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[V2][Root][G950U/W]PartCyborgRom - Root for Snapdragon S8 with Custom Rom

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partcyborg

Recognized Developer
Jun 23, 2017
2,543
2,276
SamFail presents...

PartCyborgRom
BQL1


A Rooted Custom Rom

For G950U/W, Bootloader Revisions 1 or 2 only any higher are not currently rootable or vulnerable to this exploit


Updates
New Release and a new OP that I hope is easier to read.
Send feedback or suggestions on improvements to me via pm here or on telegram.


Heads Up
You may notice that the BL version of this release is different than the system rom part.
The rom version is in fact BQL1, but the BL is a new version of AQK2. The reason for this is because
the latest combination, ARA1, has a number of sensors not working. I figured out a fix but it requires splicing
stuff in from other versions, and it didnt feel like the battery lasted as well. I am still testing though and
the next release if its ready will come with ARA1. This is not the same BL as the previous
release though, so if you upgrade also flash this new BL!

Thanks!



Featured Modifications

Deodexed
Deodexed for all devices.
I found a way that works!
It should keep working as long as nougat
(is that a haiku?)

Xposed Preinstalled
PCR now comes out of the flasher with xposed pre-installed!
NOTE: Xposed Installer may crash on first boot. It will not crash after setup finishes and you reboot

New Boot Animation
Another great one from @Ryan-refoua.
This one is my favorite so far.

JamesDSP
I added another DSP style audio mod. JamesDSP is similar to V4A in how it operates and what features it has, but it has some really awesome features that have made me a fan and a regular user. Among other things, it has a better convolver (IRS processing) implementation, and its bass boost is significantly better than v4a. If there are things you like about V4A you can use both at the same time.

ITYBP Modded YouTube
A last minute addition, this is a really nice youtube mod brought to you by @laura almeida, @Razerman and @ZaneZam. It features some cool additions like native adblocking (no more xposed module), overriding your max youtube resolution (you can watch 4k videos on your phone, but not 4k hdr). I have been using it for a while and really like it. A big thanks to them for letting me include it with PCR

Improved Debloating
Found better stuff to delete. Added back some stuff I took out before that some of you asked for.
If you find something missing that you want back, pull it from the stock rom and install it in /system/app or /system/priv-app, wherever you got it from.

Improved Battery Life
Thanks to some battery sleuthing by @TheMadScientist, this release comes with a nice big bump in efficiency. With just some very minor tuning using amplify and a service disabler, I can get around 1%/h drain.

Performance Improvements
That increased battery life does not come at the cost of performance. In fact performance is better too. Part of that is due some personally tested build.prop tweaks. Another part is some data optimisation scripts that now run at boot. You wont notice those, but they are there doing their thing.


Other Features
New for first time flashers
- Pre-Rooted with SuperSU installed
- CSC OYN pre-installed. Tested working on several carriers
- RCS and VoLTE icons removed from status bar.
- High quality audio mods, including
- Viper Audio (V4A)
- Dolby Atmos from the Axon 7
- Pandora hifi audio framework
- Native Google Dialer & Contacts support, including local search, spam call blocking
- Oreo 8.1 Emoji Icon Set
- Custom Lockscreen Clock font
- Stock system display fonts replaced with Apple's original San Francisco Font


Special Thanks
- @ahiron and @Zackptg5 for the killer sounds from V4A and Dolby Atmos Mods!
- The Aiur crew for Pandora (now a legacy mod but works great on the s8)
- @syndre for the Google Dialer and Contacts framework mod
- @rayan-refoua for the beautiful Tech Lines Custom boot and shutdown animations!
- Last but not least, my new friend @laura almeida, along with @Razerman amd @ZaneZam for letting me include the iYTBP - injected YouTube Background Playback Mod
- everyone who tested


Warnings/Disclaimers/Known Issues
- 80% Battery life like every other rooted US snapdragon device
- Flashing on a USB 3.0 port will likely cause corruption in your flash that can cause kernel panics, loss of root, and occasionally very strange other errors. If you get something like this, its not the rom its a hardware conflict that can only show up with larger images like are used in SamFail flashing. See the section below on Kernel Panics for more.
- If there is an app or apk from the stock rom that you wish you had installed, the best solution is to extract it from your stock rom image and copy it to the same place in /system using a root file manager.


