[Galaxy S II General] Saber:
Stweaks Basics

Note: This is the i9100 version of dorimanx stweaks. I will not make a guide for the newer dorimanx stweaks app since I don't have the LG G2! However, if someone can provide screenshots, I'm sure I can do something about it!

CPU

Boot CPU frequency:

The CPU frequency that your phone will run at while booting or at startup. Increase this for faster boot speed, decrease for better battery life and stability.

My Recommendation: Leave it to defaults

Boost CPU frequency:

The CPU frequency that your phone will run whenever there is a sharp increase in CPU load. Increase this for faster responsiveness, decrease for better battery life. Please note that you can't set this value higher than the max cpu frequency. It's COMMON-SENSE!

My Recommendation: Leave it to defaults

Max Normal Frequency:

The CPU frequency that your phone will run before going to max frequency. This won't do much to your phone's CPU frequency, so it's best to leave it to defaults unless underclocking.

My Recommendation: Leave it to defaults

Max OC Frequency:

The overall max CPU frequency your phone will run at. Increase this for better responsiveness and processing speed, decrease if you want better battery life.

My Recommendation: Leave it to defaults unless you want to overclock or underclock

Min Frequency:

The minimum CPU frequency your phone will run at. Increase this for better responsiveness and processing speed, decrease if you want better battery life.

My Recommendation: Leave it to defaults unless you want to overclock or underclock

CPU-VOLTAGE

This section of Stweaks allow you to undervolt and overvolt your CPU. Please note that undervolting (UV) your CPU will decrease phone stability if set too low, whereas overvolting (OV) will decrease your CPU's lifespan and generate more heat.

CPU Voltage main switch:

Ticking this enables set CPU voltages. If your phone reboots from instability, stweaks will most likely be resetted to protect your phone from any further problems.

Check CPU Voltage Group:

Using this button checks what CPU voltage group your CPU is using. The Galaxy S2 has 5 different CPU types around the world, the most common is number 3 and the most stable is number 4 and 5. Number 2 and 1 are old CPU types and need more voltage to be stable. If your CPU type is 1 or 2, don't UV much otherwise you'll get SODs. Remember that the higher the number, the more undervolt you can apply on your CPU. If you are downloading someone else's profile and they have a different CPU voltage type, try to avoid using it. Higher voltage require higher voltages to be stable, but at the cost of heat and battery life. Please be careful if you are considering to overclock your CPU!

If you want to undervolt, here are some safe voltages you can set (see link below), just set the sliders to the same voltages for the corresponding frequencies:

https://docs.google.com/spreadsheets/d/1MlV6Tbfo_7_QEUnTkfpdioSSPSDSWPJLRxL8Z00A8yA/edit?usp=sharing

CPU-TUNING (AWAKE)

Default CPU governor:

The default CPU governor when your phone is awake (screen is on). DorimanX kernel by default gives users an option to change to various governors such as HYPER, Ondemand and NeoX. Changing this will affect your phone's responsiveness and multitasking performance. For more information about governors, visit my guide: http://xdaforums.com/general/general/ref-to-date-guide-cpu-governors-o-t3048957

My Recommendation: The default governor (HYPER for the i9100) is responsive and stable for everyday usage, you can change it if your want.

Hotplug_Enable:

The hotplugging governor for your phone. You can choose from Alucard hotplug, Intellihotplug, enabled auto and disabled.

My Recommendation: Leave it to defaults. Enabled Auto setting will select the best hotplugging governor for your device.

Gov Policy Install:

This applies all the changes to the CPU governor settings and tunables. It is required by the user to press this if they want to keep the CPU settings.

Up Threshold:

Measured as percentage, when load on CPU is equal or above this threshold, your CPU will scale up.

Lower value = early scale up, and vice versa. (Applies only to HYPER, Ondemand, Intellidemand, PegasusQ, Conservative, Sleepy and zzmanX)

Default value = 60%

My Recommendation: Change it to 70% for better balance between battery life while keeping good performance.

Up Threshold at min freq sleep:

This threshold is used as up threshold while sampling rate is at frequencies less than freq_for_responsiveness. Above that, normal up_threshold is used.

Lower value = early scale up, and vice versa. (Applies only to HYPER, Ondemand, PegasusQ)

Default value = 50%

My Recommendation: Leave to defaults

Sampling rate sleep:

This factor determines how often the governor should poll for CPU usage in terms of frequency and load percentage to make scaling decisions.

Lower value = early scale up, and vice versa. (Applies only to HYPER, Ondemand, Intellidemand, PegasusQ, Conservative, Nightmare, Darkness Sleepy and zzmanX)

Default value = 60000uS

My Recommendation: Leave to defaults

Freq for responsiveness sleep

Long story short, this is setting is the frequency before the CPU goes to lower frequencies. It prevents any lag spikes from happening.

