Binary patched kernels for Pipo models

[TerryH]

In linux you need to use the dos2unix command to convert the script from windows format to unix format. In Ubuntu you need to execute:

sudo apt-get install dos2unix

to install the utility, and then

dos2unix scriptfile

where scriptfile is the filename of your script.


Sent from my M8pro using Tapatalk 2

Ahhhhhhhh!!! that's why it wouldn't run. I forgot that Windows text editors insert control codes in the file. dos2unix fixed it up and the script runs for me now.

I patched my first kernel, creating a kernel with CPU-1704 GPU-600 RAM-667 Low Voltage +25 mV for my M8 Pro. It got 19902 on Antutu and the stability test was rock solid between 85-90.

Thanks very much for this information.

[heisenberg]

Yes, but:

Which kernel do I use for patching? Can I take anyone?

[sebastianabate]

Ahhhhhhhh!!! that's why it wouldn't run. I forgot that Windows text editors insert control codes in the file. dos2unix fixed it up and the script runs for me now.

I patched my first kernel, creating a kernel with CPU-1704 GPU-600 RAM-667 Low Voltage +25 mV for my M8 Pro. It got 19902 on Antutu and the stability test was rock solid between 85-90.

Thanks very much for this information.

You should test with a 720MHz RAM and lowest voltages. I patched RileyROM 2.1's kernel with the following settings:

CPU
MHz    mV
312    800
504    825
816    900
1008    950
1200    1025
1416    1125
1704    1250


GPU
MHz    mV
133    875
200    925
266    975
366    1025
466    1100
600    1225


RAM
MHz    mV
720    1200

And is very stable (Antutu stability test between 84~91, and Antutu score 21110), and I think that this settings helped to reduce the ghost touches that I use to have when my tablet was charging with unpatched Riley's kernel and with the stock kernel (the ghost touches did not dissapear, but they are less frecuent)


Attached is my patched kernel and the modified script that only generates this patched kernel)
overclockomatic_superlow_voltage_rev1.1.pl.zip
kernel_cpu1704h_gpu600h_ddr720_superlow_voltages.img.zip

[giouncino]

Ok, so last question befor my first own kernel.

Which kernel do I use for customizing? Can I take anyone?

use the original file from rileyrom 1.3a (you can download it from the first page of this thread).

[TerryH]

You should test with a 720MHz RAM and lowest voltages. I patched RileyROM 2.1's kernel with the following settings:

CPU
MHz    mV
312    800
504    825
816    900
1008    950
1200    1025
1416    1125
1704    1250


GPU
MHz    mV
133    875
200    925
266    975
366    1025
466    1100
600    1225


RAM
MHz    mV
720    1200

And is very stable (Antutu stability test between 84~91, and Antutu score 21110), and I think that this settings helped to reduce the ghost touches that I use to have when my tablet was charging with unpatched Riley's kernel and with the stock kernel (the ghost touches did not dissapear, but they are less frecuent)

Hi Sebastianabate,

Before I did the ddr 667 kernel, I was using your ddr 792 kernel that you were using. I got slightly less than you did on Antutu (~20600). I will be going back to that kernel. I just wanted to try to do one myself.

Luckily my M8 Pro has no issues and everything works well. I can use it without issue while being charged.

So thanks again for sharing your kernel.

[fazerg]

sebastianabate, ghost touches mean poor quality of charger or it is not designed for your home mains voltage/frequency.

[sebastianabate]

Hi Sebastianabate,

Before I did the ddr 667 kernel, I was using your ddr 792 kernel that you were using. I got slightly less than you did on Antutu (~20600). I will be going back to that kernel. I just wanted to try to do one myself.

Luckily my M8 Pro has no issues and everything works well. I can use it without issue while being charged.

So thanks again for sharing your kernel.

As others had pointed out on this thread, 792 for memory is a little to high, and this frequency don't give a performance gain over 720 (actually it can play against you, becouse of the stability loss).
When I did my first patched kernels I didn't know this, but after reading other user's posts (specially from giouncino) I changed the script with my previous post settings, and everything is better now.

[sebastianabate]

sebastianabate, ghost touches mean poor quality of charger or it is not designed for your home mains voltage/frequency.

I'm aware of this, but thank you for your comment anyway. The problem is that the charger I'm using is the original one that came with the tablet, and I can't find a compatible charger for a reasonable price.