SamFail Rooting Process
and Rom Installation


WARNING: THE FOLLOWING WILL ERASE YOUR WHOLE PHONE
If you have a SDCard, remove it from your device. Occasional firmware incidents have wiped SDCards in the past. It has neer happened to me, but I have a backup of my sdcard so I can be a little more risky. Better safe than sorry.

Prepare the Following:
- complete stock rom at your bootloader rev in case things dont work
- Everything backed up
- Both Prince Comsy Odin, and Regular Odin for flashing stock
- A USB 2.0 Port. If you attempt to flash with a USB 3.0 port it may work, but if you get kernel panics, or unexpected bad behavior and/or crashes your usb3 is absolutely to blame. some people get lucky and suceed after a few tries, YMMV. If you can not acquire a machine with a usb2.0 port, get a usb2.0 hub and run your phone into that & that into your machine. Reports are that has made things work for some, but we get few reports back.


What is my Bootloader Revision?
Your bootloader revision is part of the baseband build number of the firmware you are currently running. Lets use this rom as our example. The full build number is as follows: G950USQS2BQL1
Start from the right and count 5 characters back. See that 2? That is the bootloader revision for the firmware that came with this rom. But we are not flashing the BQL1 firmware (or Baseband), We are using an older version because it works better. The version we are flashing is: G950UEU2AQK2. Can you tell which revision it is?


Is my Phone Compatible?
Is it a G950U? Is it a G950W? If you answered "yes" to one of those questions, then the answer is "yes". That being said, flashing this rom if you are on bootloader revision 1 will upgrade your bootloader revision to 2, which means that any previous rom you were running wont work, so be prepared by having a copy of stock for bootloader version 2. If you don't want to move to version 2, you can still run the latest PartCyborgRom though, just use the G950UEU1AQk1 BL_ tar under Old Downloads in place of the one that came with this one. It will work just fine. However if you are unsure I suggest you go ahead and upgrade, there are not really any benefits to staying on 1 at this point.




Steps to Root

1) Download and unzip AP Part 1 and BL Part 2 zip files.

2) Download and unzip Prince Comsey Odin and start it up

3) Reboot device into Download mode and connect it to your pc

4) Open Comsy Odin and only add the AP Part1.tar.md5 file. Select only the following options:
- "Auto-Reboot"
- "F-Reset Time"
- "Nand Erase All"

NOTE: Odin will freeze while checking the AP tar.md5 hash.
Be patient, it will come back. If your computer is old this will take even longer.

5) Click "Start" and wait for the system.img.ext4 file to flash fully to your device. This will take a while too.

ATTENTION
When the flash finishes, this is when the SamFail magic happens. Instead of saying "Failed (Auth)" like it should, the device will crash into upload mode with "Unknow Error".

If your device does not do this, and just says "Failed (Auth)" or something similar and stays in download mode, you need to start again from the beginning, but using a different set of usb ports as you have suffered from the usb3 corruption.

When you see the upload mode page, do the 3 button salute to reboot into download mode again.

WARNING: When you reboot from upload mode, it wont look like download mode. You will see an error.

When you reboot back into download mode, your screen will say that you had a failed update and you need to do emergency repair or take your device to a service center.
Rest assured, your phone is actually in download mode, and Odin will have recognized it and said "Added!" along with the com port lighting up underneath the progress bar. Just continue the process. It is safe to do so and that error will go away after the next step.

6) Close and re-open Comsy Odin or hit the reset button, and add BL_PartCyborgRom-BootLoopEdition-<version>.tar.md5 to the BL section.

7) Leave the default checkboxes for "F Reset Time" and "Auto Reboot" checked. Uncheck "Nand erase all". Click "Start" and flash the BL (part 2) to your device.

Note: If you forgot to uncheck nand erase all, don't worry. You are just wasting time doing something again that you already did, the outcome is the same. "All" in "Nand Erase All" means "all userdata", which means cache and, well, userdata. Nothing else is deleted.

8) Wait for the flash to finish . It won't take very long at all as the files are small.

9) When it has finished, Odin will say PASS and your device will reboot into recovery.
From this point forther the scary download error message will be gone for good (or until next flash). Don't go looking yet though, you have more work to do to get root.

Warning: Failure to follow this step could lead to a corrupted instance with no cell coverrage

10) When in recovery issue a factory reset. This ensures that your device has a userdata and cache partitions that are valid, and that the csc is processed correctly. Failure to do the reset could cause issues with either.

