly with ics remix 1.9 its so smooth and responsive :D i was curious as to what rom you your using? :)
[Galaxy S II Q&A, Help & Troubleshooting] gokhanmoral:
changes weekly.

I am now on stock lp7 + cm9 (an old nightly)

but I prefer samsung roms (stock or custom) as for my primary rom.
[Galaxy S II Q&A, Help & Troubleshooting] :
I think he didn't exactly know what we were talking about. I can even set my cpu to max 200mhz and it won't cross that line, no matter what I do.
[Galaxy S II Q&A, Help & Troubleshooting] pikachu01:
You mean me or the other dude :S
[Galaxy S II Q&A, Help & Troubleshooting] runedrune:
Pretty sure he meant you but I don't think I know what's going on anymore. :)
[Galaxy S II Q&A, Help & Troubleshooting] Boat Traveller:
Silly question : Should I charge my GS2 to 100% before flashing new kernel ?
[Galaxy S II Q&A, Help & Troubleshooting] bokil:
At least more than 50% ...just to b on safer side :)
[Galaxy S II Q&A, Help & Troubleshooting] :
Well... The official version is: yes.

I personally wouldn't worry if I had more than 40% left.
[Galaxy S II Q&A, Help & Troubleshooting] coloxim:
I've always the same problem...my phone doesn't stay in deep sleep too much..with another kenerl stay in deep sleep much more..in 3 hours stay awake 1 hour...with fluxi stay awake 1 in 23 hours!!!

Inviato dal mio GT-I9100 con Tapatalk 2
[Galaxy S II Q&A, Help & Troubleshooting] Boat Traveller:
I just flashed Siyah 3.2.4 and saw that the default governor is Pegasusq.

Can someone tell me what are the advantages and disadvantages of this governor ?

Thanks !
[Galaxy S II Q&A, Help & Troubleshooting] bokil:
We are all trying to find the same thing :D

Some expert will guide you with this i think.
[Galaxy S II Q&A, Help & Troubleshooting] sinancetinkaya:
the code says

if the governor name is one of these "pegasusq", "hotplug", "assplug"

disable the stand-hotplug
[Galaxy S II Q&A, Help & Troubleshooting] johnbeetee:
I guess you don't like to search and read a lot, so here's the condensed version:

most governor's scales the processor's speed (frequency) depending on the load

(going up on more load).

kernels on multi-processor sytems have an independent mechanism to turn on (and off) the extra core's (processors) when needed depending on load.

pegasusq combines these two mechanism in one governor, so when scaling it can up the freq. and also turn on extra core's along the way.

advantages:

these controls being integtated together, we hope the efficiency and effectiveness will be more, then the two apart from each other.

disadvantage: more parameters to play with, in finding our own individual sweet spot's (but that's the whole fun of it all, isn't it? :) )

compare it if you will with the difference between an 8-valve 4 cilinder engine, as compared to a 16-valve one.

the 16-valve can give you more power and acceleration, but used differently it can also be more fuel-efficient....

If you're more curious now, you can read up on it in Droidphile's page, and google some more:

http://xdaforums.com/showpost.php?p=24233103&postcount=3
[Galaxy S II Q&A, Help & Troubleshooting] Geeza1966:
Default now but with extweaks etc you can change. Experiment.
[Galaxy S II Q&A, Help & Troubleshooting] spaxx24:
Since 3.2.2 my screen is to dark with auto birghtness, specialy when its bright (outside)

3.2.1 is much better.

I have modified the value recomended (min_gamma)in teh blog but I feel there is no difference... What should I do to change that?

Also: I cant modify the auto-brightness values in settings, if i change a value and press save it gets back to the one before when I leave the menu...
[Galaxy S II Q&A, Help & Troubleshooting] cavaliere06:
What about ntfs??

Hi, I know a lot of experimental patches where removed in v3.3.1, but does anyone knows if ntfs mounting was removed, since I can't mount my ntfs drive.

Any clues or is just that i'm doing it wrong??
[Galaxy S II Q&A, Help & Troubleshooting] SergeF1:
He now have the SGS3 and give the SGS2 to his wife, so you can imagine that it will be difficult to update, he have to try things on a phone and now his wife have it.

He's about to release his kernel for the SGS3...so i don't think Siyah will receive more features in SGS2 version...

I will go with Fluxxi, which is been great so far with Paranoid and CM9.
[Galaxy S II Q&A, Help & Troubleshooting] baza14:
There is that accelerometer issue.

Odesláno z mého GT-I9100 pomocí Tapatalk
[Galaxy S II Q&A, Help & Troubleshooting] sharp87:
How is the battery life after flashing siyah 3.3.1 and any known issues
[Galaxy S II Q&A, Help & Troubleshooting] powermax91:
what is the name of this app ?
[Galaxy S II Q&A, Help & Troubleshooting] LegendZenify:
Badass battery monitor.
[Galaxy S II Q&A, Help & Troubleshooting] minidou-77:
GM is back to S2 !!

3.3.2 changelog online ;-)