[KERNEL] [ROOT] [SM-N920* Exynos 7420] [19 Feb] SkyHigh TW 5.1.1 Kernel [v4.5]

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1stichiban

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Jan 18, 2012
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UpInTheAir

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Jan 17, 2011
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Thanks.

This is what I've got on MM and I can't kill it. Crontab is enabled by default for what service I don't know. Certainly not SkyHigh (as I've removed it). I'll read up and Google tomorrow.
 

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Pinedat

Senior Member
Nov 3, 2013
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Dear UpInTheAir,
Could you add the version for N920CD with Android logger Enabled by default, please? Because many Call recording apps use it to detect a moment when the other side answers.
Thanks in advance.
 

aldoblaga

Senior Member
Dec 19, 2009
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Cluj Napoca
Yes, I know that. But if it possible, it would be great to have such a version. For example, I use the kernel as it is without any tuning. So I don't wanna install Synapse to spend RAM...
please... =)

Jesus christ man...really? Do u by any chance have a note 5 with just 512 mb of ram or were you just joking? How is 4gb of ram not enough for you?
 

UpInTheAir

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Jan 17, 2011
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Phuket, Thailand
Yes, I know that. But if it possible, it would be great to have such a version. For example, I use the kernel as it is without any tuning. So I don't wanna install Synapse to spend RAM...
please... =)

By the content of your post, you never gave any indication of what you actually know and don't. The answer is no.

And BTW MM is out and all 5.1.1 development is discontinued. This thread will remain open until MM is released for some other variant I "might" consider supporting. I guarantee nothing though.


Jesus christ man...really? Do u by any chance have a note 5 with just 512 mb of ram or were you just joking? How is 4gb of ram not enough for you?

MM kernel has much better RAM management, so watch out for those LL "tweaks" screwing things up. A lot of VM and LMK values have changed and those still continuing to put those in MM ROMs / kernels are not improving anything.
 

muffinsmuffy

Senior Member
Jan 7, 2015
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By the content of your post, you never gave any indication of what you actually know and don't. The answer is no.

And BTW MM is out and all 5.1.1 development is discontinued. This thread will remain open until MM is released for some other variant I "might" consider supporting. I guarantee nothing though.




MM kernel has much better RAM management, so watch out for those LL "tweaks" screwing things up. A lot of VM and LMK values have changed and those still continuing to put those in MM ROMs / kernels are not improving anything.
I noticed a difference with mm memory management seems to handle multitasking much better

Sent from my SM-N920C using Tapatalk
 

Rx8Driver

Senior Member
Jan 12, 2014
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My City
OnePlus 7T Pro McLaren
Not for n920t but n920c is out official firmware Cambodian though

Sent from my SM-N920C using Tapatalk

Cambodia, Korea, and Iraq so far...

---------- Post added at 11:20 PM ---------- Previous post was at 11:19 PM ----------

Did u guys say mm is out for.note 5 920t variant on the 11th of march? Cause i can t wait!!! So excited and so looking forward to the release!!!

I'm very much anticipating the t variant release! I said they wouldn't release mm for existing tmo devices until after release day for the s7's....

So I'll wait for it instead of dealing with the call audio issues that have been around on ported mm from other variants- i feel like i read where uita solved some audio issue but i don't think it was the same thing? I haven't been following closely enough smh
 

muffinsmuffy

Senior Member
Jan 7, 2015
1,008
891
Cambodia, Korea, and Iraq so far...

---------- Post added at 11:20 PM ---------- Previous post was at 11:19 PM ----------



I'm very much anticipating the t variant release! I said they wouldn't release mm for existing tmo devices until after release day for the s7's....

