Siyah kernel - Dummies Guide

[ironass]

Siyah kernel, v3.3.2, is up!

"Changelog:

USB mode selection in ExTweaks (default, force mass storage, force mtp)
some tweaks & patches from upstream
GENTLE_FAIR_SLEEPERS and ARCH_POWER selection in ExTweaks
battery charging animation, service and lpm.rc from CM9
wifi country code lookup part delegated back to the driver code
Linux 3.0.34"

a) GENTLE FAIR SLEEPERS

Significance: Android UI Interactivity.

Sleeper Fairness is a concept used by CFS which treat sleeping/waiting tasks as if they were in a run queue. This implies tasks which spend most of the time waiting for an user input and such will get a fair share of CPU when they need it. Disabling Gentle Fair Sleepers could improve UI responsiveness.


b) ARCH POWER

Significance: ARM Topology Awareness.

Arch Power patch causes arch dependent power functions to be used instead of generic high resolution timer ticks and double ticks.

Source: Chinese Android Site. (gFan)

Taken fro xda forum, here.

 

[naith_kk]

Quote Link

it is safe to flash.
here is the non-technical explanation (any married man can understand this): I will not risk it because it runs on my wife's phone

I loled.

 

[1981]

Hey guys,
I have heard quite a deal about this siyah kernel.since I am new to rooting and flashing, I haven't quite got the swing of it yet.
I am using resurrection remix 2.2 now and this is my first ICS ROM experiment. Is the latest siyah kernel better than the kernel used by this ROM by default? Since I haven't changed it yet.
Thanks.

 

[Hawker]

Siyah is one of the popular ones certainly, and is performing very well for a lot of people.

However, there basically is no such thing as a "better" kernel, as what is better for one, may not be the case for another.

Try it for yourself and make your own opinions.

 

[ironass]

A few weeks ago gokhanmoral, the developer of the Siyah kernel, stated that he now had acquired an SGSIII and that his new wife had his SGSII. Therefore he would be doing less, "risky", test releases as he did not want to upset his wife's phone... or his wife, come to that!

Well, I've been on the latest Siyah release, 3.3.2, for about a week now and all I can say is... GREAT!

This kernel has performed flawlessly for me and has contributed to some excellent battery life when used in conjunction with NEATROM Lite. In fact, my battery life has never been this good, even on Gingerbread. My Android OS, on the screenie below, shows only 4%!

So, a big thank you to gokhanmoral and as far as I'm concerned, your marital life is safe!

Siyah 3.3.2+NEATROM Lite+Battery Saving Tips

 

[Wullie]

Quite fancy trying this out, I'm running my Vodafone Stock ICS, is it worth just changing the kernel in terms of battery life or is it better to put a new ROM on? I've never done anything with my phone beyond basic rooting with CF-Root.

What's the easiest way to go about it, is it just through CWM? Or Odin?

 

[ironass]

Quite fancy trying this out, I'm running my Vodafone Stock ICS, is it worth just changing the kernel in terms of battery life or is it better to put a new ROM on? I've never done anything with my phone beyond basic rooting with CF-Root.

What's the easiest way to go about it, is it just through CWM? Or Odin?

Both NEAT ROM Lite and Siyah were installed using CWM Recovery.

 

[cozins17]

Siyah 3.3.2+NEATROM Lite+Battery Saving Tips

Do you get any strange behaviour at all with yours?? Quite a few times mine gets to about 30% then will suddenly dive bomb after doing minor tasks.

Other than that mine would be equal I reckon, I'm on 3.3.2 also but just stock ROM.

Out of interest what does your Android OS show as in your stats? Mine's the only other thing thats consistently high - today its at 28%. Any idea if this is workable?

 

[ironass]

Do you get any strange behaviour at all with yours?? Quite a few times mine gets to about 30% then will suddenly dive bomb after doing minor tasks.

I did right after installing it but used the Reset Fuel-Guage Chip function in ExTweaks Plus and after 24 hours I no longer had a problem.

Other than that mine would be equal I reckon, I'm on 3.3.2 also but just stock ROM.

The NEAT ROM Lite is a big battery saver as far as I am concerned.

Out of interest what does your Android OS show as in your stats? Mine's the only other thing thats consistently high - today its at 28%. Any idea if this is workable?

