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[DISCUSSION][4.3] Knox Bootloader

As most users know, people who flashed Sammy's 4.3 stock with ODIN have the infamous and (yet) unremovable Knox bootloader. This bootloader is known for causing numerous FC's, freezes and random reboots to people who flash custom roms/kernels.
For me (and for most users, I believe), the custom roms/kernels are the main reason why I love Android (and xda too), thus the Knox bootloader has became one hell of a headache for me and other people who unfortunately have been naive enough to flash stock 4.3 in the early days.
It doesn't matter if we have flashed the Knox bootloader by oversight, or just because we didn't know it was included in the stock 4.3 (as the i9300 stock 4.3 was Knox free). What does matter, is that many people are now having problems in enjoying their favorite custom roms and kernels thanks to this evil invention by Samsung.
Therefore, and as I didn't see any thread like this one, I created this thread so we can discuss what we can do to, at least, minimize the problems cause by this bootloader. I am not even dreaming with restoring our warranty. At this moment, I just want to peacefully enjoy the custom roms and kernels that the great developers of xda release for our beloved I9305.
Although I haven't seen many developers talking about this problem in our device's threads, I noticed that some have already tried to trick the bootloader and avoid the FC's (like @Hbohd, for example). However, I think that this is a huge task and should be done with the help of everyone. I know by first hand that we have many talented developers working for our device (and for others too) and I'm sure that we, united, could, at least, try to do something about this and teach Samsung not to mess with our devices. I have always stood for the policy that says "I've paid for my device, thus I should be able to do anything I want with it".
Note: If any of you developers have some idea but don't know how to test it because you don't have the Knox bootloader, I don't mind to test it on my I9305 (and I'm sure that other users don't mind too). I'm using Alliance ROM v2+ with Boeffla Kernel v5.1+ and Knox bootloader.
Let's start the brainstorming: (I warn you guys that I don't know much about Android developing, so please bear with me if I say any stupidity)
- As we know, our brother i9300 doesn't have Knox included in stock 4.3. As one the main differences between I9300 and I9305 is the RAM, maybe this Knox thing is something that uses some RAM?
- I can reproduce a FC that only happened to me since I have Knox (I am supposing that Knox-free 4.3 users don't have this FC): everytime I benchmark my I9305 with AnTuTu, it FC's in the 3D test. Always. Maybe Knox is related to Mali drivers?
- Can we trick the Knox bootloader by changing SELinux status or Samsung root restriction status? @Hbohd already tried something like that but it didn't seem to be conclusive. But I guess that at this point no possibilities should be eliminated.
- And what about restoring the old bootloader from 4.1.2? We already know that restoring previous nandroid backups or flashing stock 4.1.2 from ODIN are useless...
So, what you guys think?
Please, be free to say anything you want, as long as it is on topic. In my opinion, we are currently far away from the solution so any help is welcome

I have Knox and running cm 11 no problems here..
Flash counter is at 6 maybe its The boeffla ?
Tested antutu no problems here
Sent from my GT-I9305 using xda app-developers app

toeterbaas said:
I have Knox and running cm 11 no problems here..
Flash counter is at 6 maybe its The boeffla ?
Tested antutu no problems here
Sent from my GT-I9305 using xda app-developers app
Click to expand...
Click to collapse
Well, that's a surprise to me, thanks for informing.
Regarding what you said, it seems that Knox only brings problems when you use a custom stock based ROM or Kernel (or both).
However, you (and other people who have Knox + non-stock ROMs) would still benefit from a possible solution that would revert our bootloader and restore our warranty. If that is ever possible

My counter is on 4 but for knox there is a special/ extra counter.
Maybe some modders can try let the boot loader think that the
moded kernel is an original stock kernel?
name installation scripts with original kernel letters
and is it possible to make the modded kernel with same filesize
like stock kernel?
regards
sonic76

I think is custom kernel wich causes all your troubles . I experienced same problems , even network signal loss with custom kernel .
Lately I am using kenar2's deodexed , rooted rom with kernel replaced to the original . I have no problem and battery life is great . I uninstalled all bloat including Knox software .
Let's give custom kernels some time to mature and I think we can continue to use them and custom roms like we used to do.
Of course we have to live with voided warranty .