So I'll wait for it instead of dealing with the call audio issues that have been around on ported mm from other variants- i feel like i read where uita solved some audio issue but i don't think it was the same thing? I haven't been following closely enough smh
I always thought you guys would get it first

Sent from my SM-N920C using Tapatalk
 

muffinsmuffy

Senior Member
Jan 7, 2015
1,008
891
I never did. N920T is restricted "carrier" model, instead of the widely available N920C "international" model. Makes sense, but not always though. .
It was because of the leaked firmware thats why i thought n920t would get it i mean they had the firmware by now they should have tested and fine tuned everything

Sent from my SM-N920C using Tapatalk
 

UpInTheAir

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Jan 17, 2011
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It was because of the leaked firmware thats why i thought n920t would get it i mean they had the firmware by now they should have tested and fine tuned everything

Sent from my SM-N920C using Tapatalk

Just because the firmware was leaked doesn't mean that other variants weren't at a similar or advanced stage of development. The N920T has to go through the carpet carrier before release where many other variant do not. Same for G928C being 6.0.1 released.

Anyway, you should get yourself SkyHigh MM v2.2 ;)
 
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    [KERNEL] [ROOT] [SM-N920* Exynos 7420] [19 February] SkyHigh TW 5.1.1 Kernel [ v4.5 ] [Synapse ++]

    *** DEVELOPMENT & SUPPORT CEASED FOR 5.1.1 ***

    WARNING

    Code:
    [COLOR="Red"]PLEASE SHOW RESPECT TO ACTUALLY [COLOR="PURPLE"][B]READ POSTS #1-3[/B][/COLOR]
    [URL="http://forum.xda-developers.com/announcement.php?a=81"][B]XDA RULE #1 "SEARCH BEFORE POSTING"[/B][/URL] (GOOGLE, XDA & THREAD), 
    IF YOU DON'T LIKE A UP-FRONT "MATTER OF FACT" APPROACH,
    [B]THEN DON'T BOTHER POSTING[/B]. [/COLOR]


    FEATURES

    Code:
    * Based on official Samsung source: [URL="http://opensource.samsung.com/reception/receptionSub.do?method=sub&sub=F&searchValue=n920"]Samsung OSRC[/URL]
    * ramdisk source:
    [INDENT][COLOR="red"]N920C/CD/I/G[/COLOR] XXU2APA2
    [COLOR="red"]N9200[/COLOR] ZCU2AOL2
    [COLOR="red"]N9208[/COLOR] XXU2AOL1[/INDENT]
    * Compiled with Linaro gcc-linaro-4.9-2015.02-3-x86_64_aarch64-linux-gnu
    * Linux 3.10.96
    * [COLOR="red"]AUTO-ROOT binary v2.52[/COLOR] & Install busybox v1.24.1-Dorimanx
    * [COLOR="Red"]KNOX WARRANTY VOID: 1[/COLOR]
    * [COLOR="red"]SELinux PERMISSIVE[/COLOR]  (for Titanium Backup and other apps to work correctly)
    * adb insecure
    * stock dt.img
    * init.d script support (drop in script & set permissions to 755 or 777 and reboot)
    * [COLOR="red"]DEEP SLEEP FIX[/COLOR]
    * [COLOR="red"]IN-CALL REBOOT BUG "FIX"[/COLOR]
    * Possible Screen Mirroring / AllShare Cast fix
    * Secure storage = false (should prevent WIFI settings & passwords wiping on reboots)
    * RAM management tweaks
    * GearVR [U]reported[/U] working (depends on ROM/firmware version installed)
    * [B]Synapse app support[/B] for many kernel configurations + more !!
    * Many descriptions are in the app ! If you require more info, don't be lazy, please [B]SEARCH[/B] like I did ;)


    SYNAPSE FEATURES


    ABOUT

    • PayPal Donation link
    • SkyHigh kernel thread link
    • Up time
      Total
      Sleep
      Awake​


    A57 CPU

    • A57 big Cores Frequency Scaling
      live frequency
      MAX: 2400 MHz (stock 2100 MHz is default)
      MIN: 500 MHz (stock 800 MHz is default)​

    A57 VOLT

    • HPM voltage control
    • A57 big Cores voltage control

    A53 CPU

    • A53 LITTLE Cores Frequency Scaling
      live frequency
      MAX: 1600 MHz (stock 1500 MHz is default)
      MIN: 200 MHz (stock 400 MHz is default)​