11) Boot the device as normal. Wait for it to come up. Its deodexed so it will take longer than even your average odexed rom.

All done!


FlashFire Instructions


- Get the ROM on your phone and unzip it
- Open up FlashFire
- Add a Wipe task, select the top 3 items only
- Select Flash Firmware and load up the AP_PartCyborgRom-BootLoopEdition-<version>.Part1.tar.md5 file to flash your new system
- Select Reboot to Recovery
- Make sure "Inject Root" is NOT checked
- Press go. Wait for the rom to flash and your device to reboot into recovery
- From recovery do a factory reset
- Then select reboot to Download Mode
- When device reboots into Download mode, flash BL_PartCyborgRom-BootLoopEdition-<version>.Part2.tar.md5

You have to use odin for the BL file because flashing bootloaders in FlashFire is a bad idea.



Dirty Flashers


Yes, you can dirty flash this rom to upgrade, however it is problematic and can cause issues. I did it for a long time, but my install was a mess by the time I gave up and reset.
To dirty flash, follow your preferred method of flashing above, but skip the Wipe step.

Odin
Skip "Nand Erase All" during the Part 1 flash. Do everything else the same

FlashFire
For the first Wipe task, instead of selecting the top 3, select only Dalvik like the second wipe task.

NOTE: This procedure is ONLY for people upgrading from an earlier PartCyborgRom version. If you are coming from stock you can not dirty flash because you userdata is encrypted which is not supported by the Factory firmware. If you are coming from other rom, or stock, I have no idea man but don't look at me if it blows up.

ANOTHER NOTE: This method of flashing is unsupported! If you do this and you have issues, you are on your own. If you think they are the rom, then back up your entire rom, wipe and reproduce them.



Help! I Got a Boot loop!
If you get a boot loop or your device hangs at boot, try the following:

1) Reboot to recovery and factory reset again.
To get to recovery hold power+vol-down until screen goes black, then wait till upload mode (press power key for 7+ secs) comes up. Then press vol-down+power again and hold it till it reboots and as SOON as the screen goes black switch to holding vol-up+power+bixby. Hold it for 5-7sec then let go and you will wind up in recovery mode. If this doesnt help, or you can't get to recovery because you cant press the buttons right, proceed to the next step.
2) Try flashing just Part 2 (the BL) again. not only will this get you back in recovery, it will also format your cache again. Its worth a shot and doesnt take long.

Kernel Panic, Invalid Argument

Start Over
Go back to the beginning and do everything again. If it fails again, even in a slightly different way this time, bad interaction between the s8 and your USB port/controller/cable/etc are causing the image to be corrupted as its being written to disk. Try the following:

1) New USB Ports. If you have them, use a different set of usb ports (not the one next to it, but one further away). Its possible that that will be your "good" port, and that will be enough. Lots of machines also have some USB3 ports and some USB2.
2) New Cable. Its less likely, but maybe a new cable will help. Do the whole thing over with a new cable.
3) Try a few times. It sounds silly, but people who have had this issue have reported that eventually it just works. Try a few times until you get sick of trying. If you try like 10 times it probably wont work on the 11th though.

I Dont Have Another USB Port!
Try to borrow your partner/spouse/roommate/friends computer for a quick flash. Ask about the USB ports though, because another 3.0 port may not help you.
If you can't get someones computer, you can purchase a USB2.0 Hub online or at your friendly neighborhood electronics store. They arent very expensive, and I have heard positive reports from people saying it did the trick.


None of that Worked! I'm Screwed!
No you probably arent. I can count on one hand the number of people who someone couldnt get this working eventually. Some of us will be here to help. Check out our telegram channel, where people will be around that can help you. Its right here!.



And they all rooted happily ever after.
The End.


XDA:DevDB Information
PartCyborgRom, ROM for the Samsung Galaxy S8

Contributors
partcyborg
ROM OS Version: 7.x Nougat
ROM Kernel: Linux 4.x
Based On: TouchWiz/Samsung Experience

Version Information
Status: Stable
Current Stable Version: BQL1
Stable Release Date: 2017-12-10

Created 2017-12-11
Last Updated 2018-2-10
 
Last edited by a moderator:

adj998

Senior Member
Flashed fine through flashfire(AP only) was a bit worried because after I flashed the bootloader I got a kernel panic upload mode, but I reflashed the bootloader and it worked out fine. Running it for a few hours now and I noticed right away the difference in battery drain, as in, amazing job at extending the battery life. Thanks for your work, look forward to Future updates :good:

Update: only bug I've found is auto rotate doesn't really work, and internet connection issues(might be my network)
 
Last edited:
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reggie cheeks

Senior Member
May 5, 2011
1,778
2,689
Lake Tapps
I'm new to SIM unlocked and haven't rooted since s4 so possible newb question but
Can I use this rom to root unrooted AQH3?
I'm on sim-unlocked G950U.
Thanks for any help.

