[KERNEL] [ROOT] [SM-N920T/W8 Exynos 7420] [19 Feb] SkyHigh TW 5.1.1 Kernel [v4.5]

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guaneet

Senior Member
May 16, 2013
1,749
896
Morgan Hill, CA
Thank you for the test kernel! Works great placed a few calls and received a few. Did a couple videos too just for testing purposes. No issue at all. Thanks! Hope you sleep well when you do!

Will provide more feedback as the day progresses
 
Last edited:

aldoblaga

Senior Member
Dec 19, 2009
1,048
570
Cluj Napoca
seems to be working fine. can u enlighten us what u changed from ver 2.2 to make it work? just curious how "serious" the issue was...
 

itsmikeramsay

Senior Member
Mar 25, 2009
5,343
12,239
Atlanta
Alright testing 2.3 test 1 now.

Sent from my SM-N920T using Tapatalk

---------- Post added at 05:36 PM ---------- Previous post was at 05:36 PM ----------

seems to be working fine. can u enlighten us what u changed from ver 2.2 to make it work? just curious how "serious" the issue was...
Read the post with the link for 2.3 test. It'll show you.

Sent from my SM-N920T using Tapatalk

---------- Post added at 05:43 PM ---------- Previous post was at 05:36 PM ----------

So after hearing customer care tell me how much unlimited minutes, text messages, and unlimited data I have left for 5 minutes or so, I haven't experienced a reboot. I'll keep testing to be sure but tool chain seemed to be an issue.

Sent from my SM-N920T using Tapatalk
 

UpInTheAir

Account currently disabled
Jan 17, 2011
7,965
15,909
Phuket, Thailand
Thank you for the test kernel! Works great placed a few calls and received a few. Did a couple videos too just for testing purposes. No issue at all. Thanks! Hope you sleep well when you do!

Will provide more feedback as the day progresses

seems to be working fine. can u enlighten us what u changed from ver 2.2 to make it work? just curious how "serious" the issue was...

Alright testing 2.3 test 1 now.

Sent from my SM-N920T using Tapatalk

---------- Post added at 05:36 PM ---------- Previous post was at 05:36 PM ----------


Read the post with the link for 2.3 test. It'll show you.

Sent from my SM-N920T using Tapatalk

---------- Post added at 05:43 PM ---------- Previous post was at 05:36 PM ----------

So after hearing customer care tell me how much unlimited minutes, text messages, and unlimited data I have left for 5 minutes or so, I haven't experienced a reboot. I'll keep testing to be sure but tool chain seemed to be an issue.

Sent from my SM-N920T using Tapatalk

Thanks all for providing feedback and it seems we are at the bottom of the issue. I'll make the proper reverts visible in my gitHub source in just a short while after my own device is cured of my self induced bootloop :eek:
 

Megaflop666

Senior Member
May 17, 2014
3,500
2,539
Insanity
Can you two please share/compare your device firmware version?

PDA/ROM
Bootloader
Modern
etc etc
I'm on coj5 with Darth stalker v6 and after about half a day and a dozen phone calls I finally got the random reboot during a phone call. I was driving so I couldn't pull a log before it was overwritten.

Heading to test your test kernel.
 
Last edited:

sshafranko

Inactive Recognized Contributor
Feb 5, 2013
5,568
4,906
Little Ferry
I'm on coj5 with Darth stalker v6 and after about half a day and a dozen phone calls I finally got the random reboot during a phone call. I was driving so I couldn't pull a log before it was overwritten.

Heading to test your test kernel.

Looks like hes got it figured out anyway...the toolchain version...im about to flash 2.3 also
 

UpInTheAir

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Jan 17, 2011
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Megaflop666

Senior Member
May 17, 2014
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2,539
Insanity

Fightoffyoredeamons

Senior Member
Apr 17, 2014
316
50
I can't even get my phone to boot with the test kernel. Idk if its because of Darth stalker v6 or what but I've tried two different downloads and it just stays spinning at the Darth stalker splash screen. I'll try again in a bit when I can plug it up to my computer and pull a log.


I have the same exact set up so it's not the rom. Did you clear Synapse settings?
 

UpInTheAir

Account currently disabled
Jan 17, 2011
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Phuket, Thailand
v2.3 released

v2.3 update for SM-N920-T / W8 device variants

Same as v2.3_TEST-1 + a few extra commits. Check out the change-log in Post #2.

Not tested > I have a SM-N920C

  • XDA RULE #1 'SEARCH BEFORE POSTING". Please READ Posts #1-3 BEFORE flashing !!
  • Please CLEAR SYNAPSE DATA before flash: device settings > Applications > Application manager > Synapse > force stop > clear data

Have fun :)

Cheers

UITA
 

aldoblaga

Senior Member
Dec 19, 2009
1,048
570
Cluj Napoca
v2.3 update for SM-N920-T / W8 device variants

Same as v2.3_TEST-1 + a few extra commits. Check out the change-log in Post #2.

Not tested > I have a SM-N920C

  • XDA RULE #1 'SEARCH BEFORE POSTING". Please READ Posts #1-3 BEFORE flashing !!
  • Please CLEAR SYNAPSE DATA before flash: device settings > Applications > Application manager > Synapse > force stop > clear data

Have fun :)

Cheers

UITA

thank you again! can you give us an idea as to..what s next? i mean in the next version of the kernel? do u have any priorities?
 

UpInTheAir

Account currently disabled
Jan 17, 2011
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Phuket, Thailand
thank you again! can you give us an idea as to..what s next? i mean in the next version of the kernel? do u have any priorities?