    A53 VOLT

    • HPM voltage control
    • A53 LITTLE Cores voltage control

    CPU GOV

    • CPU governors
      interactive (default)
      on-demand
      conservative
      ktoonservative (hotplug)
      userspace
      performance​
    • Interactive governor live load at current frequency (A57+A53)
    • Interactive governor tuning (profiles)
      Default
      Battery
      Performance
      Turbo Mode​

    A57 GOV

    • A57 governor tunables

    A53 GOV

    • A53 CPU governor tunables

    MULTICORE

    • HMP threshold tuning profiles
      Default
      Performance
      Battery​
    • HMP threshold controls for up/down migration
    • Power Aware Scheduling control
    • HMP LITTLE Packing
    • PEWQ (Power-efficient Workqueues) control
    • Exynos Core Control Interface (choose 5 > 8 cores online)

    CPU STATS

    • CPU0 time in state
    • CPU4 time in state

    BOOST

    • Input-Booster profiles
      key
      touchkey​

    GPU

    • GPU stats
      Current clock freq
      Live Frequency Utilization (load)
      Time in state​
    • GPU power policy control
      coarse_demand (default)
      demand
      always_on​
    • GPU frequency scaling
      Max freq control to 852 MHz (700 MHz is default)
      Min freq control to 100 MHz (stock 266 MHz is default)​
    • GPU Governor
      Default
      Interactive (default)
      Static
      Booster (more graphic and benchmark performance)​
    • GPU Interactive Governor tunables
      highspeed clock
      highspeed load
      highspeed delay​

    GPU VOLT

    • HPM voltage control
    • GPU voltage control

    THERMAL

    • Sensor temperatures
      A57
      A53
      GPU
      ISP​
    • CPU thermal control
      normal temp
      critical temp​
    • GPU thermal control
      On/Off thermal manager
      temp levels 1 > 5
      throttling freq levels​
    • Memory thermal control
      normal temp
      critical temp​
    • ISP (Image Signal Processor) thermal control
      temp levels 1 > 5​

    BUS

    • Memory Bus HPM voltage control
    • Memory Bus voltage control
    • Internal Bus voltage control
    • ISP (Image Signal Processor) voltage control

    IO

    • I/O Schedulers

      BFQ (tweaked for SSD)
      DEADLINE (tweaked for SSD)
      FIOPS
      CFQ = default (tweaked for SSD)
      NOOP
      ROW (tweaked)​
    • Storage read-ahead (256 KB)
    • General IO tuneable
      Add random
      IO stats
      Rotational
      No merges
      RQ Affinity
      NR requests​
    • I/O scheduler tunables

    MEMORY

    • Memory state
      Total
      Free​
    • Low Memory Killer Profiles
      Low
      Medium
      Custom (recommend)
      Default (default)
      Aggressive
      Exterminate​
    • Low Memory Killer minfree tuning (OOM LMK)
    • Adaptive Low Memory Killer
      vmpressure_file_min​
    • Samsung SPCM Service control (Enabled = default/stock)
    • Ultra Kernel SamePage Merging (UKSM)
      UKSM stats
      Scan Delay Interval
      UKSM Governor
      Max CPU consumption​
    • Dynamic FSYNC control (enabled)
    • Dynamic dirty page writeback control (enabled)
      Dirty writeback active
      Dirty writeback suspend​
    • Virtual Memory
      Virtual NAND Swap control (VNSwap)
      ZSwap memory pool
      Adaptive Dirty Background Ratio on suspend / resume
      Adaptive Dirty Ratio on suspend / resume
      Drop caches (Clear VFS cache after boot)
      Laptop Mode
      Swapiness
      Adaptive vfs_cache_pressure on suspend / resume​

    ADVANCED

    • Entropy (max 4096)
    • Gentle Fair Sleepers control (disabled)
    • Arch Power control (enabled)
    • randomize_va_space control
    • pm_freeze_timeout control
    • Google Play Services Battery Drain Fix
    • Driver wakelock controls
      SensorHub
      ssp_sensorhub​
      SSP
      sig_motion_sensor
      pickup_gesture
      grip_sensor
      tilt_detector
      proximity_sensor​
      bcm4773
      bcm4773_gps​