Sent from my SM-G950U1 using Tapatalk
 

OMEGAHORSE

Member
Nov 10, 2017
6
0
Followed everything and when it went to go reboot the SAMSUNG GALAXY S8 logo popped with the little custom lock but its almost as if its just there like its not really rebooting just a screenshot of it it wont go away after a certain time period or anything,I also tried re-flashing the BL and it still didn't boot up as it should of. Any idea on what I should do?
 
Aug 3, 2017
16
4
Followed everything and when it went to go reboot the SAMSUNG GALAXY S8 logo popped with the little custom lock but its almost as if its just there like its not really rebooting just a screenshot of it it wont go away after a certain time period or anything,I also tried re-flashing the BL and it still didn't boot up as it should of. Any idea on what I should do?

Same here.
 

vboyz103

Senior Member
Apr 9, 2006
878
136
First attempt without flashing CSC on TMo resulted in Kernel Panic after reboot from Download mode. I ended up flashing the CSC and now the Tmobile boot splash is showing up and seems to be working, will update to confirm in a few minutes.

Update: booted just fine now into Setup Wizard...
 
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thejackalsmark

Senior Member
Jul 12, 2010
321
202
@partcyborg.

So... I just got an S8 from Boost Mobile after my LG Optimus f7 started FINALLY failing. Had it rooted and cwm thanks to the genius and hard work of devs like GameTheory and PlayfulGod!

1. Should it be safe to use this method and flash this particular ROM?

2. Do I need to do anything special because it's Boost n not vzw?

3. It was mentioned that in spite of 80% battery issue, battery life is extremely well optimised. Anyone else with S8 on Boost try this? Worth it to take the plunge?

Don't care about Knox, Safety Net, etc. I don't use my device for transactions via Samsung/Android Pay, nor Gaming. Wondering if this will nix Playstore purchases via credit card on file? NOT a deal beaker by any means. Just curious.

I desperately miss having root and custom recovery. siiiiiigggghhhh...

Anyway, Thanks for any info and THANK YOU @partcyborg for all the time and hard work you've put into trying to help us get the most out of these phones!

This is my first $700 phone and I'll probably have her as long as I did my f7. ( as log as battery doesn't die or I can have it replaced at a repair shop when the time comes, for less than a fortune. lol)

Attached is a screen of my phone's specs if it helps.

Thanks again,
- TheJackalsMARK
 

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adj998

Senior Member
@partcyborg.

So... I just got an S8 from Boost Mobile after my LG Optimus f7 started FINALLY failing. Had it rooted and cwm thanks to the genius and hard work of devs like GameTheory and PlayfulGod!

1. Should it be safe to use this method and flash this particular ROM?

2. Do I need to do anything special because it's Boost n not vzw?

3. It was mentioned that in spite of 80% battery issue, battery life is extremely well optimised. Anyone else with S8 on Boost try this? Worth it to take the plunge?

Don't care about Knox, Safety Net, etc. I don't use my device for transactions via Samsung/Android Pay, nor Gaming. Wondering if this will nix Playstore purchases via credit card on file? NOT a deal beaker by any means. Just curious.

I desperately miss having root and custom recovery. siiiiiigggghhhh...

Anyway, Thanks for any info and THANK YOU @partcyborg for all the time and hard work you've put into trying to help us get the most out of these phones!

This is my first $700 phone and I'll probably have her as long as I did my f7. ( as log as battery doesn't die or I can have it replaced at a repair shop when the time comes, for less than a fortune. lol)

Attached is a screen of my phone's specs if it helps.

Thanks again,
- TheJackalsMARK

This is about all we have as far as ROMs go. We don't have a custom recovery because our bootloader is locked and it's not looking like it's going to be unlocked ever. You can flash this on any G950U phone, carrier doesn't matter.
 
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partcyborg

Recognized Developer
Jun 23, 2017
2,543
2,276
@partcyborg.

