[KERNEL] CoolKernel 1.0 with system patches - Sony Xperia M4 Aqua

Hello,
this is a kernel tuned on battery life. It is supposed for stock M4 Aqua Android 5.0 version. Should work on all stock based rom, on all 23xx devices if bootloader is unlocked.
Please be careful and make a backup.
Tested devices
- Sony Xperia M4 Aqua E2306 OS: Sony Stock 5.0 26.1.A.3.111 :good:
- Sony Xperia M4 Aqua E2306 OS: Sony Stock 5.0 26.1.A.3.120 :good:
- Sony Xperia M4 Aqua E2333 OS: Sony Stock 5.0 26.1.B.3.109 :good:
Install instructions:
- boot into recovery
- backup full system (boot and system to restore previous version; data to avoid data loss)
- flash the zip file (see second post attachment)
Revert instructions
- restore boot, system
Additional instructions:
- for low power mode (only use little cluster, long battery life, but poor performance, ok for browsing, etc. to survive a desert holiday):
-- echo 1 > /sys/module/cluster_plug/parameters/low_power_mode
- for normal mode:
-- echo 0 > /sys/module/cluster_plug/parameters/low_power_mode
- reboot will restore normal mode (you can use script tools from market to make buttons to switch easily)
- the following script can be used with $cripter app (run as root) so you can make a toggle icon to change between modes:
Code:
#!/system/bin/sh
echo 1 > /sys/module/cluster_plug/parameters/active
STATE=$(cat /sys/module/cluster_plug/parameters/low_power_mode)
if [ $STATE -eq 1 ]
then
echo 0 > /sys/module/cluster_plug/parameters/low_power_mode
else
echo 1 > /sys/module/cluster_plug/parameters/low_power_mode
fi
echo "low power consumption"
cat /sys/module/cluster_plug/parameters/low_power_mode
init.d support:
- this kernel brings you init.d support, so no need to use other scripts to enable it
-- busybox needs to be installed in /system/xbin
Code:
mkdir /system/etc/init.d
chmod 755 /system/etc/init.d
(put a script there)
chmod 755 /system/etc/init.d/00_myscript
Please report back if it works or not with your device info.
Credits:
@kaiiori: thanks for your "xperia M4 high temperature Decrease"; i based my scripts on your idea (but took them from another device)
@vinay: thanks for help with kernel assembly
for cluster_plug: all guys which worked on it in CM development
Kernel sources:
https://github.com/cyclon1978/m4aqua
Greetings,
Andreas

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Changelog:
1.001 [Attachment ckp-1.001.zip]
- undervolt to reduce heat
1.000 [Attachment ckp-1.000.zip]
- added cluster_plug
- msm_performance.c updated to avoid problems with cluster cache
- modified system scripts to make ondemand work (as default), enable cluster cache (also as default)

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Let me see if i understand: this kernel works on locked bootloader too?? I've just flash it with recovery??

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romeo_charly said:
Let me see if i understand: this kernel works on locked bootloader too?? I've just flash it with recovery??
Click to expand...
Click to collapse
I don't know... locked bootloader checks kernel signature on some xperia devices. You have to try it
The recovery image is definitely not checked, so why should they check the kernel partition... please report back if it works.
To revert if you get bootloop just enter recovery and restore kernel (plus system to revert all changes).
Thanks for testing!

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Working on E2306 version with 26.1.A.3.120 firmware!

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wich are the features of this kernel?? cluster_plug works turning off and on little cluster automatically?

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Works on E2306 on 3.111!

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donalberto17 said:
wich are the features of this kernel?? cluster_plug works turning off and on little cluster automatically?
Click to expand...
Click to collapse
Exactly. The little cluster is turned off if not required so the device can last longer. Performance should not be affected.

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It didn't work for me on E2306 on .311 My device doesn't turn on 8|

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I tried installing it on E2303 and now my phone it doesn't start anymore...it keep restarting after xperia logo...
What can i do? i have bootloader locked and No at allow unlock status...
Is my phone dead?

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Try to flash the fw with flashtool... It should work
Sent from my E2303 using Tapatalk

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donalberto17 said:
It didn't work for me on E2306 on .311 My device doesn't turn on 8|
Click to expand...
Click to collapse
Your bootloader is locked?

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vic604 said:
Try to flash the fw with flashtool... It should work
Sent from my E2303 using Tapatalk
Click to expand...
Click to collapse
or just enter recovery and restore kernel / boot from the backup you made.

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cyclon1978 said:
or just enter recovery and restore kernel / boot from the backup you made.
Click to expand...
Click to collapse
I can't enter recovery, the phone restarts before led turn on ...
What i did not mention, is that when i have made my backup and flash the kernel, i have received some messages with red text, something about "firmware..."
And after flashing, i made a cache and dalvik cache clean... should be something related to this?

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vyrussu said:
I can't enter recovery, the phone restarts before led turn on ...
What i did not mention, is that when i have made my backup and flash the kernel, i have received some messages with red text, something about "firmware..."
And after flashing, i made a cache and dalvik cache clean... should be something related to this?
Click to expand...
Click to collapse
If bootloader is locked you can use sony software to repair it. After that you can install recovery and restore your backup / data.
The cache/dalvik cache clean is not required, but wont break anything. The red text... i dont know...

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I'll try later to reinstal original software with Sony Companion or by flashtool and let you know if i succeeded, now i'm at work...
The message in red was something like: cannot access firmware partition ... maybe because i have locked BL

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using with rooted, bl unlocked version of e2303 (26.1.A.3.111). i don't have any problems right now. overall performance seems to be improved, so thank you sir.
what i want to ask is this, i am a link2sd user and i want to improve app opening speeds, how can i do this with this kernel installed?
(i am using a korean company's micro sd with r/w speeds of 95/90 by the way)

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lazarusxd said:
using with rooted, bl unlocked version of e2303 (26.1.A.3.111). i don't have any problems right now. overall performance seems to be improved, so thank you sir.
what i want to ask is this, i am a link2sd user and i want to improve app opening speeds, how can i do this with this kernel installed?
(i am using a korean company's micro sd with r/w speeds of 95/90 by the way)
Click to expand...
Click to collapse
sdcard speed tweaks are possible, it's a question of time and priorities...

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Ok, so i managed to flash my phone with Sony Companion and now everything is ok... so it seems that this kernel is not compatible with phones who have locked boot-loader... unlucky me...
Anyway, keep the good job!
Off:
Anybody knows a way to unlock boot-loader if it has status: Unlock bootloader allowed: No ??
Only the carrier from witch the phone is bought can unlock this?

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It worked for me e2333 unlocked bootloader
I have a question, could you add wake gestures to kernel?