    POWER SUSPEND

    • Modes:
      Autosleep
      Userspace
      Display Panel
      Hybrid (Autosleep + Display Panel) = default​
    • PowerSuspend State (enable only with Userspace mode set)
    • Version push button

    AUDIO

    (Sound Control by AndreiLux)

    • Jack media volume control
      L/R channel volume
      mono mixer​
    • Speaker volume control
      Earpiece volume​
    • Main Equalizer
    • Advanced Stereo Equalizer

    SCREEN

    • Live panel brightness
    • sweep2sleep control

    NETWORK

    • TCP congestion control
      All available enabled.
      Default = westwood+​
    • Screen mirror/allshare cast fix control (enabled)
    • Clean WIFI Lease
    • WIFI Passwords
      Save
      Restore​
    • WiFi Power Mode While Screen-On/Off
    Force Off
    Off
    Fast (default = screen ON)
    Max (default = screen OFF)
    WiFi DTIM Interval While Screen-On/Off​
    • RX wakelock timeout control
    • TCP/IP network security
    • 3G DNS speed & security tweak
      Google
      OpenDNS
      Comodo, Level3
      Norton_DNS
      Smart_Viper​
    • GPS time-zone
      Original
      Asia
      Europe
      Oceania
      North America
      South America
      Africa​
    • IPV6-protocol
      IPv6 Test push button
      IPv6 enable / disable
      optimistic detection​

    SECURITY

    • KNOX control
      NO_ACTION (default)
      Disabled
      Enabled​
    • SELinux
      Live status​

    BATTERY

    • Battery info
    • Charging controls
      HV power supplies
      A/C Mains
      A/C Mains (screen-on)
      Standard downstream port
      Dedicated charging port
      Charging downstream port
      Accessory charging adapter
      MHL power
      Wireless power​
    • Store Mode
      enable / disable (master control)
      Store Mode Maximum
      Store Mode Minimum​
    • Battery SCALING calibration (fuel gauge reset)

    LED

    • LED disable control
    • LED Fade-in/out Time Period
      LED Fade control
      Fade-in
      Fade-out​
    • Test notification push button
    • Stop notification push button

    FS (File System)

    • Display FS Type
    • FS Controls
      remount System r/w r/o
      remount RootFS r/w r/o​
    • Scrolling cache control
    • Optimise Databases (SQLite3)
    • FSTrim lagfix
    • Wipe options
      cache reboot
      dalvik-cache reboot
      cache & dalvik-cache reboot​
    • Clean up
      clipboard cache
      /data/tombstones
      /data/anr logs
      /data/dropbox logs
      lost+found​

    CORTEXBRAIN

    • Live status
    • Cortexbrain-Background-Process (Master Switch)
    • CortexBrain Functions
      WiFi Auto
      Media Manager
      System-Tweaks
      Kernel-Tweaks
      nmi_watchdog​

    CRONTAB

    • Live status
    • CronTask (Master Switch)
    • Cron Tasks
      Clean RAM cache (every hour)
      Google Service restart (every 3 hours)
      Clean app cache & junk (every day at 4:30AM UTC)
      clipboard cache
      /data/tombstones
      /data/anr logs
      /data/dropbox logs
      lost+found​
      Optimize databases (every day at 4:40AM UTC)
      File system trim (every day at 4:50AM UTC)
      Battery scaling calibration (every Sunday at 5:00AM UTC)​
    • Test Cron Task jobs

    USB

    • USB status
    • USB mode selection
      MTP
      PTP
      CD_ROM (drivedroid support)
      USB_Keyboard-Mouse​

    MODULES

    • CIFS
    • NTFS
    • ISO9660_FS
    • UDF
    • XPAD

    BACKUP & RESTORE

    • Name - Restore - Delete - Backup
      profiles
      kernel image​

    LOGS

    • Android Logger control (enabled)
      LogCat​
    • Kernel Logger control (enabled)
      dmesg
      last_kmsg​