- More Note5 variant support
- UKSM
- KT governor ?
- PEWQ changes
- SELinux permissive / enforcing experiments
- Fix root being left as r/w. Should be r/o
- Toolchain - think we can do better than a 2014 build
- Headset audio - not work during calls (try take a look)
- update build scripts for gitHub to include ramdisks and auto re-pack to boot.img (will take loads of time and testing)
- Further Synapse additions and tweaks
- Update my Tab-S kernels !
.
.
.
- List goes on and on, but not all at once
 

aldoblaga

Senior Member
Dec 19, 2009
1,048
570
Cluj Napoca
- More Note5 variant support
- UKSM
- KT governor ?
- PEWQ changes
- SELinux permissive / enforcing experiments
- Fix root being left as r/w. Should be r/o
- Toolchain - think we can do better than a 2014 build
- Headset audio - not work during calls (try take a look)
- update build scripts for gitHub to include ramdisks and auto re-pack to boot.img (will take loads of time and testing)
- Further Synapse additions and tweaks
- Update my Tab-S kernels !
.
.
.
- List goes on and on, but not all at once

you ve got quite some work to do! dunno if you re into this but..may the force be with you :)) it s certainly strong in you ;) or maybe you prefer the slogan "may the odds be ever in your favor" ? :D
 

UpInTheAir

Account currently disabled
Jan 17, 2011
7,965
15,909
Phuket, Thailand
Linaro TC

Just testing Linaro toolchain 5.2 used by Arter. No in-call reboots unlike the newer 5.2.1...................

I'll give it a good test :)

Edit: unfortunately, false hopes. perhaps there are a few patches somewhere to help. A lot of trial and error...........
 
Last edited:

jdidtht

Senior Member
Sep 23, 2012
2,665
1,531
minneapolis
Just testing Linaro toolchain 5.2 used by Arter. No in-call reboots unlike the newer 5.2.1...................

I'll give it a good test :)

Edit: unfortunately, false hopes. perhaps there are a few patches somewhere to help. A lot of trial and error...........
Your time is much appreciated.. glad your back man.

Sent from my SM-N920T using Tapatalk
 
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    [KERNEL] [ROOT] [SM-N920T/W8 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://xdaforums.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: N920TUVS2COKC
    * 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 TMO Kernel, Kernel for the T-Mobile Samsung Galaxy Note5

    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 2015-10-05
    Last Updated 2016-03-04
    33
    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 v4.4.1 > 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-N920T
      SM-N920W8​
    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 previous SkyHigh kernel > Device settings > Applications > Synapse > Force Stop > clear data​
    6. If not installed > Install SuperSU from Google Play:
    7. Boot into custom recovery and flash SkyHigh_kernel____.zip FOR YOUR DEVICE and reboot
    8. 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


    Note5 SM-N920-T / W8 [ v4.5 ]

    ________________________________________________________________________

    Note5 SM-N920P thread > HERE

    ________________________________________________________________________

    OTHER Note5 international & dual SIM thread > HERE

    ________________________________________________________________________

    S6 Edge+ SM-G928T / W8 thread > HERE

    ________________________________________________________________________

    S6 Edge+ SM-G928C/F/G/I thread > HERE

    ________________________________________________________________________

    S6 Edge+ SM-G928P thread > HERE



    SOURCE

    ALL KERNELS COMPILED WITH SAME SkyHigh SOURCE !!

    Github


    .
    19
    Help & 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

    .
    17
    v3.7 released

    v3.7 update for

    SM-N920-T / W8 device variants

    Check out the gitHub Change-log (link in Post #2).

    Not personally tested > I have a SM-N920C


    • 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
    16
    @UpInTheAir
    @faslane
    @muffinsmuffy


    Members,

    I came into this thread on a report of abuse to clean it up and sort out the troublemakers, lo and behold, it's the entire thread!
    OP, I understand you're busy and want things to stay on topic. You and your followers like to quote rules, especially rule #1 - "Search before posting"; well let me return the favor by quoting a few of my favorites...

    2.3 Flaming / Lack of respect: XDA is about sharing and this does not involve virtual yelling (flaming) or rudeness. Flaming or posting with a lack of respect is unacceptable. Treat new members in the manner in which you would like to have been treated when you were a new member. When dealing with any member, provide them with guidance, advice and instructions when you can, showing them respect and courtesy. Never post in a demanding, argumentative, disrespectful or self-righteous manner.
    There are literally pages and pages of you, your followers and others that have come into this thread doing exactly what this rule says not to. If I were to clean up every comment that belittles, berates or offends someone, their intellect or their abilities, you wouldn't have much of a thread left here my friend.

    10. Help others if you can.

    If you see posts from others where you can help out, please do so. This place exists because people are helping each other, and even if you are relatively new to the matter, there's probably quite a few people with less experience than you, who could benefit from what you've learned. Don't be shy.
    Posting for others to google search something or read the OP is absolutely fine, but keep in mind that not everyone will turn up the same results you did, either because they are unsure what they are looking for, or they have searched a different query string. It happens. Do we at XDA expect hand holding and spoon feeding? No, but we do expect more than our developers just dumping a project in the forums and referring people to the OP that may or may not have the requested information. As for the rest of the members, when they begin to get belligerent with other users, as the OP it's your job to keep your threads on topic and friendly. We are here to assist you, clean whatever needs to be cleaned and sort out the riffraff, but we can't do that if it's not reported or you include yourself in it.

    You realize this back and forth does little for anyone at this point. This isn't Facebook, I am assuming you have made your point? Otherwise you are just making more posts people will have to scroll through looking for answers.

    Sent from my SM-N920T using Tapatalk
    You are exactly right, took the words right from my mouth.

    Now, let's get this thread back on topic and keep it friendly.