I do use a custom ROM.
Its cm 11 but The kernel is standard and i have zero problems here.
I used other roms to no problems.
I had problems with stock ROM rooted and boeffla kernel.
So it must be The kernel.
I am not affraid of The waranty because never ever one of nu phones broke from Samsung and i had a lot of Samsung phones
Sent from my GT-I9305 using xda app-developers app

Not sure if anyone has mentioned this before, but I will describe the FC/freeze behaviour in a bit more detail, based on my experiences running boeffla for at least a few days. My config is stock rom (self-rooted), knox bootloader. I do run a few xposed mods but turning xposed off doesn't seem to affect the problem.
- At boot everything is perfect. I can open any app without force close.
- After an hour or two, or it may be related to the number/type of apps opening, force closes or freezes will begin.
- Some apps seem to force close more than others. Chrome force closes often but other apps like stock internet seem generally OK.
- Often, after the first FC (or a few), the app will not be able to run again (launching it results in immediate FC or black screen).
- The longer the phone is on (or perhaps in use), the more FC's will occur. Eventually, I even had system apps (e.g. Settings) FC/refuse to open and the phone becomes unstable enough to reboot. It doesn't seem to get much worse when idling though - phone generally stays stable overnight (if it was stable when I went to sleep).
BTW, has anyone requested updated i9305 sources yet from samsung or knows the best process to do so?

oswade said:
Not sure if anyone has mentioned this before, but I will describe the FC/freeze behaviour in a bit more detail, based on my experiences running boeffla for at least a few days. My config is stock rom (self-rooted), knox bootloader. I do run a few xposed mods but turning xposed off doesn't seem to affect the problem.
- At boot everything is perfect. I can open any app without force close.
- After an hour or two, or it may be related to the number/type of apps opening, force closes or freezes will begin.
- Some apps seem to force close more than others. Chrome force closes often but other apps like stock internet seem generally OK.
- Often, after the first FC (or a few), the app will not be able to run again (launching it results in immediate FC or black screen).
- The longer the phone is on (or perhaps in use), the more FC's will occur. Eventually, I even had system apps (e.g. Settings) FC/refuse to open and the phone becomes unstable enough to reboot. It doesn't seem to get much worse when idling though - phone generally stays stable overnight (if it was stable when I went to sleep).
BTW, has anyone requested updated i9305 sources yet from samsung or knows the best process to do so?
Click to expand...
Click to collapse
Did you tried different version of boeffla and the yank kernel to.

Why do you think you have knox bootloader? Even if you have it, question is does it work in a way it works on newer devices, where according to Samsung, bootloader uses eFuse to flash/check knox flag.
When you reboot into download mode, do you see knox flag mentioned. Counter someone above mentioned has nothing to do with knox, and can be set zero with triangle away, chain fire's app.
Sent from my GT-I9505 using Tapatalk

You cant set Knox to 0×0
Only ROM counts :thumbup:
Sent from my GT-I9305 using xda app-developers app

toeterbaas said:
I do use a custom ROM.
Its cm 11 but The kernel is standard and i have zero problems here.
I used other roms to no problems.
I had problems with stock ROM rooted and boeffla kernel.
So it must be The kernel.
I am not affraid of The waranty because never ever one of nu phones broke from Samsung and i had a lot of Samsung phones
Sent from my GT-I9305 using xda app-developers app
Click to expand...
Click to collapse
On AOSP roms there are no problems. They appear on 4.3 Samsung Stock roms + Knox bootloader + custom kernel.
oswade said:
Not sure if anyone has mentioned this before, but I will describe the FC/freeze behaviour in a bit more detail, based on my experiences running boeffla for at least a few days. My config is stock rom (self-rooted), knox bootloader. I do run a few xposed mods but turning xposed off doesn't seem to affect the problem.
- At boot everything is perfect. I can open any app without force close.
- After an hour or two, or it may be related to the number/type of apps opening, force closes or freezes will begin.
- Some apps seem to force close more than others. Chrome force closes often but other apps like stock internet seem generally OK.
- Often, after the first FC (or a few), the app will not be able to run again (launching it results in immediate FC or black screen).
- The longer the phone is on (or perhaps in use), the more FC's will occur. Eventually, I even had system apps (e.g. Settings) FC/refuse to open and the phone becomes unstable enough to reboot. It doesn't seem to get much worse when idling though - phone generally stays stable overnight (if it was stable when I went to sleep).
BTW, has anyone requested updated i9305 sources yet from samsung or knows the best process to do so?
Click to expand...
Click to collapse
Thanks for your input, that is something new man !
In fact, I have just seen a new sourcedrop for our i9305 - might be interesting!!!