Lower value = More battery life, but more lags! (Applies only to HYPER, PegasusQ and Nightmare)

Default value = 400000kHz

My Recommendation: Leave to defaults

Down threshold sleep:

This is the same as the up_threshold but for the opposite direction.

Lower value = Frequencies reduced faster, and vise versa. (Applies only to HYPER, Ondemand, Intellidemand, PegasusQ, Conservative, Nightmare, Darkness Sleepy and zzmanX)

Default value = 30%

My Recommendation: Leave to defaults

CPU-TUNING (SLEEP)

Settings are pretty much the same as the awake CPU governor settings, but there are slight changes to the CPU governor tunables (more info on that later).

Deep-Sleep CPU governor:

The default CPU governor when your phone is in deep sleep or standby (screen is off). DorimanX kernel by default gives users an option to change to various governors such as HYPER, Ondemand and NeoX. Changing this will affect battery life and stability. For more information about governors, visit my guide: http://xdaforums.com/general/general/ref-to-date-guide-cpu-governors-o-t3048957

My Recommendation: The default governor (Ondemand for the i9100) is responsive and stable for everyday usage, you can change it if your want.

IO

Kilobytes To Read-Ahead:

This only applies to the external sd card. This setting determines the kilobytes to read-ahead for your external sd card. Changing this will affect the transfer speeds to your phone's external sd card.

My Recommendation: Leave it to defaults. Auto setting will select the best setting for your device.

Default Awake IO scheduler:

This will set the default IO scheduler when your phone is awake (screen-on). There are many IO schedulers included with dorimanX kernels such as SIO, ZEN, BFQ and CFQ. Changing this will affect transfer speeds, phone responsiveness and load times. For more information about IO schedulers, visit my guide here: http://xdaforums.com/general/general/ref-to-date-guide-cpu-governors-o-t3048957

My Recommendation: You can leave it to the default IO scheduler. I'm sure that the scheduler dorimanX chooses is stable, so if you don't know much about IO schedulers, leave it to defaults. However, I do recommend changing it to a simpler scheduler such as SIO and ZEN which have low overheads and less IO lantency.

Standby and Deepsleep IO scheduler:

The default IO scheduler when your phone is on standby or in deepsleep (screen off).

My Recommendation: Keep it the same as the awake IO scheduler. You can make it different from the awake scheduler if you really want to (but I don't recommend this).

Memory

AUTO OOM

Stands for Automatic low memory management, this allows the low memory management settings to be applied automatically or to take effect on your phone.

Default: Ticked

My Recommendation: Keep it ticked.

OOM Level Screen ON

The setting for the level of low memory management when screen is on. More aggressive settings leads to more free RAM but more killed apps.

Default: Aggressive

My Recommendation: Change it to medium as I believe it's the sweet spot for our phone.

OOM Level Screen OFF

The setting for the level of low memory management when screen is off. Same scenario applies where more aggressive settings leads to more free RAM but more killed apps.

Default: Medium

My Recommendation: Leave to defaults.

GPU

VPLL MODE

Ticking this box allows users to overclock the gpu even further than the default allowed frequencies. Please note that higher frequencies need more voltage, but there is the risk of damaging your GPU if too excessive.

Default: Unticked

My Recommendation: Keep this unticked. This settings is for the advanced overclockers and and tweakaholics. It is too risky keeping this enabled

GPU utilization timeout

This settings changes the CPU utilization timeout calculation. Basically this tunes the ramp up aggresiveness for the GPU, much like the CPU thresholds. Smaller values give faster GPU response but more battery drainage and vice versa.

Default: 400MSec

My Recommendation: Keep to default value.

GPU frequency steps

Dorimanx Kernel includes 5 GPU steps. These steps allow the GPU to scale frequencies efficiently and is originally made to save battery when not busy.

My Recommendation: Keep to default values unless you want to overclock.

GPU voltage steps

Complementing the frequencies, these settings are the GPU voltages for each step. Much like CPU voltages, settings these values too high will result in damage to the GPU, while not having enough voltage will result in instability.

My Recommendation: Keep to default values unless you want to overclock.

Screen

Min BL

Stands for minimum brightness level. Higher value will result in staying in the lowest brightness level for brighter conditions.

Default: 30

My Recommendation: Keep to default values.

Min Gamma

The setting to adjust minimum brightness level.

Default: 1

My Recommendation: Keep to default values.

Max Gamma

The setting to adjust minimum brightness level.

Default: 23

My Recommendation: Keep to default values.

Other settings will be explained in advanced guide!

Sound

Headphone Amplifier:

This setting allows you to adjust the headphone amplification level. Increase this if you want your headphones to sound louder.

My Recommendation: Keep to Disabled or Reset unless you want to boost headphone volume. I don't really recommend increasing this value.

Volume levels and Gain Controls:

These settings should be pretty straightforward, they're clearly labeled. Increase these values to boost the recording/playback volumes.

