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There is a new very good perl script that patches an original kernel to use higher frequencies as the manufacturer made in the original ROM: http://www.freaktab.com/showthread.php?7150-rkpatchomatic-tool-overclock-vsync-fix-any-binary-rk3188-kernel!
All credits go to @phjanderson!
I modify the perl script to overclock the M6 max and go as close as possible to the original steppings. This version I append runs very fine at my Pipo M6 max.
These are the original values made by Pipo:
These are the values I made:
Antutu scores with 18565, Quadrant with 5467 and I get 37,1 FPS from Epic Citadell at High Quality with full Resolution. This gets the most out of the tablet and I do not want to go any further because of the stability.
Make a full backup in CWM before flashing the kernel!
The original kernel is from this ROM: kasty-pipo-m6_3G-422-20130814-rooted4b.zip
Here is the Thread to the ROM: http://www.arctablet.com/blog/forum/pipo-max-m6/pipo-m6-3g-model-rooted-android-4-2-2-custom-firmware-release-20130814/
Download Version 3: Download kernel_cpu1704_gpu660_ddr720_v3.zip
EDIT: A new working version added.
EDIT2: Final version based on kernel from Kasty Rom added (v3)
EDIT3: Added Version 4 with adjusted scaling (CPU Spy shows smoother usage of each step, slightly higher score in Antutu with 18775)
The steppings in this kernel are:
CPU (in MHz): 312, 504, 816, 1008, 1200, 1416, 1704
GPU (in MHz): 133, 200, 266, 400, 600, 660
RAM (in MHz): 720
Download Version 4: Download kernel_cpu1704_gpu660_ddr720_v4.zip
Easy Installation through ArcTools is possible now. See:
The following users say thank you to Balrog for this useful post:admin
Great stuff Balrog
Just wondering if there are users interested in flashing that overclocked firmware thru an ArcTools package ? (it's would work pretty much like the CWM Recovery install package). Just let me know.
Oh, I think it would be much easier if the flashing of the kernel is possible through ArcTools.
I got problems with flashing the kernel through the "ROM Flash Tool 1.37" (used by the RileyROM) so I had to pack again every time at my tests the kernel into the whole ROM and flash it via RKBatchTool 1.7.
Balrog, if you feel like re-installing a stock kernel for a test, you could give a try at the overclocked kernel ArcTools package on your M6. Just let me know if you are interested
I've enabled to the package, it's currently only visible to you (filtering is done on your current IP address).
It works about the same as our ArcTools package for CWM, the actual package name is "Pipo M6 overclocked kernel cpu1704_gpu660_ddr720". A good test would be to first reinstall a stock kernel, check with CPU Master that it is limited to stock value (1.6 GHz max) then install the package thru ArcTools, then reboot. Then check again that the kernel has been updated to the 1.7 GHz overclocked one.
Okay. I start the test as soon as I copied my external sd-card to my laptop (just to be sure ).
EDIT: I use the kasty-pipo-m6_3G-422-20130814-rooted4b.zip as stock ROM.
EDIT2: Stock Rom flashed and Antutu CPU Master shows 312-1608 MHz for CPU. Going to download the OCed Kernel now...
EDIT3: Ah, it does not run, just a black screen after the reboot!
But I got a hint where it comes from... I used the tool "imgRePackerRK" to unpack the rom. The unpacked kernel.img is the base for the mod. For some reason I don't know the kernel.img is not directly flashable. It has to be packed again to a whole Rom with imgRePackerRK. The resulting whole Rom is flashable via RKBatchTool 1.7.
There must be something little different (maybe a Header?) that is missing in the kernel.img...
I flash now the stock Rom and change the first post till the problem is solved.
First post updated till the problem is solved.
I compared binary the unpacked stock kernel from imgRePackerRK with the original kernel from RileyROM 1.8a: They are different!
I make a new version and use the stock Kernel from RileyROM 1.8a as a base. Wait a few minutes...
First post updated with a working version!
I don't know why the tool "imgRePackerRK" gives unusable results from unpacking a ROM. It can unpack and repack a ROM correctly but the unpacked kernel.img is not directly flashable. It has to be repacked to Rom again to use it. Is there a way to unpack correctly a Rom so that the resulting .img-files a directly usable without repacking? There must be my mistake at the first attemp.
This time I used the kernel from RileyROM 1.8a as a base. The result is directly flashable via "Rom Flash Tool 1.37". (and only the kernel this time...)
The only thing to mentioned is that at boot there is a few seconds the logo from Riley before the arctablet logo is shown. But I think this is no problem.
Edit: @Admin: We can start another test to flash the kernel via ArcTools if you want.
Balrog, the kernel I included in ArcTools is the one you have attached, it looks properly built but I can't test it as I don't have a PiPO M6 Max. If it's fine flashing with RK_Android_Tool_v1.35.zip it should work with the ArcTools package as well. Please try again if possible and let me know.
I made a new version based on Kasty Rom. This time I unpacked the whole Rom under Linux with freshly compiled tools. The result is very good, the unpacked kernel.img looks much different to the first attemp made with imgRePackerRK! Every day I learn a little bit more...
The kernel flashes directly with the linked RK_Android_Tool_v1.35.zip (zip-file must be unpacked with 7-zip ).
So please: Delete the old versions. The V3 is the correct one which runs. If you want I make a final test with V3 via ArcTools.
Thanks for your tests.
Your V3 kernel is now available in ArcTools package list, I let you check.
Okay. Test starts with flashing stock Kasty Rom: kasty-pipo-m6_3G-422-20130814-rooted4b.zip
Works like a charm!
2. Antutu CPU Master shows 1608 MHz as max. CPU frequenzy
3. Download & Install "Rockchip generic CWM recovery"with ArcTools
4. Download & Install "Pipo M6 overclocked kernel (v3)" with ArcTools
6. Antutu CPU Master shows 1704 MHz as max. CPU frequenzy
Now the kernel is ready to use.
Good news, thanks Balrog
I'll wait a bit for your feedback on the stability and battery life with that overclock kernel before making it available to everbody in ArcTools. If anyone else wants to help with testing, please post in this topic and I'll add you in ArcTools access list so you can use the package.
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