Hbohd said:
Thanks for your input, that is something new man !
In fact, I have just seen a new sourcedrop for our i9305 - might be interesting!!!
Click to expand...
Click to collapse
no worries .
Nice, i hope the sources provide us with an easy fix!

Post some of the dumpstate_app_error.txt.gz from data/log after the fcs
Sent from my GT-I9305 using Tapatalk

Edit: forgot to turn on logger

Goldie said:
Post some of the dumpstate_app_error.txt.gz from data/log after the fcs
Sent from my GT-I9305 using Tapatalk
Click to expand...
Click to collapse
Here is mine, right after AnTuTu FC in 3D test.
I rebooted the phone, forced the FC by doing a 3D benchmark and then uploaded the file. I hope it is what you want

Thanks but you need to turn logging on in boeffla settings first
Sent from my GT-I9305 using Tapatalk

Goldie said:
Thanks but you need to turn logging on in boeffla settings first
Sent from my GT-I9305 using Tapatalk
Click to expand...
Click to collapse
You're right... My bad! Here it is again, same procedure...

I have an idea how to restore knox-free bootloader, maybe all we need is unbrick SDCARD (like for i9300 http://forum.xda-developers.com/showthread.php?t=1916796) made on i9305 with 4.1.2 room. I have heard of several cases where I9305 came into SDCARD mode and overwrite curent bootloader with data of the sdcard. For go in to SDCARD mode they hold volume up + volmne down + home + power in the same time.
All I need is dd image for unbrick SDCARD for i9305 and I will try.
Sorry for my english.

guys try out boeffla beta 12. i think it has fixed the knox bootloader problems but itll be good if someone else can confirm.

oswade said:
guys try out boeffla beta 12. i think it has fixed the knox bootloader problems but itll be good if someone else can confirm.
Click to expand...
Click to collapse
I have Internet FC, Gapp's FC, my mobile was 2 times down means display black and mobile won't wake up,
no reaktion by long press power button so i have to pull out the battery....!
I have boeffla beta 12 with no tweaks over boeffla app!
regards
Sonic76

Xposed is not working for weeks (Reboot after installing)

Guys, every time I try to install Xposed for my SM-G920F (I´m 100% sure that I use the correct files every time), my device reboots after entering the pin code.
I had already flashed stock a completely new stock rom via Odin, Wiped Data/Factory Reset and installed XtreStoLite newest version.
Nothing helps.
I remember I did something wrong with "Kernel Auditor" in the past. (I think I done something with "Enable on Boot") Since then my device reboots every time I install Xposed.
I hope someone does have another Idea, I really miss xposed

Flash arter97 twrp recovery and kernel. Then flash wannam version of exposed for lollipop/ marshmallow.. And cheers*

kforkai said:
Flash arter97 twrp recovery and kernel. Then flash wannam version of exposed for lollipop/ marshmallow.. And cheers*
Click to expand...
Click to collapse
Thanks for the help mate, I followed your steps but still not working.
Xposed is installing successfull, but after I activate some xposed modules like Amplify or xTouchwiz the device reboots immediately.
I really don´t know what´s causing that.
Any other help, Im really pissed right now (sorry)

memocatcher said:
Thanks for the help mate, I followed your steps but still not working.
Xposed is installing successfull, but after I activate some xposed modules like Amplify or xTouchwiz the device reboots immediately.
I really don´t know what´s causing that.
Any other help, Im really pissed right now (sorry)
Click to expand...
Click to collapse
Im using sm-g929i mm6.0.1
Amplify doind good overe here. I coulndt get pass the samsung logo When I installed both xtouchwiz and xprivacy at the same time. Enabled both modules and the hp.
Solved that by pressing vol down, home and power. Release right away when the phone restarted.