[TerryH]

As others had pointed out on this thread, 792 for memory is a little to high, and this frequency don't give a performance gain over 720 (actually it can play against you, becouse of the stability loss).
When I did my first patched kernels I didn't know this, but after reading other user's posts (specially from giouncino) I changed the script with my previous post settings, and everything is better now.

Thanks for the additional information, it's good to know.

[PipoM9Pro]

Re: Binary patched kernels for Pipo models

How about starting a new download thread for just kernels. It would be closed to comments (this thread is good for that).

We can list the tablets and have a download link to a zip file containing the most up to date kernels for that tablet.

That way we have one place to go to get the most current kernels of each of our devices.

Does that sound good to you all?

yes.... yes.... sounds a ton easier to follow.... Also is there a tweaked kernel for the M9 Pro.. I am on the RileyRom 2.0- get ready to jump to 2.1..

Dispatcher: Quad Core M9 Pro powered by RileyRom 2.0!

[heisenberg]

Yes, I think it could be the problem!

Because in deep sleep the CPU should be switched off, so it does not affect deep sleep.

Do you realy think it could help, to rise the ram voltage to 1225mV, cause in Stock rom I had the same problems (freez after entering deepsleep randomly once every week) and stock Kernel is like 1300mV for RAM?

p.s. I created my on Kernel. Thank you so much for helping the noob!!!

These are my newest settings based on v2_1 lowered the bolted. Passed Antutu with 18700 and second run 20069 (in Normal mode, the score with the original v2_1 was something like 19300, so nearly the same):
[850000, 312000],
[875000, 504000],
[925000, 816000],
[975000, 1008000],
[1050000, 1200000],
[1175000, 1416000],
[1275000, 1704000],


UPDATE: Instable - some freezes during use

[giouncino]

Do you realy think it could help, to rise the ram voltage to 1225mV, cause in Stock rom I had the same problems (freez after entering deepsleep randomly once every week) and stock Kernel is like 1300mV for RAM?

p.s. I created my on Kernel. Thank you so much for helping the noob!!!

These are my newest settings based on v2_1 lowered the bolted. Passed Antutu with 18700 and second run 20069 (in Normal mode, the score with the original v2_1 was something like 19300, so nearly the same):
[850000, 312000],
[875000, 504000],
[925000, 816000],
[975000, 1008000],
[1050000, 1200000],
[1175000, 1416000],
[1275000, 1704000],


UPDATE: Instable - some freezes during use

That is strange. It could also be an installed app the problem of freeze during sleep...
Your CPU is still lucky...
let's take a look on lowest voltages I'm currently using:
Mhz mV

312	800
504	825
816	900
1008	950
1200	1050
1416	1125
1704	1275

On 1200 we are using the same voltage!
And on 1200, 1416 and 1704 lowering the voltages more than this means a tablet unstable (already tested).

At the moment I'm using also these values for the GPU:

MHz	mV
133	875
200	900
266	950
300	975
400	1025
600	1175

if you want test them!

I konw that the GPU could work also with lower voltages.
On RK3188 datasheet is stated that the GPU rated voltages are:
380Mhz@900mV, 500Mhz@1000mV
The problem is that both of these frequencies are not used by the GPU, then I'll put these on an excel graph, and I'll modify the table above to be overlapped with the rated voltages....
I suppose it could work...

Before doing this, now I've finally found the kernel.img relevanto to the august 23rd firmware. I'm going to install it on RileyRom 1.3a to see if it could definitely enable deep sleep without loosing 3G functionality...

stay tuned!

[mad86]

Hello and thanks a lot for your hard work

I looking to cook a custom ROM with TNT utility for Pipo M7 Pro and i want to know if is it possible to replace the original kernel.img by yours oc kernel.img ?

If yes i just have to del original kernel.img and replace it by yours ?

Thanks for your answer

[giouncino]

Hello and thanks a lot for your hard work

I looking to cook a custom ROM with TNT utility for Pipo M7 Pro and i want to know if is it possible to replace the original kernel.img by yours oc kernel.img ?

If yes i just have to del original kernel.img and replace it by yours ?

Thanks for your answer

Unfortunately my kernels only work on M6pro.
But you can use the script I've attached on various post in the previous pages to generate custom kernels valid for you tablet!

[mad86]

OK thanks i take a look on this script