So... I just got an S8 from Boost Mobile after my LG Optimus f7 started FINALLY failing. Had it rooted and cwm thanks to the genius and hard work of devs like GameTheory and PlayfulGod!

1. Should it be safe to use this method and flash this particular ROM?

2. Do I need to do anything special because it's Boost n not vzw?

3. It was mentioned that in spite of 80% battery issue, battery life is extremely well optimised. Anyone else with S8 on Boost try this? Worth it to take the plunge?

Don't care about Knox, Safety Net, etc. I don't use my device for transactions via Samsung/Android Pay, nor Gaming. Wondering if this will nix Playstore purchases via credit card on file? NOT a deal beaker by any means. Just curious.

I desperately miss having root and custom recovery. siiiiiigggghhhh...

Anyway, Thanks for any info and THANK YOU @partcyborg for all the time and hard work you've put into trying to help us get the most out of these phones!

This is my first $700 phone and I'll probably have her as long as I did my f7. ( as log as battery doesn't die or I can have it replaced at a repair shop when the time comes, for less than a fortune. lol)

Attached is a screen of my phone's specs if it helps.

Thanks again,
- TheJackalsMARK

I'm happy enough with the battery. Bonus is that you won't wear it out charging to 80% only apparently.

It's a multi CSC so you should be fine on boost. I can't test it though I only have VZW. Worst case flash the CSC but only do that if it fails to boot.
 

thejackalsmark

Senior Member
Jul 12, 2010
321
202
This is about all we have as far as ROMs go. We don't have a custom recovery because our bootloader is locked and it's not looking like it's going to be unlocked ever. You can flash this on any G950U phone, carrier doesn't matter.

Yeah, Bootloader's a major buzzkill.

Root and decent custom ROM would be a nice consolation prize.

What's your take on the battery afterwards? I practically live on my phone and with not being able to swap batteries, a major hit to battery life is pretty much a deal breaker. BTW, thx for the quick reply!

- TheJackalsMARK

Sent from my Samsung SM-G950U using XDA Labs
 

partcyborg

Recognized Developer
Jun 23, 2017
2,543
2,276
I'm new to SIM unlocked and haven't rooted since s4 so possible newb question but
Can I use this rom to root unrooted AQH3?
I'm on sim-unlocked G950U.
Thanks for any help.

Sent from my SM-G950U1 using Tapatalk

No but you can install rooted aqi6 with it. This literally flashes /system and replaces what you have installed. I find aqi6 much improved TBH
 

partcyborg

Recognized Developer
Jun 23, 2017
2,543
2,276
Followed everything and when it went to go reboot the SAMSUNG GALAXY S8 logo popped with the little custom lock but its almost as if its just there like its not really rebooting just a screenshot of it it wont go away after a certain time period or anything,I also tried re-flashing the BL and it still didn't boot up as it should of. Any idea on what I should do?


Factory reset. Sorry I should have mentioned that in the op. I will update
 
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thejackalsmark

Senior Member
Jul 12, 2010
321
202
I'm happy enough with the battery. Bonus is that you won't wear it out charging to 80% only apparently.

It's a multi CSC so you should be fine on boost. I can't test it though I only have VZW. Worst case flash the CSC but only do that if it fails to boot.


Thx, man!
And Great Work, again, on this!

- TheJackalsMARK

Sent from my Samsung SM-G950U using XDA Labs
 

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  • 68
    SamFail presents...

    PartCyborgRom
    BQL1


    A Rooted Custom Rom

    For G950U/W, Bootloader Revisions 1 or 2 only any higher are not currently rootable or vulnerable to this exploit


    Updates
    New Release and a new OP that I hope is easier to read.
    Send feedback or suggestions on improvements to me via pm here or on telegram.


    Heads Up
    You may notice that the BL version of this release is different than the system rom part.
    The rom version is in fact BQL1, but the BL is a new version of AQK2. The reason for this is because
    the latest combination, ARA1, has a number of sensors not working. I figured out a fix but it requires splicing
    stuff in from other versions, and it didnt feel like the battery lasted as well. I am still testing though and
    the next release if its ready will come with ARA1. This is not the same BL as the previous
    release though, so if you upgrade also flash this new BL!

    Thanks!



    Featured Modifications

    Deodexed
    Deodexed for all devices.
    I found a way that works!
    It should keep working as long as nougat
    (is that a haiku?)