BLUBOO D1 - Development & Support

In order to keep this thread clean, please use this one to discuss about Development, Support or Software Updates.​
ROMs:
To avoid any possible issue, do not forget to backup your NVRAM so that you won't risk to lose your IMEI. How-to: http://www.anythingultimate.in/2015/11/how-to-backup-your-nvram-partition.html
Stock (Android 7.0)
- F9E62.LTXI.HB.H.SSXS5MA.0623.V3.05: https://drive.google.com/file/d/0BwnyLckVrygrMm1rLXVSQjZHcnM/view
DO NOT USE THE "Format All & Download" OPTION IF YOU CARE ABOUT YOUR IMEI! Choose "Firmware Upgrade" instead.
Previous Releases:
None yet.
Flash Tool
- SP Flash Tool for Windows and Linux: https://mega.nz/#F!dYUm0TbB!SWeMLb5Wu1NbRzTPQ8-s_A​
Recovery:
- TWRP 3.1.0 by @hsagent : https://mega.nz/#!NAVlSKiI!ySZSJEmo32_okp5k0fA2miG0dhoRfTL8m7_QOmwOYjI​
Root:
Rooting Methods (if you are on Stock ROM)
- SuperSU (flashable using TWRP): http://forum.xda-developers.com/apps/supersu​
Extras (Root-Only):
Customization
- Xposed Framework (not available on Nougat yet): http://forum.xda-developers.com/showthread.php?t=3034811​
Useful Third-Party Apps:
Battery Life
- Amplify: https://play.google.com/store/apps/details?id=com.ryansteckler.nlpunbounce&hl=en
- Greenify: https://play.google.com/store/apps/details?id=com.oasisfeng.greenify&hl=en​

Thank you very much for the stock rom and the recovery but I had a problem... I flashed the recovery but the phone didn't boot. So I flashed the stock rom hoping it would return as new but the phone is still bricked. It only vibrates like it's booting but nothing else happens. It can't also enter in the recovery mode for some reason. Any ideas on what can I do? Thank you for the support

Il_Musce said:
Thank you very much for the stock rom and the recovery but I had a problem... I flashed the recovery but the phone didn't boot. So I flashed the stock rom hoping it would return as new but the phone is still bricked. It only vibrates like it's booting but nothing else happens. It can't also enter in the recovery mode for some reason. Any ideas on what can I do? Thank you for the support
Click to expand...
Click to collapse
Low Battery. (this is what my device does when the battery is empty, vibrates but doesn't turn on)

Charger
Be careful with the charger, mine blew up the very first time I used it, 10 min after unboxing.

Thank you very much, I've successfully installed TWRP to my new device and rooted it.
I have one "issue" with phone, it's not related to root and TWRP, but hopefully you can help me. I'm running latest stock ROM (V3.06). I'm used to run Profile Scheduler for switching WiFi On/Off, changing Ringtone to Vibrate mode etc. This app is able to change profiles based on cell towers ID's. But on Bluboo D1 it doesn't work correctly. I can create profile, define cell towers ID's and run it, it switches profile when ran first time, but after some time it's notification icon disappears and app is not changing profiles then. Based on my observation it's happening after several minutes of non-using phone. I think it's caused by Doze which is killing background service of app. I tried to exclude this app from Doze in Settings/Battery, but no luck. Then I tried app called Disable Doze, it displayed that Doze is disabled after I used it's toggle for Doze disabling, but again no luck and Profile scheduler was killed after few minutes
Do you have any idea how to disable Doze on this device permanently? Or do you have suggestion to any other Profile scheduling app which si working on this Phone?
Many thanks in advance

littlebat said:
Be careful with the charger, mine blew up the very first time I used it, 10 min after unboxing.
Click to expand...
Click to collapse
Hi, i have the same problem