    REBOOT

    • Reboot device
    • Recovery Mode
    • Download Mode
    • Power Off
    • Clear Synapse Data & Reboot
    • Restart Synapse

    INFO

    • Reduced logging
    • exFAT FS support
    • NTFS R/W support with app
    • CIFS support (not tested)
    • ISO 9660 CDROM & UDF FS support
    • Frandom
    • mount partitions NOATIME and NODIRATIME by default
    • FSTrim on boot (ensure consistent IO throughput)
    • Entropy tweaks
    • Increased boot frequency
    • Power-efficient workqueue (PEWQ) efficiency patches
    • CLEANCACHE & ZCACHE
    • Microsoft X-BOX gamepad controller module (updated)
    • LZO de/compression algorithm
    • Slub tweaked
    • Much more - check source commits & Synapse


    CREDITS

    • My family !!
    • @Chainfire - root & SuperSU / @Manh_IT - auto-root method
    • @AndreiLux - years of support for Exynos development and his various kernel features + Synapse app and UCI code
    • @halaszk88 - patches and Synapse code I adapted to many of my kernels
    • @dorimanx - BusyBox and various ramdisk tweaks/ideas
    • @apb_axel - I adapted and used many of the Synapse controls to suit my kernels
    • @arter97 - various source fixes/patches
    • @ktoonsez - ktoonservative hotplug governor
    • @LuigiBull23 - ktoonservative profiles I've adapted
    • XDA
    • Samsung OSRC
    • and many others!
    • check github source credits
    • IF I'VE FORGOTTEN ANYONE, PLEASE DON'T BE SHY AND SPEAK UP, THANKS

    XDA:DevDB Information
    SkyHigh Note 5 Exynos 7420 Kernel, Kernel for the Samsung Galaxy Note 5

    Contributors
    UpInTheAir
    Source Code: https://github.com/UpInTheAir/SM-N920

    Kernel Special Features: Synapse ++ | EXT4 | exFAT | NTFS | CIFS

    Version Information
    Status: Stable
    Current Stable Version: 4.5
    Stable Release Date: 2016-02-19

    Created 2015-08-29
    Last Updated 2016-03-04
    55
    Warning - ChangeLog - Requirements - Installation - Download - Source

    ** DISCLAIMER : FLASH AT YOUR OWN RISK **

    WARNING :


    Code:
    [COLOR="Red"]* Under-volting can cause instability
    
    * Over-clocking can cause freeze/reboot, heat & damage to CPU, GPU or other hardware
    
    * Any customizations may void warranty
    
    * May not be suitable for your device or customizations
    
    * UpInTheAir is NOT responsible, the person you see in the mirror is !![/COLOR]


    CHANGE-LOG

    1. Open GitHub Change-Logs
    2. Tap/click "Full Change log" under the latest version (i.e. v4.5)
    3. Example: ALL commits (changes) for v4.4 > v4.5 are visible at the top section
    4. Tap/click any commit and will display all comments in the top section and code changes in the bottom section for particular commit

    REQUIREMENTS

    1. Variant support for:
      SM-N920C / CD / G / I
      SM-N9200
      SM-N9208_SEA (SM-N9208_TW reported to work, but no official support)​
    2. Watch >>> THIS <<<
    3. FOR BUG REPORTING: Stock UNMODIFIED TouchWiz (TW) 5.1.1 ROM (this means no Xposed or tweaks etc)
    4. Custom recovery i.e.. TWRP

