Presenting the Stone Kernel for Padfone 2, a custom kernel designed to get a little more out of the phone.
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.
v0.3 Main features: 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) Disabled "Monitor thermal state and limit CPU Frequency" 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) Disabled Android Logger to reduce IO</end> and improve performance (temporarily reverted) OC version: Overclocking upto 1.72ghz for a bit faster performance OC version: GPU overclock to 487mhz
Currently two versions: "Dual" = 2 max CPUs (reduced from 4 to save power, and improve overclocking stability) "Quad" = 4 max CPUs (as per stock, but my tests indicate that the "Dual" version will provide better performance and stability) "Standard voltage" - Only slightly lowered voltage, for those wanting a only-slightly-lowered voltage, close to stock. Usually more stable. "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.
Minor tweaks: Replace Wifi modules with AOSP versions (needed due to the way the stock modules were compiled by ASUS) Disabled swap Disabled "Compile the kernel with debug info" Disabled Debug memory initialisation Disabled Magic SysRq key NTFS in kernel (instead of module) FAT support Disabled "Use MSM_DCVS for CPU/GPU frequency control"
Installation: 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. 6. Reboot.
Uninstallation: 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. 4. Reboot.