DISCLAIMER: As per all custom kernel disclaimers, while I do test this kernel on my own device, I'm not responsible for you voiding your warranty, or any damage/bricking/weirdness that may occur to your Padfone. If you're not comfortable with this, do not proceed.
Latest version can be found at:
v0.6 available as of 2013/06/05.
Based on ASUS source code v10.4.15.1, compatible with Android 4.1.1 stock PadFone2 firmwares
Lowest CPU frequency set to 192mhz
CPU frequency locked to 192mhz-1512mhz during boot
Undervolted to save power & reduce heat
Undervolt interface (compatible with System Tuner, Kernel Tuner, etc)
Additional CPU Governors: Wheatley, InteractiveX v2
Set InteractiveX v2 CPU Governor to default instead of Performance, to lower battery consumption, maintain snappy performance, and improve CPU freq config
GPU normal freq set to 128mhz to lower battery usage (will still scale upto 487mhz when busy)
Simple IO Scheduler (SIO) added, and set as default
Increased min/max read-ahead values from 16/128 to 32/1024
USB FastCharge (enable using Kernel Tuner, sysfs, etc)
OC version: Overclocking upto 1.72ghz for a bit faster performance
OC version: GPU overclock to 487mhz
Currently two versions:
"Quad" = 4 max CPUs (as per stock, but my tests indicate that the "Dual" version will provide better performance and stability)
"Low voltage" - Tweaked voltages that are stable on my PF2. You may need to raise/lower slightly to achieve the best result on your phone.
"OC" = CPU OC to 1.72ghz, GPU OC to 487mhz. Lower CPU voltages.
"STD" = No OC. Only slightly lower CPU voltages than stock.
Replace Wifi modules with AOSP versions (needed due to the way the stock modules were compiled by ASUS)
Disabled "Compile the kernel with debug info"
Disabled Debug memory initialisation
Disabled Magic SysRq key
NTFS in kernel (instead of module)
Disabled "Use MSM_DCVS for CPU/GPU frequency control"
Stock kernel 10.4.12.24: https://docs.google....dit?usp=sharing
Stock kernel 10.4.15.1: https://docs.google....dit?usp=sharing
Stone kernel v0.3 "OC": https://docs.google....dit?usp=sharing
Stone kernel v0.3 "STD": https://docs.google....dit?usp=sharing
1. Copy StoneK_A68_v0.3_OC.zip or StoneK_A68_v0.3_STD.zip to /sdcard/ via USB.
2. Copy StockKern_A68_10.4.15.1.zip to /sdcard/ via USB, in case you have trouble booting, and need to uninstall.
3. Boot into TWRP or CWM Recovery.
4. Perform backup of at least your "Boot" partition.
5. Install zip from step 1.
1. Copy StockKern_A68_10.4.15.1.zip to /sdcard/ via USB.
2. Boot into TWRP or CWM Recovery.
3. Install zip from step 1.
Edited by lflint, 05 June 2013 - 01:49 AM.