Clight75 said:
Thank you very much, I've successfully installed TWRP to my new device and rooted it.
I have one "issue" with phone, it's not related to root and TWRP, but hopefully you can help me. I'm running latest stock ROM (V3.06). I'm used to run Profile Scheduler for switching WiFi On/Off, changing Ringtone to Vibrate mode etc. This app is able to change profiles based on cell towers ID's. But on Bluboo D1 it doesn't work correctly. I can create profile, define cell towers ID's and run it, it switches profile when ran first time, but after some time it's notification icon disappears and app is not changing profiles then. Based on my observation it's happening after several minutes of non-using phone. I think it's caused by Doze which is killing background service of app. I tried to exclude this app from Doze in Settings/Battery, but no luck. Then I tried app called Disable Doze, it displayed that Doze is disabled after I used it's toggle for Doze disabling, but again no luck and Profile scheduler was killed after few minutes
Do you have any idea how to disable Doze on this device permanently? Or do you have suggestion to any other Profile scheduling app which si working on this Phone?
Many thanks in advance
Click to expand...
Click to collapse
Settings-Inteligent Assist-PureBackground
Turn this off for normal background behaviour.... or select by app.
No idea why this is enabled by default.... Developers!, Bah.

dontmailme said:
Settings-Inteligent Assist-PureBackground
Turn this off for normal background behaviour.... or select by app.
No idea why this is enabled by default.... Developers!, Bah.
Click to expand...
Click to collapse
Thank you, I've tried it but without success unfortunately, Profile Scheduler is still not working properly. I'll search for another profile scheduling app...

Zornicka said:
Hi, i have the same problem
Click to expand...
Click to collapse
Since the charger blew up my phone takes 10-11 hours to be fully charged, and the battery drains up unpredictably every now and then. I installed CPU-Z but there was no info on the current draw, so it's very likely that the charge controller is dead already. Did you get the same behavior?

Thanks to all users who reported the charger issue. I have forwarded all reports to the company and they said me the engineering department is looking into it.
Hopefully the new stock of devices will not be shipped with the same charger.

Live wallpaper not found!
Hello, i have a problem with my device, i have latest android upgrade 7.0 version 3.08, live wallpaper missing, i downloaded soo many live wall app but nothing happens,please do something i need assistance, please help me

Can someone link the camera apk? I've uninstalled it by mistake..

Installed TWRP, rooted, rebooted after wiping dalvik/cache and I can't open any apps :/ Ideas?

Hi, thanks very much for the thread and stock rom.
Do you know if any device/kernel tree sources? Thanks

Twrp builder has released twrp 3.2.3 for this device, which also means we now have a partial device tree for twrp

@Alberto96 I am also looking for device/kernel/blob trees for this device so I can (try) to build Lineage for it. Any ideas? Would the manufacturer help out here please?
Is this device similar enough to MAYA to use the device/kernel trees from that as starting point. The camera is very different.
Cheers 8)

Looking for good stock based rom with XZ1/XZs features

Hello Z5 Users,
Bought my Z5 3 days ago and I like this phone so much.So today I installed M-Rom with XZ1 features.All nice but phone even in idle keeps being hot and rom doesn't recognize sim card.Is there similiar rom that doesn't have that problems?
Cheers

Okey guys put this in another way.Has anyone facing with issues on 2.3 version M-Rom like:fingerprint sensor is inaccurate,phone lags when entering into battery settings and my phone is hot where is NFC logo on back of the phone even in idle.
Tried flashing again .54 fw than M-Rom,deleted bloatware from rom and still nothing.
Any help is appreciated by me.

