Kernel for Sense-based Jelly Bean ROMs
FAST • STABLE • FULL-FEATURED
* Standard disclaimer: * Your warranty is now void. Use at your own risk. * In other words: It is your choice to use this software, * I am not responsible for any damage or problems you may have!
Sense 5.5 Android 4.4 or Android 4.4.2
NOTE: I don't have a Sprint One, please refer to the thread for any necessary workarounds on various ROMs.
Google Play Edition Android 4.4.2
As always, with overclocking, not all phones can handle all frequencies. If it doesn't boot, or randomly reboots, or freezes, your first course of action should be to reinstall with a lower frequency.
1. Install zip from recovery
2. Follow the instructions, if you don't know what to do, use the preselected option
4. Let it boot up all the way, and reboot again
Don't use dumlock, just flash as normal in recovery.
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@tbalden l2m and bln
@xHausx and @amarullz for installer stuff
@backfromthestorm for fstrim
@crpalmer for kernel based thermal control
@-TheEdge- for help building on Android 4.4+
ElementalX Configuration File
Your choices in the Aroma installer are used to build a configuration file. The config file is located at /etc/elementalx.conf. You can edit this file to change kernel settings. Whatever is set in this file will take effect when the device is booted (unless other scripts or apps interfere!)
The settings can be changed by editing /etc/elementalx.conf and rebooting. Advanced users can apply settings on the fly by running /etc/init.d/99elementalx as root.
There is no need to edit /etc/init.d/99elementalx. All settings are configured in /etc/elementalx.conf.
If settings are not sticking, make sure the file permissions for /etc/init.d/99elementalx are set to execute. Every time the settings are applied, a log file is created at /data/local/tmp/elementalx-kernel.log. Problems can be diagnosed by looking at the log file.
Please check to see if any /etc/init.d scripts or apps (such as Kernel Tuner or Trickstermod) are interfering with your settings.
ElementalX Log File
Every boot, a log file is created at /data/local/tmp/elementalx-kernel.log. This file shows the date and time and all settings that have been applied. Use this to verify and troubleshoot configuration options.
You don't need Kernel Tuner because the ElementalX installer sets everything up automatically, but if you want to check or change settings, Kernel Tuner is a nice app. Just be aware that Kernel Tuner is set by default to apply settings on boot, which can interfere with the settings you chose in the ElementalX installer.
Overclocking (or underclocking) is optional. The installer lets you choose a maximum between 1134MHz (underclocked) and 2160MHz (overclocked). You can set the maximum frequency individually for each CPU core in the installer. Whatever frequencies you chose in the installer will be set at boot for each CPU. Not all devices can handle overclocking. The stock maximum CPU frequency is 1.7GHz. I recommend a mild overclock, like 1836MHz. Clocking higher creates heat and wastes battery for very little performance gain.
The installer allows you to choose from several undervolting options. These automatically undervolt the lowest frequency (384MHz) where the CPU spends most of its time. The voltages for other frequencies are assigned based on the PVS bin of your phone. CPU voltages are fully customisable with apps such Kernel Tuner or Trickster Mod, but I recommend leaving these other voltages as-is unless you are prepared to do a lot of testing. Be careful, lowering voltages can cause instability. Generally, having reboots while the phone is asleep is a sign that your minimum voltage is too low. The minimum voltage allowed is 700mV.
Minimum CPU frequency
The minimum CPU frequency in this kernel is 384MHz. This chip was not designed to operate below 384MHz and I am respecting Qualcomm's design decision to have the CPU idle on pll8 at 384MHz. There is a way to achieve lower frequencies using the high frequency pll, however, this is likely to cause instability and inefficient operation (battery drain, ui stuttering)
You can choose to a GPU frequency of 400MHz (stock) or 450 MHz (overclocked). Overclocked offers better performance and will not have a significant impact on battery life. The same voltages are used no matter if the GPU is overclocked or not. Other phones using this chipset (e.g, the S4) set the GPU to 450MHz by default.
I've added kernel based thermal control and throttling. HTC's thermald is very aggressive and throttles the CPU frequency pretty much anytime you use all four processors. This kernel based implementation allow better performance while still protecting your phone from overheating. There are three levels of thermal control, which can be chosen in the installer or changed in /etc/elementalx.conf. The default option is recommended. With the run cool option, your CPU will run about 5C cooler than default while under heavy load. With the run hot option, the CPU will run about 5C warmer than default under heavy load.
The default governor is ondemand. I have not done extensive testing of governors so the stock governor is recommended for now. Intellidemand, lagfree, lionheart and smartassv2 are also available. Feedback on their operation is welcomed.
The default i/o scheduler is cfq. I have not tested the others much so the default is recommended for now. Other available schedulers are ROW, FIOPS, SIO, NOOP and deadline. Feedback on their operation is welcomed.
Installing a new ROM
If you install a new ROM, it will probably replace this with the stock kernel and will definitely overwrite /etc/init.d/99elementalx and /etc/elementalx.conf so you will lose your settings and certain features. So always reinstall the kernel after installing a ROM.
Sweep2wake (S2W) allows you to wake up your device by swiping your finger across the capacitive buttons from left to right. Swiping from right to left will put it back to sleep (sweep2sleep). The options are: sweep2wake/sweep2sleep, sweep2sleep only, and disabled. If you use apps such as Kernel Tuner, the sweep2sleep only option can be selected by choosing "On with backlight". You can edit /etc/elementalx.conf to change the setting on boot.
1=enable sweep2wake + sweep2sleep
2=enable sweep2sleep only
DoubleTap2Wake (DT2W) allows you to wake the device by double tapping in the bottom inch or so of the screen, above the capacitive buttons. You can edit /etc/elementalx.conf to change the setting on boot.
Logo2Wake (L2W) allows you to sleep or wake the device by long pressing the HTC logo. You have to press just slightly above the HTC logo. The screen will automatically turn on or off with a long press. You can edit /etc/elementalx.conf to change the setting on boot.
Pocket detection protects against accidental wakes while S2W, DT2W or L2W are enabled and the phone is in your pocket. Pocket detection uses the proximity sensor. A few people have a problem with their proximity sensor that makes DT2W not work, so I've made an option to disable pocket detection. You can edit /etc/elementalx.conf to change the setting on boot.
1=enable pocket detection
Enabling Logot2Menu (L2M) allows you to use the HTC logo as a menu button. You must press just slightly above the HTC logo. You can edit /etc/elementalx.conf to change the setting on boot.
Button Light Notification
With Button Light Notification (BLN), the capacitive buttons will blink on and off when you have a new notification. As soon as the screen comes on, BLN is canceled and the lights will no longer blink until you have another notification. Please note that if you have your screen set to turn on when a message arrives, you will not see the buttons blinking because once the screen comes on, the button light notification is canceled. You can edit /etc/elementalx.conf to change the setting on boot.
0 = disabled
1 = BLN enabled
This is for anyone who wants to use OTG to connect a USB stick or portable harddrive formatted with Microsoft's NTFS filesystem. You will need Stickmount or a similar app, HTC Sense does not automatically detect NTFS filesystem.
All the cryptographic modules load properly, so you shouldn't have an issues with paid apps.
This kernel supports many game pads and controllers, including PS3 controllers and some X-Box controllers. It has full OTG support. A refresh rate of 60Hz for HDMI output allows you to play games on the big screen without choppiness. CIFS support is built into the kernel. Faux sound control is also supported.