    INSTALLATION

    1. If you have systemless root installed, then you must REMOVE it as this kernel will auto-root a proven and stable 2.52 binary into system.
      Open SuperSU app
      Select "Full unroot" option
      Reboot (or flash kernel)
      Re-install SuperSU app
    2. Uninstall any CPU control apps, tweaks and init.d scripts etc.
    3. Recommend: Disable or remove KNOX (you can disable with Synapse once kernel is flashed)
    4. Install Synapse app from Google Play and rate it ☆☆☆☆☆ !!
    5. Device Settings:
      Enable Developer Options > OEM UNLOCK
      If flashing from any custom kernel with Synapse app > Device settings > Applications > Synapse > Force Stop > clear data​
    6. If not installed > Install SuperSU from Google Play:
    7. N9200/N9208: unlock your bootloader >> Install and run CROM service unlock app from Galaxy App Store (this will probably wipe your accounts). If you have problems with CROM, try without it !
    8. Boot into custom recovery and flash SkyHigh_kernel____.zip FOR YOUR DEVICE and reboot
    9. After boot:
      a) wait at least 120 secs to stabilize
      b) Open Synapse
      c) Tap "Understood"
      d) DO this step so some defaults are set !!
      1. tap the square menu button top right hand corner
      2. tap the three dots button
      3. "select all globally"
      4. tap the back button next to it
      5. apply​



    DOWNLOADS

    Mod Edit: Links Removed



    SOURCE

    ALL KERNELS COMPILED WITH SAME SkyHigh SOURCE !!

    Github


    .
    26
    Help and FAQ

    THREAD RULES & PROTOCOLS FOR THIS DEVELOPMENT THREAD:

    I might not have your device variant and or able to reproduce your "issue". With this in mind, without providing as much information as possible, and resetting your device to a stable unmodified baseline, any potential troubleshooting or logs could be meaningless. So please follow the guidelines set out below. Thanks

    BY POSTING YOUR ISSUES IN THIS THREAD, YOU ARE AGREE TO HELP YOURSELF FIRST BY PROVIDING INFO REGARDING:

    Code:
    1. DEVICE MODEL ?
    2. ROM and firmware version (build number, boot-loader etc) ?
    3. EXACT steps taken to reproduce YOUR issue
    4. Screen-shots (if applicable)
    5. Did you read Posts #1-3 completely?
    6. Did you search the thread, XDA or GOOGLE?
    7. Did you follow the install instructions EXACTLY?
    8. What was your previous kernel?
    9. Do you have any other known kernel tweaking apps, scripts or mods? ([B]remove them[/B]). [COLOR="Red"]This includes Xposed etc[/COLOR]
    10. Try older kernel (if available)
    11. Factory reset ?
    12. Try latest stock [B]UNMODIFIED[/B] firmware (without custom ROM - if you have installed) and factory reset
    13. Delete your ROM BusyBox (kernel uses it's own in /sbin)


    ONLY IF YOU HAVE TRIED SUGGESTIONS ABOVE:

    Turn on logging in Synapse and save logs AT TIME OF ERROR. AND post together with ALL the above information.

    ELSE, DON'T WASTE MY TIME, YOU WILL BE IGNORED AND/OR POST REPORTED !!


    THANK YOU :good:


    NO FAST CHARGE

    • If using the pathetic original cable, try disconnect and reconnect the USB cable whilst power is still turned on to the charger
    • Use a thicker / better cable, will work every time (ie. Note4 OEM cable)

    CAN I BUILD A KERNEL FOR YOUR __XX DEVICE ?


    I will not build for any device that I can not compile using SAME source, personally test method or debug. Some device variants can compile with same source.
    • Sorry. I don't have the spare time for any more variant support.

    "NO UCI SUPPORT"

    It's a ROM busybox compatibility issue

    Three choices:

    1. Device > settings > applications > Synapse > force close & wipe data and REBOOT

    OR

    1. Remove your ROM busybox from /system xbin and /system/bin (Synapse will use the kernel busybox in /sbin).
    2. Force stop Synapse and delete app data (device settings > applications)
    3. Re-flash kernel as per Installation Instructions

    OR

    1. Try install a different busybox
    2. Force stop Synapse and delete app data (device settings > applications)
    3. Re-flash kernel as per Installation Instructions

    Synapse or BACKUP/RESTORE ISSUES

    It's a ROM busybox or sqlite3 compatibility issue

    1. Remove both your ROM busybox & sqlite3 from /system xbin and /system/bin (Synapse will use it's own from kernel /sbin).
    2. Device > settings > applications > Synapse > force close & wipe data
    3. Reboot or re-flash kernel as per Installation Instructions