Yanun said:
Okey guys put this in another way.Has anyone facing with issues on 2.3 version M-Rom like:fingerprint sensor is inaccurate,phone lags when entering into battery settings and my phone is hot where is NFC logo on back of the phone even in idle.
Tried flashing again .54 fw than M-Rom,deleted bloatware from rom and still nothing.
Any help is appreciated by me.
Click to expand...
Click to collapse
Hello bro this happened to me quite recently too with simcard problems as i too also got the phone quite recently and installed that rom i have it now working perfectly the only way i could fix it is by wiping the phone totally and installing stock rom. Then i install twrp then install the xz rom. Even though its a long process it works and to fix heat issues and improve battery life which my battery life is perfect download from these links
https://forum.xda-developers.com/xp...d-fsc-1-0-dont-sacrifice-performance-t3670586 by @korom42 now this may slow down your phone a bit but i am running all games with no lag so it isnt a problem for me and i game quite a lot i have installed fsc+ which helps with heat quite drastically especially with this rom, download 2.2 version even though its for stock it also works for non-stock is you read what he says in blue. And also download this https://forum.xda-developers.com/xp...-lxt-xperia-tweaks-legendary-battery-t3676698 also by @korom42 make sure you have rooted with magisk and you need to install busybox install it in system/bin not system/xbin and install kernel auditor and for all settings press apply on boot reply back to me for anything else

Quantumkk123 said:
Hello bro this happened to me quite recently too with simcard problems as i too also got the phone quite recently and installed that rom i have it now working perfectly the only way i could fix it is by wiping the phone totally and installing stock rom. Then i install twrp then install the xz rom. Even though its a long process it works and to fix heat issues and improve battery life which my battery life is perfect download from these links
https://forum.xda-developers.com/xp...d-fsc-1-0-dont-sacrifice-performance-t3670586 by @korom42 now this may slow down your phone a bit but i am running all games with no lag so it isnt a problem for me and i game quite a lot i have installed fsc+ which helps with heat quite drastically especially with this rom, download 2.2 version even though its for stock it also works for non-stock is you read what he says in blue. And also download this https://forum.xda-developers.com/xp...-lxt-xperia-tweaks-legendary-battery-t3676698 also by @korom42 make sure you have rooted with magisk and you need to install busybox install it in system/bin not system/xbin and install kernel auditor and for all settings press apply on boot reply back to me for anything else
Click to expand...
Click to collapse
Thanks bro for reply.I'll try it asap.

Yanun said:
Thanks bro for reply.I'll try it asap.
Click to expand...
Click to collapse
Np

Quantumkk123 said:
Np
Click to expand...
Click to collapse
In flashtool did you picked any options in wipe section and also on the start in aroma which option of wipe did you selected? First or second?

Yanun said:
In flashtool did you picked any options in wipe section and also on the start in aroma which option of wipe did you selected? First or second?
Click to expand...
Click to collapse
second but not sure about the first bro

Does anyone meet the random restart problem?

I am on Oxygen OS 9.5.8.GM21AA. Recently I met the random restart problem. And it become more and more frequent. I have Magisk and EdXposed installed, but I have not update or install new modules recently.
The problem most time happened when I swipe from bottom screen to switch apps. And the whole phone become black. And several seconds later. It will automatically restart. The phone is showing "The phone is restarting" message.
I was tried to disable EdXposed modules one by one, but still not found any incompatible.

einverne said:
I am on Oxygen OS 9.5.8.GM21AA. Recently I met the random restart problem. And it become more and more frequent. I have Magisk and EdXposed installed, but I have not update or install new modules recently.
The problem most time happened when I swipe from bottom screen to switch apps. And the whole phone become black. And several seconds later. It will automatically restart. The phone is showing "The phone is restarting" message.
I was tried to disable EdXposed modules one by one, but still not found any incompatible.
Click to expand...
Click to collapse
Are you using a custom kernel? Updating to 9.5.9 might also help.

harpin14789 said:
Are you using a custom kernel? Updating to 9.5.9 might also help.
Click to expand...
Click to collapse
I am using ElementalX kernel. And i just update this kernel to 1.11, let's me check any problem than.

einverne said:
I am using ElementalX kernel. And i just update this kernel to 1.11, let's me check any problem than.
Click to expand...
Click to collapse
I also have the same issue as you.
This issue is a kernel related issue, oneplus is aware and will push an update in the near future.
As far I know, Fraken kernel is the only that seems to have fixed this issue, so I suggest you flash that, atleast till, OP pushes an update to fix this issue. I have tried all the kernel 7pro and have the issue with every single one. But hvae not the issue in over a week with fraken.
Good Luck!:good: