[JDCTeam] Optimized LineageOS18.1 v9.0 [11Apr]

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Mpoumpounas

Member
Jul 27, 2013
10
0
While using this rom to surfing the net, i noticed the cam icon to appear at the notification tray.
This happened for about 1 second.
Does this means that something was using my cam? Rom is unrooted without any extra apps.
Is this a spy rom???!
 

Retrial

Recognized Contributor & Translator
Jun 10, 2015
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Samsung Galaxy S4
Xiaomi Poco F1
While using this rom to surfing the net, i noticed the cam icon to appear at the notification tray.
This happened for about 1 second.
Does this means that something was using my cam? Rom is unrooted without any extra apps.
Is this a spy rom???!
Hi Mpoumpouna! I think your username matches with your phrase "Is this a spy rom????!" :LOL:
To answer your question, no, this is not a spy ROM. You can also check the code by yourself since it's open source.
Please give more infos when you say "while surfing the net". What apps you have opened and you used, what browser?
 

Mpoumpounas

Member
Jul 27, 2013
10
0
Hi Re-trial ! I was using Chrome to browse some news sites! No chatroulette-like sites!
Suddenly the cam icon appeared next to the wifi icon at the top right corner!
The same icon that appeared when the camera is in use!
Nothing else was opened!
I have also installed nano open gaps and no root!
If was spy, hope not to use the front cam; i am shy!
 

Retrial

Recognized Contributor & Translator
Jun 10, 2015
1,719
3,594
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Samsung Galaxy S4
Xiaomi Poco F1
Hi Re-trial ! I was using Chrome to browse some news sites! No chatroulette-like sites!
Suddenly the cam icon appeared next to the wifi icon at the top right corner!
The same icon that appeared when the camera is in use!
Nothing else was opened!
I have also installed nano open gaps and no root!
If was spy, hope not to use the front cam; i am shy!
Don't worry mpoumpounako. We watching you right now, you are cute tho 🙃

Check the website settings on chrome. Disable camera. (And btw don't use Chrome - Use Brave or Bromite)
Maybe the site you tried to visit wanted access to your camera.

Is the led turned blue when you saw this camera icon? Optimized LineageOS has a security feature when the camera is open the led turn on with blue colour.
 

Mpoumpounas

Member
Jul 27, 2013
10
0
Well, i don't remember about the blue led!
However I will disable camera access to chrome but I can't promise to use another browser!
I will trust your words(You seem honest) that this is not a spy rom and I will check if this happens again!
Till then, please delete from your servers the picture of me! Thanks!
 

Retrial

Recognized Contributor & Translator
Jun 10, 2015
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3,594
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Samsung Galaxy S4
Xiaomi Poco F1
Well, i don't remember about the blue led!
However I will disable camera access to chrome but I can't promise to use another browser!
I will trust your words(You seem honest) that this is not a spy rom and I will check if this happens again!
Till then, please delete from your servers the picture of me! Thanks!
The browsers I suggested are based on chromium but with privacy and security in mind compared to chrome, so you will not see big difference on layout. It's up to you tho.

Well, it's not spy rom 101%. Side, the dev of the ROM, is very poppular on this community for so many years and also working together with Official LineageOS devs. You can also join us in the slack for chat.
Probably the site you tried to visited wanted to access your camera for some reason. I am not sure. As I said the ROM has a security feature implemented by side which turn the led on with blue color whenever the camera is on.

Sorry, we can't do that, we keep a backup of all cute faces 😝

Btw you can take a look on my S4 Unified Collection & Guides thread, and check the privacy & security guide.
 
Last edited:

Solway

Senior Member
May 20, 2011
89
33
Cornwall, UK
my S4 just died :(
power button is sticking. managed to boot again with a bit of massaging

going to keep this as a backup phone now.

@side
is there a way to modify the rom, to either swap power button to a volume button. or better still, when it gets put on charge it auto boots the phone.
ive googled the autoboot when plugged in, but cant seem to get it working.
 

Trubbs

Member
Jul 25, 2014
47
35
Since some years from cyanogen on HTC buzz I have followed, used cm and los roms. For some time I have become disillusioned with android, it seems to have become a data hoover for the planet's most successful marketing machine. The potential is massive, the reality is pants. Disappointing....

My humble S4 gives my daily driver OP7pro5G a run for its money!

Massive kudos to @side and the whole jdc team @Retrial special mention for the guides.

Playing with linux for mobile, I have a family of rpis, dot net c# Dev, 40yrs system experience , day job is looking after some of the most powerful systems on the planet.

Light bulb moment, the side does not use gapps so I cut the cord and did it side style and wow, what a difference! Slick, smooth and wow that battery life.