    Xposed Preinstalled
    PCR now comes out of the flasher with xposed pre-installed!
    NOTE: Xposed Installer may crash on first boot. It will not crash after setup finishes and you reboot

    New Boot Animation
    Another great one from @Ryan-refoua.
    This one is my favorite so far.

    JamesDSP
    I added another DSP style audio mod. JamesDSP is similar to V4A in how it operates and what features it has, but it has some really awesome features that have made me a fan and a regular user. Among other things, it has a better convolver (IRS processing) implementation, and its bass boost is significantly better than v4a. If there are things you like about V4A you can use both at the same time.

    ITYBP Modded YouTube
    A last minute addition, this is a really nice youtube mod brought to you by @laura almeida, @Razerman and @ZaneZam. It features some cool additions like native adblocking (no more xposed module), overriding your max youtube resolution (you can watch 4k videos on your phone, but not 4k hdr). I have been using it for a while and really like it. A big thanks to them for letting me include it with PCR

    Improved Debloating
    Found better stuff to delete. Added back some stuff I took out before that some of you asked for.
    If you find something missing that you want back, pull it from the stock rom and install it in /system/app or /system/priv-app, wherever you got it from.

    Improved Battery Life
    Thanks to some battery sleuthing by @TheMadScientist, this release comes with a nice big bump in efficiency. With just some very minor tuning using amplify and a service disabler, I can get around 1%/h drain.

    Performance Improvements
    That increased battery life does not come at the cost of performance. In fact performance is better too. Part of that is due some personally tested build.prop tweaks. Another part is some data optimisation scripts that now run at boot. You wont notice those, but they are there doing their thing.


    Other Features
    New for first time flashers
    - Pre-Rooted with SuperSU installed
    - CSC OYN pre-installed. Tested working on several carriers
    - RCS and VoLTE icons removed from status bar.
    - High quality audio mods, including
    - Viper Audio (V4A)
    - Dolby Atmos from the Axon 7
    - Pandora hifi audio framework
    - Native Google Dialer & Contacts support, including local search, spam call blocking
    - Oreo 8.1 Emoji Icon Set
    - Custom Lockscreen Clock font
    - Stock system display fonts replaced with Apple's original San Francisco Font


    Special Thanks
    - @ahiron and @Zackptg5 for the killer sounds from V4A and Dolby Atmos Mods!
    - The Aiur crew for Pandora (now a legacy mod but works great on the s8)
    - @syndre for the Google Dialer and Contacts framework mod
    - @rayan-refoua for the beautiful Tech Lines Custom boot and shutdown animations!
    - Last but not least, my new friend @laura almeida, along with @Razerman amd @ZaneZam for letting me include the iYTBP - injected YouTube Background Playback Mod
    - everyone who tested


    Warnings/Disclaimers/Known Issues
    - 80% Battery life like every other rooted US snapdragon device
    - Flashing on a USB 3.0 port will likely cause corruption in your flash that can cause kernel panics, loss of root, and occasionally very strange other errors. If you get something like this, its not the rom its a hardware conflict that can only show up with larger images like are used in SamFail flashing. See the section below on Kernel Panics for more.
    - If there is an app or apk from the stock rom that you wish you had installed, the best solution is to extract it from your stock rom image and copy it to the same place in /system using a root file manager.


    SamFail Rooting Process
    and Rom Installation


    WARNING: THE FOLLOWING WILL ERASE YOUR WHOLE PHONE
    If you have a SDCard, remove it from your device. Occasional firmware incidents have wiped SDCards in the past. It has neer happened to me, but I have a backup of my sdcard so I can be a little more risky. Better safe than sorry.

    Prepare the Following:
    - complete stock rom at your bootloader rev in case things dont work
    - Everything backed up
    - Both Prince Comsy Odin, and Regular Odin for flashing stock
    - A USB 2.0 Port. If you attempt to flash with a USB 3.0 port it may work, but if you get kernel panics, or unexpected bad behavior and/or crashes your usb3 is absolutely to blame. some people get lucky and suceed after a few tries, YMMV. If you can not acquire a machine with a usb2.0 port, get a usb2.0 hub and run your phone into that & that into your machine. Reports are that has made things work for some, but we get few reports back.