My Recommendation: Keep values to 0dB unless you want to boost headphone volume. I don't personally increase these values.

BLN

BLN stands for Backlight notification, meaning that your phone's buttons will light up whenever your phone gets a notification.

BLN

Tick it to enable Backlight notification. Please note that BLN will increase your phone's battery drainage when enabled.

My Recommendation: I don't personally enable BLN. Enable it if you want to.

BLN effect

This setting will set LED behavior for BLN, if BLNWW (BLN without wakelock, without getting CPU out of deep sleep) is on, the effect can only be steady. Options include steady, breathing and blinking.

My Recommendation: I don't personally enable BLN. Enable it if you want to.

Notification Timeout

This setting determines how long the Backlight Notification will stay on for. Time ranges from never to 2 hours.

My Recommendation: I don't personally enable BLN. But keeping it to a shorter value will save you battery.

Force LEDS disabled

The title says it all, forces your touch LEDs off if enabled.

My Recommendation: I don't personally enable BLN. Change the settings if you need this function

LED Timeout

This setting determines how long your phone's touch LEDs will light up when touched or when using touch screen.

Default value = 3 sec

My Recommendation: I don't personally enable BLN. Change the settings if you need this function

BLNWW

BLN Without Wakelock. This is a more battery efficient BLN but has less features than normal BLN. Enabling this (while BLN is also enabled) will let the CPU continue to sleep during BLN and save battery.

Default value = Ticked

My Recommendation: I don't personally enable BLN. Tick the setting if you need this function

The rest of the BLN settings should be pretty straightforward :)

Other

DorimanX has included scripts in his kernel that can optimize the phone by during certain conditions(time) or they can be applied straight away. The settings should be well explained anyway or straightforward.

Cron task main switch

Enable this to enable all set tasks. You need to enable this otherwise the set tasks will not be done!

My Recommendation: I don't personally enable Cron. Tick the setting if you need this function

Cron task main switch

Press this to test if the Cron task service is online or not. If the service is offline and you've enabled cron, the your ROM needs to be updated. (Busybox out of date)

Cron reset

Press this button to reset the scripts and jobs from kernel and to refresh the configuration. This will clear all your custom changes.

Tweaks

Cortexbrain is a script created by DorimanX that can manipulate many kernel settings based on chosen Stweaks profiles and settings and on screen state. It is so useful that the kernel enables it as default.

Cortexbrain-Background-Process

Enables or Disables the Cortexbrain background process.

Default: Enabled

My Recommendation: Leave it to enabled!

Check Background-Process

Checkes whether the Cortexbrain background process is running or not.

Android logger control

Controls what you can see in android logcat.

Default: AUTO

My Recommendation: Leave it to AUTO!

Modules will covered in advanced guide

Profiles

Here is the menu you want to manage all of the custom profiles available on stweaks

Profile Check:

Checks what profile you are currently running. By default, dorimanX kernel uses the default profile, and all changes will be saved there.

Profiles:

Include:

- Extreme battery

- Battery

- Default (Default)

- Performance

- Extreme Performance

I don't recommend uses the other profiles since they are outdated or can be further optimized.

Backup or Restore

This section allows users to backup and restore the settings in stweaks. It will take approximately 30secs for stweaks to restore user settings. The app will restart and the values should all be restored.

Settings Backup

Press this button to backup your stweaks settings. The settings will be saved in the internal sd card on your phone and will be called default.profile.backup. You can open this file in notepad or wordpad to edit settings externally

Settings Restore

Press this button to restore your stweaks settings. Read the description of the section about how long to wait and app behavior.

Dualboot

This section allow you to reboot your phone in several ways. DorimanX kernel supports dualbooting, and you can boot into 2 different roms during the boot process or via app. In order to boot into 2nd rom, the 2nd rom needs to be installed first. To install second rom, go into recovery and dualboot settings. The buttongs should be straightforward here :)

Bug-Report

Allows users to report any stweak/kernel specific bugs. Pressing this button will create a log file on your internal sd card which can be used to diagnose any kernel problems.

Partitition Status

Use this button to check your phone's partitions for errors (data, system, cache, efs and preload). This will NOT fix any errors, it will just check. To fix, backup your files with a backup app or making a nandroid backup (backup via recovery), then press the data and cache fix button located in the OTHER tab. USE IT AT YOUR OWN RISK SOME DATA MAY BE LOST DURING THE FIXING PROCESS! If there's any broken apps, reinstall them. If you get bootloop, reinstall rom. If you are stuck on boot, wipe phone than install rom. If it says your partitions are CLEAN, your partitions should have no errors. Usually if your partitions has errors, the stock browser will pop up saying that your partitions need to be fixed.

Kernel-Update

Allows to check of updates. Again this feature doesn't work properly anymore. And so ignore the message saying that there is a newer version of the kernel!

Extras

Gives info about your phone. That's about it!

For now, I will be taking a break. Wait to tomorrow for more info! ;)