[Galaxy Tab 4 Original Android Development] CTXz:
Hello users with your T230 / NU. While I didn't do a custom ROM (insert sad ohhhh sound here), I did create this small custom kernel.

Currently I reached my deadline because my friend needed his tab back. I can't promise if this project continues or not, but I will keep you up with news! I thank you all for being awesome and I appreciate every download! More info on my comment on page 8 of this thread.

You must have root for some features (ex. Overclocking)

Thanks list : [MENTION=5864662]moonbutt74[/MENTION], [MENTION=4644109]g_ding84[/MENTION], [MENTION=4716493]laufersteppenwolf[/MENTION], [MENTION=6382266]KouenHasuki[/MENTION], [MENTION=4401403]friedrich420[/MENTION], [MENTION=4754591]TheFerhatKing[/MENTION]

The reasons are mentioned in the 2nd comment of this thread. I beg you to take a look and give them a thanks for what they have done! They deserve it !

Disclaimer : I am not responsible for any damage dealt to the device or SD cards, nor am i responsible for the breakout of ww3 or a zombie Apocalypse. REMEMBER IT'S YOUR CHOICE TO FLASH THIS KERNEL

Now to the facts:

If you use the Odin version and your cpu settings don't save / stick after exiting your preferred kernel tweak app, download the custom recovery version!

Current features in kernel (v4.0) :

- removal of dvfs

- overclock to 1344mhz

- custom I/O schedulers

- custom CPU governors

Changelog :

v4.0 - Ported dancedance, adaptive, lionheart (may have a tiny risk of crashing but gave me the best gaming experience so far) and wheatley govs from [MENTION=4401403]friedrich420[/MENTION] 's N4 TMO AEL Kernel

v3.0 - Ported row, sio and vr I/O Schedulers from [MENTION=4716493]laufersteppenwolf[/MENTION]'s werewolf kernel and reverted cpu clockspeed to 1344Mhz

v2.2 - Overclock from 1183 Mhz (or 1248/1344 for users with V2.0/2.1) to 1444 Mhz -Warning - this may run unstable on your device. I recommend using v2.1

v2.1 - Overclock from 1183 Mhz (or 1248 for users with V2.0) to 1344 Mhz

v2.0 - Overclock from 1183 Mhz to 1248 Mhz

v1.0 - removed DVFS (Dynamic voltage and frequency scaling)

What do the changes do :

Ported CPU governors - A CPU governor in Android controls how the CPU raises and lowers its frequency in response to the demands the user is placing on their device. Governors are especially important in smartphones and tablets because they have a large impact on the apparent fluidity of the interface and the battery life of the device over a charge. More information here http://androidmodguide.blogspot.cz/p/blog-page.html

Ported I/O Schedulers - Input/output (I/O) scheduling is a term used to describe the method computer operating systems decide the order that block I/O operations will be submitted to storage volumes. More information here : http://androidmodguide.blogspot.cz/p/io-schedulers.html - If you use no-frills CPU control, the app might freeze. If so, use kernel toolkit

removal of DVFS - Dynamic voltage and frequency scaling can lead to extreme lag after running heavy tasks such as gaming for some time. This feature also cheated on different benchmarks, that show allot higher results than the phone actually preforms like in everyday apps. A restart would be the only fix

CPU overclock - This will higher your cpu clock speed higher than factory set and will boost your processor speed. Warning : Since overclocking is beyond factory setting, there always is a slight risk that it can damage your CPU, with that said, it can shorten the life span and will make your device usually run hotter. It may also drain more battery.

Proofs

removal of DVFS - While I sadly don’t have a 100% proof that it is really disabled since I currently don't know how to, chances are high that it is disabled since the menuconfig displayed it as off. Also there was no sign of dvfs actions in a log running things from benchmarks to 3d games. [MENTION=4644109]g_ding84[/MENTION] does have a few more proofs in the comments.

CPU overclocking - 100% proof on over clocking apps that confirm the clock speed does indeed exist in the kernel. It also gives a improvement in mainly the cpu section of benchmarks.