    What is my Bootloader Revision?
    Your bootloader revision is part of the baseband build number of the firmware you are currently running. Lets use this rom as our example. The full build number is as follows: G950USQS2BQL1
    Start from the right and count 5 characters back. See that 2? That is the bootloader revision for the firmware that came with this rom. But we are not flashing the BQL1 firmware (or Baseband), We are using an older version because it works better. The version we are flashing is: G950UEU2AQK2. Can you tell which revision it is?


    Is my Phone Compatible?
    Is it a G950U? Is it a G950W? If you answered "yes" to one of those questions, then the answer is "yes". That being said, flashing this rom if you are on bootloader revision 1 will upgrade your bootloader revision to 2, which means that any previous rom you were running wont work, so be prepared by having a copy of stock for bootloader version 2. If you don't want to move to version 2, you can still run the latest PartCyborgRom though, just use the G950UEU1AQk1 BL_ tar under Old Downloads in place of the one that came with this one. It will work just fine. However if you are unsure I suggest you go ahead and upgrade, there are not really any benefits to staying on 1 at this point.




    Steps to Root

    1) Download and unzip AP Part 1 and BL Part 2 zip files.

    2) Download and unzip Prince Comsey Odin and start it up

    3) Reboot device into Download mode and connect it to your pc

    4) Open Comsy Odin and only add the AP Part1.tar.md5 file. Select only the following options:
    - "Auto-Reboot"
    - "F-Reset Time"
    - "Nand Erase All"

    NOTE: Odin will freeze while checking the AP tar.md5 hash.
    Be patient, it will come back. If your computer is old this will take even longer.

    5) Click "Start" and wait for the system.img.ext4 file to flash fully to your device. This will take a while too.

    ATTENTION
    When the flash finishes, this is when the SamFail magic happens. Instead of saying "Failed (Auth)" like it should, the device will crash into upload mode with "Unknow Error".

    If your device does not do this, and just says "Failed (Auth)" or something similar and stays in download mode, you need to start again from the beginning, but using a different set of usb ports as you have suffered from the usb3 corruption.

    When you see the upload mode page, do the 3 button salute to reboot into download mode again.

    WARNING: When you reboot from upload mode, it wont look like download mode. You will see an error.

    When you reboot back into download mode, your screen will say that you had a failed update and you need to do emergency repair or take your device to a service center.
    Rest assured, your phone is actually in download mode, and Odin will have recognized it and said "Added!" along with the com port lighting up underneath the progress bar. Just continue the process. It is safe to do so and that error will go away after the next step.

    6) Close and re-open Comsy Odin or hit the reset button, and add BL_PartCyborgRom-BootLoopEdition-<version>.tar.md5 to the BL section.

    7) Leave the default checkboxes for "F Reset Time" and "Auto Reboot" checked. Uncheck "Nand erase all". Click "Start" and flash the BL (part 2) to your device.

    Note: If you forgot to uncheck nand erase all, don't worry. You are just wasting time doing something again that you already did, the outcome is the same. "All" in "Nand Erase All" means "all userdata", which means cache and, well, userdata. Nothing else is deleted.

    8) Wait for the flash to finish . It won't take very long at all as the files are small.

    9) When it has finished, Odin will say PASS and your device will reboot into recovery.
    From this point forther the scary download error message will be gone for good (or until next flash). Don't go looking yet though, you have more work to do to get root.

    Warning: Failure to follow this step could lead to a corrupted instance with no cell coverrage

    10) When in recovery issue a factory reset. This ensures that your device has a userdata and cache partitions that are valid, and that the csc is processed correctly. Failure to do the reset could cause issues with either.

    11) Boot the device as normal. Wait for it to come up. Its deodexed so it will take longer than even your average odexed rom.

    All done!


    FlashFire Instructions


    - Get the ROM on your phone and unzip it
    - Open up FlashFire
    - Add a Wipe task, select the top 3 items only
    - Select Flash Firmware and load up the AP_PartCyborgRom-BootLoopEdition-<version>.Part1.tar.md5 file to flash your new system
    - Select Reboot to Recovery
    - Make sure "Inject Root" is NOT checked
    - Press go. Wait for the rom to flash and your device to reboot into recovery
    - From recovery do a factory reset
    - Then select reboot to Download Mode
    - When device reboots into Download mode, flash BL_PartCyborgRom-BootLoopEdition-<version>.Part2.tar.md5

    You have to use odin for the BL file because flashing bootloaders in FlashFire is a bad idea.



