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[i9100] How to get a fast and smooth running Galaxy S2 GT-i9100 with Nougat 7.1.1

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By Nobby1960, Senior Member on 8th May 2017, 05:48 PM
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A fast, smooth running Galaxy S2 GT-I9100 with Nougat 7.1.1, is it possible? Sure, but it is best not to use the latest ROM build. After many tests and comparisons of various Nougat ROMs based on LineageOS I've found out this. The development of the ROM is ongoing very quick, but it's made for many devices. The performance of the CPU is not taken into account. Our S2 is now some years old (since 2011) and has only a CPU with two cores. Standard today is at least a phone with quad core CPU.

Comparing a Nougat 7.1.1 ROM from February 2017 with a current build clearly shows you that the older one runs much faster. This is mainly noticeable when scrolling or if you open apps. In the current ROM there are often lags, it simply needs more performance.

To get the maximum out, a few tweaks with a modded Kernel Adiutor from XDA are necessary, the CPU frequency is set to minimum and maximum 1200 MHz. The battery drain of course is a bit higher - not much, but you have more joy with a smooth running S2.

What do you need for this?

I did made the best experience with AICP 12.1 ROM, build in February 07 2017. you get it here. It runs very stable for daily usage. Only the camera app Snap.apk is buggy at video recordings. You can change this by installing the latest one in my attachment.

The modded XDA Kernel Adiutor is attached too.

The CPU and ondemand governor settings (CPU Governor Tunables) you see on my screenshots. Make sure that the "Apply on boot" toggle is set to on.
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Attached Files
File Type: apk Kernel_Adiutor_Mod_XDA.apk - [Click for QR Code] (3.47 MB, 456 views)
File Type: apk Snap.apk - [Click for QR Code] (4.93 MB, 298 views)
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12th May 2017, 07:28 AM |#2  
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Can you tell me where I could find jelly bean compatible CWM recovery ?
12th May 2017, 10:03 PM |#3  
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Quote:
Originally Posted by trolliumBorate

Can you tell me where I could find jelly bean compatible CWM recovery ?

Jelly Bean has its own, "built-in" recovery. Unfortunately, I am not aware of whether you can take another recovery for it. I know there is a flashable CWM recovery via Odin for the S2 (I have it here). But this is intended for flashing custom ROMs.
16th May 2017, 04:04 PM |#4  
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@Nobby1960
Hi, good instruction.
Useful article.
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7th July 2017, 03:36 PM |#5  
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Quote:
Originally Posted by trolliumBorate

Can you tell me where I could find jelly bean compatible CWM recovery ?

I allways used this file "PhilZ-cwm6-XXLSJ-OXX-4.00b21-signed-JB.zip" and installed it via stock Recovery. (no waranty void message after rebooted system). Copy this file on your SDCard, reboot in Recovery Mode and flash it. Now you can keep runing your device on stock ROM or you can install a custom one with this recovery.
Attached Files
File Type: zip PhilZ-cwm6-XXLSJ-OXX-4.00b21-signed-JB.zip - [Click for QR Code] (7.86 MB, 110 views)
9th July 2017, 07:48 AM |#6  
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The link to AICP 12.1 ROM is not working; I get 404 Not Found.
9th July 2017, 02:50 PM |#7  
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Quote:
Originally Posted by Franklin46

The link to AICP 12.1 ROM is not working; I get 404 Not Found.

Thank you for information. The ROM is no more available on the AICP server. I did upload it to a one click hoster (upload.net) The link in my first post works now again.
16th July 2017, 08:50 AM |#8  
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Would you still recommend this rom today ? or would the official lineage 7.1.2 be better than this now ?
16th July 2017, 12:59 PM |#9  
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Quote:
Originally Posted by trolliumBorate

Would you still recommend this rom today ? or would the official lineage 7.1.2 be better than this now ?

Compared with the latest AICP 12.1 build from 07/10 it's not necessary to jump back to this older version. The performance from all latest Lineage based ROMs became better. The only thing I use the Kernel Adiutor with the performance settings from my first post. I think you can also use the latest official plain vanilla Lineage 7.1.2.
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