    BACKUP & RESTORE

    1. DO NOT restore profiles from different kernel version
    2. Refer to THIS post for "how-to" screen-shots
    3. Refer to THIS post for a "how-to" video (thanks @aldoblaga )

    LOADABLE MODULES AREN'T WORKING

    • Check your /system/lib/modules directory. Are any ____.ko present?
    • Did you flash a ROM or wipe the system partition at any point? Doing this will remove them !
    • Re-flash the kernel will install the modules.
    • If modules aren't installed after flash, then re-flash and manually mount system in recovery first.
    • You can check running modules in terminal with:
      Code:
      lsmod

    KTOONSERVATIVE GOVERNOR

    DT2W & COLOUR CONTROL

    • No, I cannot make it work properly with single source for all supported variants

    CPU POWER CONSUMPTION

    F2FS SUPPORT


    STUCK ON SAMSUNG BOOT LOGO AFTER FLASH

    1. Ensure you flashed the correct kernel for your device model
    2. Ensure your download is not corrupted. Check MD5 hash or re-download
    3. Your current base firmware (ROM, boot-loader version etc.) may be incompatible - UPDATE to latest with Odin and try again.

    CM SUPPORT

    Read Post #12


    "Unauthorized actions have been detected, reboot to undo changes"

    As it's a common warning found with all KNOX enabled android devices, you would have found the answer by Google search and also that it is actually unrelated to kernel and also unrelated to this kernel development..............
    It is caused by the process of rooting/modifying your device. Unless you use KNOX, don't worry.
    [Q] How to disable
    [A] Freeze or delete your KNOX & Security related apps/processes manually (using root explorer or titanium backup (pro) or use Synapse > Security > disable KNOX


    CAN I USE OTHER KERNEL CONTROL APPS


    • No, many features and options won't be available. Remove all other control apps to avoid conflicts !
    • Synapse is the recommended and has everything you need ;)

    BATTERY TIPS


    • Try some (or combination) of the CPU MULTICORE features in Synapse:
      HMP profile = Battery
      Power Aware Scheduling (slight performance cost) = Enabled
      HMP LITTLE Packing (slight performance cost) = Enabled
      PEWQ (power-efficient workqueue) (slight performance cost) = Enabled​
    • Set A57 & A53 Interactive governor profile = Battery
    • Set Input-Booster for key/touchkey profile = Battery
    • Multi-tasking: enable UKSM & "low" or "quiet" profile (slight performance/battery cost)
    • Set all Advanced wake-lock controls to 1, except GPS. Set it to 4
    • Set WiFi wakelock control to 2 or 3


    PERFORMANCE TIPS


    • Set A57 & A53 Interactive governor profile = Performance
    • Set A57 & A53 Interactive governor = Turbo Mode (battery cost)
    • Once in a while:
      Optimize Databases
      FSTrim​


    RANDOM REBOOT

    1. Don't UV or UC CPU or GPU
    2. Use SkyHigh defaults
    3. Use a stock UNMODIFIED ROM for your device variant
    4. No tweaks, Xposed or other CPU control apps installed

    ASV_GROUP (ALL DEVICES ARE NOT CREATED EQUAL)

    This is an example from my Exynos5420 source. Similar idea for Exynos420

    CAN I INCLUDE SkyHigh KERNEL IN MY ROM

    1. Although I do appreciate your contribution here, if you could please do not include my kernel in any ROM package etc. This policy goes for anyone.
    2. Having my kernel distributed outside my development thread just removes a lot of credit and more importantly, constructive user feedback that could be helpful to my development or user issue.