GT I9505 UK GiffGaff vmo on O2 network
Optimised JDC 18.1 v5
No gapps
Magiak
FDroid
Aurora
Netflix
Amazon Prime Video
BBC Sound & iPlayer
Brave browser
Naptime / Servicely
PowerAmp
MiXplorer
Bitwarden
Vanced Manager
VLC
And for the rpis
Termius
RealVNC

The only bugbear is stupid Cromecast Ultra is mardy without GooHome. VLC from DNLA from OpenMediaVault on rpi3 works ok.
I note the bounty on MicroG for Chromecast... ah if only I had more time 😎

@side I just got promoted and will share the love 😍

Thanks team, appreciate the work
 

gnikolson

Member
Dec 27, 2020
17
10
I am sad, you support the device for many years, I was hopping for Android 12, Ευχαριστώ για όλα αυτά τα χρονια υποστήριξης, μάλλον το android 11, ειναι το τελευταίο που υα δούμε στο s4.
 

Retrial

Recognized Contributor & Translator
Jun 10, 2015
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Samsung Galaxy S4
Xiaomi Poco F1
I am sad, you support the device for many years, I was hopping for Android 12, Ευχαριστώ για όλα αυτά τα χρονια υποστήριξης, μάλλον το android 11, ειναι το τελευταίο που υα δούμε στο s4.
I guess Official LineageOS will update to A12, so it won't be the last Android for S4.
Side, needs a co-dev to help him with ROM because the time is pressure for him and also to update his pc hardware. He may come back in future if anyone willing to help 🙃
 

therob2

Member
Jun 17, 2020
30
6
I also hope you will stay, side ;-)

Short question: having quite bad battery life (<< 1day) with new battery and opt-LOS-5.0 I ask my if it would be worth to update the modem file from I9505XXUHPK2 (latest official from 2017) to I9505XXUHQK1 (latest from 2019). Any thoughts that it could be any better afterwards (I know without logs and system details its hard to say ... just a rough guess maybe)?

Strange enough, additionally I have same problem but only with one of four GT-I9515 (especially after enabeling 4G/LTE). Will give also a try in update the modem file.
 

pocketrule

Senior Member
Sep 23, 2016
381
512
... bad battery life (<< 1day) with new battery ... if it would be worth to update the modem file from I9505XXUHPK2 (latest official from 2017) to I9505XXUHQK1 (latest from 2019). Any thoughts that it could be any better afterwards ...
That COULD be of help, if the newer modem improves the connection to your provider / wifi access point. I'd give it a try. I9505XXUHPK2 worked great for me a long time, but I've also updated to I9505XXUHQK1. If the first one works for you, the second one will at least work as great.

Regarding your battery issue: Well - of course - first and foremost, battery life will depend on your usage... And often, after a fresh flash, battery life is terrible, because of optimisations and updates (especially if you've flashed gapps, too). Let the device work in the background 1-2 days and battery time should improve (at least when in idle).

If not, you should check out battery apps which could help to narrow down, if the rom is causing the battery drain or an app. I've written something more about it here.
 

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  • 47
    Optimized LineageOS 18.1
    brought to you by the Jflte DevConnection Team

    ⚠️ DISCLAIMER ⚠️
    Your warranty is now void.
    We are not responsible for bricked devices, dead SD cards, thermonuclear war, or you getting fired because the alarm app failed.
    Please do some research if you have any concerns about features included in this ROM before flashing!
    YOU are choosing to make these modifications and if, YOU point the finger at us for messing up your device, WE will laugh at you.

    FEATURES 💫

    • Based on Official LineageOS 18.1 - Android 11
    • Latest Security Updates integrated
    • Improved Speed, Stability, RAM usage & Battery drain
    • Powered by Buffcore Kernel - some / most / all of the following may or may not be hooked up yet.
    • Many, many more - install and see for yourself!;)
    • Buffcore 10

      • set config_hz to 300
      • add intelliplug
      • tweak our touch boost
      • add color control tweak
      • stop lowclocks from defconfig
      • build with gzip
      • quickwakeup - the kernel can semi-wakeup and decide if needs to end suspend or return to suspend with losing
      • doze
      • fully optimized toolchain flags
      • reduced sleep timeout
      • dynamic file syncing - early_suspend and dyn_fsync by default
      • print to dmesg log when a suspend gets broken
      • sdfat enabled
      • fastcharge implemented (up to 1900 ac / 1600 usb)
      • bcmhd wakelocks for rx and tx halved
      • libmemcopy and libstring sped up
      • io readahead to 1024k
      • power efficient work queues
      • voltage tweaking user interface
      • faster vmstat
      • autosmp hotplugging replacement
      • mmc crc disabled
      • allow for lower cpu voltage
      • reduce swapiness
      • optimize divide / multiply by power of 2
      • added tcp optimization options
      • set westwood default
      • optimize cbfillrect function
      • reduce wifi wakelock times
      • nohz: reduce overhead under high-freq idling patterns