My Android OS is shown in the screenshot as 4%.

 

[sflannery07]

I just hit the Reset Fuel-Gauge chip there and my battery went from 44% to 16%!!! I'll see how it fares after I charge it.

 

[cozins17]

I did right after installing it but used the Reset Fuel-Guage Chip function in ExTweaks Plus and after 24 hours I no longer had a problem.



The NEAT ROM Lite is a big battery saver as far as I am concerned.



My Android OS is shown in the screenshot as 4%.

I have Android OS & Android System :

Think I may give Neat Lite a go...

 

[ironass]

I have Android OS & Android System :

Think I may give Neat Lite a go...

Oh yes, you're right, It seems that NEAT ROM Lite doesn't display it the same as stock. It doesn't appear at all in fact.

 

[cozins17]

Oh yes, you're right, It seems that NEAT ROM Lite doesn't display it the same as stock. It doesn't appear at all in fact.

Right on cue!!
A quick couple of backup's and a reboot.........

Notice the big dive at end - from 62% in last post to 19%!!

 

[Hawker]

Its the nature of the fuel gauge beast. It requires no calibration whatsoever, but its drawback is it can go out of kilter when its power supply goes awol. On such drops it will actually creep back up slowly if left unused until it reaches its true value once more.

 

[cozins17]

Its the nature of the fuel gauge beast. It requires no calibration whatsoever, but its drawback is it can go out of kilter when its power supply goes awol. On such drops it will actually creep back up slowly if left unused until it reaches its true value once more.

Yep - well almost.

Having been out for hour without phone, ive come back & its creeped back up to 29%! Strange cause if I carry on using phone it'll go down & eventually off!

 

[romanl123]

I'd like to download a STABLE version of the Kernel for SGS2 ICS. It doesn't say which releases are stable on the site.

 

[Hawker]

I'd like to download a STABLE version of the Kernel for SGS2 ICS. It doesn't say which releases are stable on the site.

All versions of Siyah are stable. Why would you think otherwise?

3.3.2 is the pick of the bunch

 

[romanl123]

On the first site there where Beta Releases from the site:

Siyah kernel v3.0beta4, for ICS only, is up!

"changelog:

full BLN support
fixed brightness problems
added SIO(default) and VR I/O schedulers
some config changes (RCU boost, autogroup, etc)
fixed recovery problems. I advice you to recreate nandroid backups that you have created with beta versions or you

 

[ironass]

Download links from post #1.

The Siyah ICS kernel thread on xda can be found here:-

[KERNEL][ICS][ExTweaks] SiyahKernel v3.0 (beta)- no slogan yet - xda-developers

Downloads for the Siyah ICS kernel are here:-

SiyahKernel for SGS2 | "One kernel to rule them all"

 

[JohnnyJman]

I flashed this just a few days ago with NEAT, and ExTweaks.

Wow, I am very impressed. I had 1 day and 10 hours, and about 40% left before I murdered the battery with a game. Doing simple things like email and social networking doesn't seem to drain this so much now.

Very happy

 

[caloyzki]

I flashed this just a few days ago with NEAT, and ExTweaks.

Wow, I am very impressed. I had 1 day and 10 hours, and about 40% left before I murdered the battery with a game. Doing simple things like email and social networking doesn't seem to drain this so much now.

Very happy

hello mate can you please share it to me what tweaks you did on extweaks? ty.

 

[JohnnyJman]

I selected BATTERY, and ticked GENTLE_FAIR_SLEEPERS.

 

[gcobb]

I rooted my S2 a few months ago and all was good. I did the 4.0.3 update and wanted to root again. I managed to brick my phone and I managed to fix it without a jig or other things that others had tried. So I have this kernel installed now.

I'm all for using it but the right two buttons don't work now. Is this supposed to be like this?

Thanks!

 

[ironass]

I rooted my S2 a few months ago and all was good. I did the 4.0.3 update and wanted to root again. I managed to brick my phone and I managed to fix it without a jig or other things that others had tried. So I have this kernel installed now.

I'm all for using it but the right two buttons don't work now. Is this supposed to be like this?

Thanks!

Could you go to Settings > About phone > Model number... and give the information there.

 

[gcobb]

Could you go to Settings > About phone > Model number... and give the information there.

sgh-i777