    DOWNLOAD LINK NOT WORKING

    1. I want to keep this project all in one place - ☆☆ NO MIRRORS ☆☆
    2. Please try again in a few minutes

    POOR CPU/GPU BENCHMARK or GRAPHICS PERFORMANCE

    1. Disable any CPU MULTICORE options in Synapse
    2. Disable any Battery profiles in Synapse. Set to default or Performance.
    3. Allow the device to cool. Repetitive testing will heat the device hardware and invoke thermal throttling and lead to decreased benchmark.
    4. HIGH CPU/GPU OC >> excessive heat >> thermal throttling >> reduced clock frequency >> DECREASE PERFORMANCE

    DYNAMIC MANAGEMENT OF DIRTY PAGE WRITEBACKS

    * [Christopher83]

    This feature allows to have two different intervals for dirty page
    writebacks and to dynamically manage them when the system has been
    resumed (it's active) or when has been suspended.

    Three new procfs parameters are exposed inside /proc/sys/vm path:
    - dynamic_dirty_writeback is the activation status of this feature,
    set 1 to enable it, set 0 to disable it and use the standard behaviour
    - dirty_writeback_active_centisecs is the interval for the dirty page
    writebacks when the system is active (screen on)
    - dirty_writeback_suspend_centisecs is the interval for the dirty page
    writebacks when the system is suspended (screen off)

    This feature is in part inspired on Francisco Franco's patch:
    https://github.com/franciscofranco/mako/commit/34d79548cf16b69c7d0154836018e7f258a22947


    TCP/IP NETWORK SECURITY


    * Thanks to zeppelinrox & V6SuperCharger
    1. Hardening the TCP/IP stack to SYN attack
    2. Bump up tw_buckets in case we get DoS'd
    3. Ignore pings
    4. Don't cache connection metrics from previous connection
    5. Don't pass traffic between networks or act as a router
    6. Enable spoofing protection (turn on reverse packet filtering)
    7. Don't accept source routing
    8. Don't accept redirects
    - Further reading:
    http://www.cyberciti.biz/faq/linux-kernel-etcsysctl-conf-security-hardening
    http://www.symantec.com/connect/articles/hardening-tcpip-stack-syn-attacks


    CHROMECAST - STREAMING PROBLEMS


    * Thanks to @AtLmd Post
    • Lock screen MUST be enabled (simple screen lock swipe) I don't know why but it breaks the chromecast app's ability to resume smoothly if switched off
    • Synapse > Network > DTIM (both screen ON & OFF) = 1
    • Synapse > Network > WIFI Power Mode (screen OFF) = FAST

    .
    21
    v3.0 released

    v3.0 update for:

    Early Christmas present for all !! :highfive:

    SM-N920-C / CD / G / I / 0 / 8 device variants

    Check out the change-log in Post #2.

    Tested by UpInTheAir :

    My device setup:
    • SM-N920C
    • 100% stock N920CXXU1AOK7 (THL) firmware
    • No modifications (apart from kernel and TWRP)
    • SkyHigh kernel defaults
    • No Xposed or other tweaks etc.
    • STABLE & RE-BOOT FREE !!


    • Please CLEAR SYNAPSE DATA before flash: device settings > Applications > Application manager > Synapse > force stop > clear data

    • Please read the amended Installation Instructions, especially #8

    • DO NOT restore profiles from older versions or other kernels !


    Have fun :)

    Cheers

    UITA
    21
    v3.3 New Year release

    v3.3 NEW YEAR release for:

    SM-N920-C / CD / G / I / 0 / 8 device variants

    Check out the change-log in Post #2.

    Tested by UpInTheAir :

    My device setup:
    • SM-N920C
    • 100% stock N920CXXU1AOK7 (THL) firmware
    • No modifications (apart from kernel and TWRP)
    • SkyHigh kernel defaults
    • No Xposed or other tweaks etc.
    • STABLE & RE-BOOT FREE !!


    • Please CLEAR SYNAPSE DATA before flash: device settings > Applications > Application manager > Synapse > force stop > clear data

    • DO NOT restore profiles from older versions or other kernels !



    BUGS:
    1. Disabling "Turbo Mode" will screw up frequency scaling. So if you have disabled any time, you need to REBOOT !!
    2. Changing Interactive governor profiles when Interactive is not used, will result in Synapse display errors. Nothing to worry, no need to change the profile if Interactive it not used !

    Have fun :)

    Cheers

    UITA