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[KERNEL][CM7/MIUI/CM9/AOKP] ArindamKernel [with Backlight Fix + Power Efficiency]

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Hi folks,

I present to you ArindamKernel-CM9.


* Lots of CPU Governors + IO Schedulers (Default: Conservative + SIO)

* CPU Frequency: 120 Mhz - 1.2 Ghz (Default: 300 Mhz - 1 Ghz)

* Enabled OMAP Power Management features
(sleep_while_idle, off_mode, voltage_off_while_idle etc.)

* Backlight Fix

* Sync Bug Fix by XDA_BAM

This Kernel is for all i9003s on CM9/MIUI v4/AOKP regardless of the backlight issue and will give you better battery savings than stock CM9 kernel.

Flash using recovery. Kernel version in "About Phone" should read #6. Test and provide feedback


FOR CM7/MIUI: ArindamKernel_CM7_v7 (DO NOT USE! BUGGY! NEW VERSION COMING!)

FOR CM9/MIUI v4/AOKP: ArindamKernel-CM9-v6


NOTES:
* Flash it using CWM Recovery (Turn off Signature verification).
* Flash over a clean CM7/MIUI/CM9/AOKP.
* Please remove any backlight killer apps you might have installed.
* Please do not mirror the files.

THANKS:
* Vurrut & Dhiru for their Kernel sources.
* The i9003 devs/ex-devs and the community.
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21st April 2012, 11:41 PM |#2  
arindammanidas's Avatar
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Lightbulb Fix Source
Hi folks,

After a lot of work (and some sleepless nights ), I'm happy to announce that the infamous backlight issue has finally been nailed.

It seems that the backlight issue was being caused due to a small issue in the ramdisk.

In the stock samsung kernels, the debugfs is also mounted on /debug in addition to /d and /sys/kernel/debug.

Adding a few lines to the init.latona.rc solves the backlight issue. Something must have been pointing to /debug to turn off the backlight, but didn't find it.

@All AOSP kernel devs, please add the following to your init.latona.rc in the respective stages:

Code:
on early-init
mkdir /debug
mount debugfs /sys/kernel/debug /sys/kernel/debug

on fs
mount debugfs debugfs /debug
--------------------------------------------------------------------------------------------------

Check a stock GB ramdisk for reference.

Also mounting debugfs on /debug has another advantage. If you look at the init.latona.rc you'll find :

Code:
    # Enabling sleep in idle path
    write /debug/pm_debug/sleep_while_idle 1

    # Enabling Voltage OFF in idle path
    write /debug/pm_debug/voltage_off_while_idle 1

    # Enabling OFF mode
    write /debug/pm_debug/enable_off_mode 1

    # Enabling Smartreflex
    write /debug/pm_debug/smartreflex/sr_mpu/autocomp 1 
    write /debug/pm_debug/smartreflex/sr_core/autocomp 1
The values were not being set earlier. Now there should be better battery life.

Long Live the i9003!!!
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22nd April 2012, 12:40 AM |#3  
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Good


Sent from my GT-I9003 using xda premium
22nd April 2012, 02:09 AM |#4  
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Wink
will try it bro in an hour as i dont have battery now just 3 percent. will let u know . hope it works, keeping my fingers crossed!
22nd April 2012, 04:16 AM |#5  
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Have been waiting for this THX>THX
22nd April 2012, 04:19 AM |#6  
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Question
How to turn off signature verification in CWM recovery and then flash this kernel?
22nd April 2012, 04:23 AM |#7  
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Quote:
Originally Posted by tariq_devil

How to turn off signature verification in CWM recovery and then flash this kernel?

Select toggle signature verification.

Cheers

Sent from my GT-i9003 powered by Stable and Smooth CleanKpu rom
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22nd April 2012, 04:41 AM |#8  
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Thumbs up
Quote:
Originally Posted by bscraze

Select toggle signature verification.

Cheers

Sent from my GT-i9003 powered by Stable and Smooth CleanKpu rom

thanks. sorry if orgot to check in CWM options!! lol..

---------- Post added at 09:11 AM ---------- Previous post was at 08:55 AM ----------

bro u rocked my phone, it worked! no f**king black light now! yeay! thanks a ton bro...
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22nd April 2012, 05:55 AM |#9  
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Hmm can you share how you solved the problem? Just curious

Cheers

Sent from my GT-i9003 powered by Stable and Smooth CleanKpu rom
22nd April 2012, 08:26 AM |#10  
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Quote:
Originally Posted by tariq_devil

thanks. sorry if orgot to check in CWM options!! lol..

---------- Post added at 09:11 AM ---------- Previous post was at 08:55 AM ----------

bro u rocked my phone, it worked! no f**king black light now! yeay! thanks a ton bro...


That's great news Please mention on which ROM it worked CM7 or MIUI.




Quote:
Originally Posted by bscraze

Hmm can you share how you solved the problem? Just curious

Cheers

Sent from my GT-i9003 powered by Stable and Smooth CleanKpu rom

Yes I'll definitely share with everyone how to solve this problem but first I want to make sure this works ...

Sent from my GT-I9003 using XDA
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22nd April 2012, 09:07 AM |#11  
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Quote:
Originally Posted by arindammanidas

That's great news Please mention on which ROM it worked CM7 or MIUI.






Yes I'll definitely share with everyone how to solve this problem but first I want to make sure this works ...

Sent from my GT-I9003 using XDA

i always wished to use the MIUI but due blacklight i never stayed on it. now it works flawlessly thanks to u..
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arindam mani das, backlight, galaxy sl, i9003, kernel

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