Ported I/O Schedulers - 100 % Kernel tweak apps (preffered kernel toolkit) will show those I/O's

Ported CPU governors - 100 % Kernel tweak apps (preffered kernel toolkit) will show those governors

Github (please read all comments for the commits if there are any)

https://github.com/ctxgaming/android_kernel_samsung_degaswifi

Tested on:

Samsung Galaxy tab 4 T230NU

Instructions to flash in 1st commend of this thread

Download link for kernel :

Custom Recovery version (Recommended)

v4.0 - http://www.mediafire.com/download/7lpg2p5k0f49fqi/4.0.zip

v3.0 - http://www.mediafire.com/download/6uihelip6nmgahe/3.0.zip - If you use no-frills CPU control, the app might freeze. If so, use kernel toolkit

V2.2 -http://www.mediafire.com/download/68vxidyxvz43a58/CPU-Tweaks-V2.2.zip - Warning - this may run unstable on your device. I recommend using v2.1 or 3.0+

v2.1 - http://www.mediafire.com/download/j2h799vi6dv7j1l/CPU-Tweaks-V2.1.zip by [MENTION=4716493]laufersteppenwolf[/MENTION]

v2.0 - http://www.mediafire.com/download/94j5v7p2uoe52tb/CPU-Tweaks-V2.0.zip

v1.0 - https://www.dropbox.com/s/3opaikamkewfpgo/custom_kernel_CTZx.zip?dl=0 converted by [MENTION=4644109]g_ding84[/MENTION]

Odin image:

v4.0 - http://www.mediafire.com/download/rdm9oj5ccaocjxq/boot.img.tar.md5

v3.0 - http://www.mediafire.com/download/97oq0da5nyf527v/boot.img.tar.md5 - If you use no-frills CPU control, the app might freeze. If so, use kernel toolkit

v2.2 -http://www.mediafire.com/download/9cr9zzs7i3i5qi7/boot.img.tar.md5 - Warning - this may run unstable on your device. I recommend using v2.1 or 3.0+

v2.1 - http://www.mediafire.com/download/43mpnyiv67wflde/boot.img.tar.md5 by [MENTION=4716493]laufersteppenwolf[/MENTION]

v2.0 - http://www.mediafire.com/download/w1kacfo4yip87d7/boot.img.tar.md5

v1.0 - http://www.mediafire.com/download/pn8asxz2px69px7/boot.img.tar.md5

If you decide to rollback to stock (links by [MENTION=4644109]g_ding84[/MENTION]) :

STOCK KERNELS - T230 T230NU & T231

T230 KERNEL

OC1 : https://www.androidfilehost.com/?fid=95916177934547294

MD5 SUM : 8e3d724a239b159c608d547eeea0fcb6

OD2 : https://www.androidfilehost.com/?fid=24052804347799717

MD5 SUM : 0141fc2445697e05a2225308a6d1b76e

T230NU KERNEL

OC1 : https://www.androidfilehost.com/?fid=95916177934547295

MD5 SUM : ec1367bad15c1b96aa0d1180448c47a7

OD1 : https://www.androidfilehost.com/?fid=24052804347799719

MD5 SUM : 785546f2c2b1e472c3ca386b7d2fffad

Contributors

CTXz, laufersteppenwolf

Source Code: https://github.com/ctxgaming/android_kernel_samsung_degaswifi

Kernel Special Features: Removal of DVFS, Overclocking, New I/O schedulers, new CPU governors

Version Information

Status: Testing

Created 2015-05-06

Last Updated 2015-05-11

XDA:DevDB Information

CPU Tweaks for Tab 4 T230 / NU, Kernel for the Samsung Galaxy Tab 4

Contributors

CTXz, laufersteppenwolf

Source Code: https://github.com/ctxgaming/android_kernel_samsung_degaswifi

Kernel Special Features: Removal od DVFS and Overclocking

Version Information

Status: No Longer Updated

Created 2015-05-06

Last Updated 2015-07-01

XDA:DevDB Information

CPU Tweaks for Tab 4 T230 / NU, Kernel for the Samsung Galaxy Tab 4

Contributors

CTXz, laufersteppenwolf

Source Code: https://github.com/ctxgaming/android_kernel_samsung_degaswifi

Kernel Special Features: Removal od DVFS and Overclocking

Version Information

Status: No Longer Updated

Created 2015-05-06

Last Updated 2015-08-04

XDA:DevDB Information

CPU Tweaks for Tab 4 T230 / NU, Kernel for the Samsung Galaxy Tab 4

Contributors

CTXz, laufersteppenwolf

Source Code: https://github.com/ctxgaming/android_kernel_samsung_degaswifi

Kernel Special Features: Removal od DVFS and Overclocking

Version Information

Status: No Longer Updated

Created 2015-05-06

Last Updated 2015-09-01