    SUPPORTED DEVICES 📱

    • GT-I9505 (jfltexx)
    • GT-I9505G (jgedlte)
    • GT-i9507 (jtfddxx)
    • GT-i9508 (jfltezm)
    • SCH-I545 (jfltevzw) VERIZON USERS: since your Bootloader is locked, you must be on the VRUAMDK
    • SCH-I545L (jfltelra)
    • SCH-R970 (jflteusc)
    • SCH-R970C (jfltecri)
    • SCH-R970X (jfltecsp)
    • SGH-I337 (jflteatt) AT&T USERS: since your Bootloader is locked, you must be on the UCUAMDB or UCUAMDL
    • SGH-I337M (jftlecan)
    • SGH-l337Z (jfltecri)
    • SGH-M919 (jfltemo)
    • SGH-S970G (TracFone / Straight Talk)
    • SM-S975L (TracFone / Straight Talk)
    • SPH-L720 (jfltespr)
    • SPH-l720T (jflterefreshspr)
    • jfltezm - China Mobile
    • jfltetfnatt
    • jfltetfntmo
    Do 'getprop ro.bootloader' in Terminal Emulator or through ADB shell to find out which Bootloader you have.


    DOWNLOADS ⏬



    GAPPS 🤖

    You can use Pico or Nano Open GApps / Open GApps A11 (Test Build) or BitGApps or MindTheGApps
    Be sure you have selected Platform: ARM and the proper Android version of the ROM you are going to flash. If the ROM you want to flash include GApps, no need to download and flash any GApps at all.


    TWRP 🛠️

    You can use either the latest and recommended Official TWRP Recovery or JDCTeam Recovery to flash the ROM.
    If you have a variant with a locked but exploitable Bootloader like AT&T and Verizon then use the TWRP Recovery Locki Patched by mattgyver.



    SAMSUNG GALAXY S4 UNIFIED GUIDES & COLLECTION 👨‍🏫

    You can follow the well-explained steps to install a ROM, find and download the latest Bootloader & Modem for your variant from the S4 Unified Guides & Collection thread by Retrial.


    JDCTEAM UNIVERSE 🪐

    You can find the total work of JDCTeam over the years HERE.


    SOURCE CODE 👨‍💻
    Avaible at JDCTeam GitHub

    CREDITS 🏅
    Side - Lead Developer / The Boss
    Buff99 - Minor Developer / Major Meddler
    JDC Team
    LineageOS
    OpenGapps


    JDCTeam 🪐
    Buff - Buff99
    Chibbo - Chibbo
    Creeper - Creeper36
    Diego Monaco - alucard_24
    Dimitris Katikaridis - side
    Franck Rohée - franzyroy
    George Mantratzis - Retrial
    Ray Daley - gadget!
    Jim Silverlock - Jsilver73
    Marco Zanin - -+BB+-
    Matthew Booth - MattBooth
    Mattia D'Alleva - AntaresOne
    Mike Atkins - FernBch
    Oliver - angelcalibur
    Paul Harris - hawkerpaul
    Paul Keith - javelinanddart
    SalimPS - SalimPS
    Simeon Ivanov - smstiv
    Stefano Meroni - smeroni68
    Yannis Menexes - SkL*
    Vasileios Moisiadis - vmroot


    You are welcome to join the Official JDC Team chat/test group in Slack 🗣️
    19
    Released v2

    Changes:
    • Huge kernel changes
    • Refactored UI and jvm flags for performance
    • Tweaked our thermal performance
    • New touch boost implementation
    • Default battery icon = circle
    • bring back samsungdoze
    • change ledify pattern on boot
    • Set SELinux to enforcing
    • Change touch UI sounds
    • New sounds and dropped some ugly sounds
    • Bring up a better launcher
    • Update to R_27
    • New wallpaper
    • Lockscreen charging is now enabled
    • Fix Snap bug where user couldnt open gallery on the just-taken photo
    • Enable development options by default
    • Remove some pinned-to-RAM apps in order to have more RAM available
    13
    hi everyone.
    I just released the v3 at drive. thanks and sorry for delay and lack of changelog

    lockscreen: Hide the lock icon
    settings: dashboard: Hide suggestions
    touch optimizations
    leds on boot are now colorful
    updated to _r34
    Many many MANY kernel updates from LineageOS
    Latest AOSP changes
    11
    Good evening and happy new year people.

    V7.0 is released with updated Android11 revision, security patches etc while random application / gapps crashes are fixed.

    Android12 ............here we go!!
    10