    Dirty Flashers


    Yes, you can dirty flash this rom to upgrade, however it is problematic and can cause issues. I did it for a long time, but my install was a mess by the time I gave up and reset.
    To dirty flash, follow your preferred method of flashing above, but skip the Wipe step.

    Odin
    Skip "Nand Erase All" during the Part 1 flash. Do everything else the same

    FlashFire
    For the first Wipe task, instead of selecting the top 3, select only Dalvik like the second wipe task.

    NOTE: This procedure is ONLY for people upgrading from an earlier PartCyborgRom version. If you are coming from stock you can not dirty flash because you userdata is encrypted which is not supported by the Factory firmware. If you are coming from other rom, or stock, I have no idea man but don't look at me if it blows up.

    ANOTHER NOTE: This method of flashing is unsupported! If you do this and you have issues, you are on your own. If you think they are the rom, then back up your entire rom, wipe and reproduce them.



    Help! I Got a Boot loop!
    If you get a boot loop or your device hangs at boot, try the following:

    1) Reboot to recovery and factory reset again.
    To get to recovery hold power+vol-down until screen goes black, then wait till upload mode (press power key for 7+ secs) comes up. Then press vol-down+power again and hold it till it reboots and as SOON as the screen goes black switch to holding vol-up+power+bixby. Hold it for 5-7sec then let go and you will wind up in recovery mode. If this doesnt help, or you can't get to recovery because you cant press the buttons right, proceed to the next step.
    2) Try flashing just Part 2 (the BL) again. not only will this get you back in recovery, it will also format your cache again. Its worth a shot and doesnt take long.

    Kernel Panic, Invalid Argument

    Start Over
    Go back to the beginning and do everything again. If it fails again, even in a slightly different way this time, bad interaction between the s8 and your USB port/controller/cable/etc are causing the image to be corrupted as its being written to disk. Try the following:

    1) New USB Ports. If you have them, use a different set of usb ports (not the one next to it, but one further away). Its possible that that will be your "good" port, and that will be enough. Lots of machines also have some USB3 ports and some USB2.
    2) New Cable. Its less likely, but maybe a new cable will help. Do the whole thing over with a new cable.
    3) Try a few times. It sounds silly, but people who have had this issue have reported that eventually it just works. Try a few times until you get sick of trying. If you try like 10 times it probably wont work on the 11th though.

    I Dont Have Another USB Port!
    Try to borrow your partner/spouse/roommate/friends computer for a quick flash. Ask about the USB ports though, because another 3.0 port may not help you.
    If you can't get someones computer, you can purchase a USB2.0 Hub online or at your friendly neighborhood electronics store. They arent very expensive, and I have heard positive reports from people saying it did the trick.


    None of that Worked! I'm Screwed!
    No you probably arent. I can count on one hand the number of people who someone couldnt get this working eventually. Some of us will be here to help. Check out our telegram channel, where people will be around that can help you. Its right here!.



    And they all rooted happily ever after.
    The End.


    XDA:DevDB Information
    PartCyborgRom, ROM for the Samsung Galaxy S8

    Contributors
    partcyborg
    ROM OS Version: 7.x Nougat
    ROM Kernel: Linux 4.x
    Based On: TouchWiz/Samsung Experience

    Version Information
    Status: Stable
    Current Stable Version: BQL1
    Stable Release Date: 2017-12-10

    Created 2017-12-11
    Last Updated 2018-2-10
    9
    After using this ROM for more than a week now, except for battery, I start liking this ROM and want to continue using it for some time. But now Oreo update coming up and don't want to miss out of Oreo. Is there any plan to upgrade this ROM to Oreo in near future? Generally we used to be ahead with custom ROM, this will be first time, I will be behind stock.

    I will likely release an oreo rom once it is possible to root these devices and run it
    8
    UPDATE:


    I promised you all an update this past weekend (and hinted at a possible rom), so here it is...

    I've been having massive computer trouble. Either my machine or my kitchen is occasionally silently corrupting my ROMs while they are in process. I spent all night on Friday and all night last night, but I Finally nailed it down to the filesystem create in my kitchen (superr's), or sometimes writing the system files to my ssd leaves them and the filesystem corrupted. It finally became apparent enough when my laptop stopped being able to generate a mountable system image. Unfortunately the type of error like this is weird as **** and VERY random. Hardware failures are like quantum ****ing computing, they will dissappear and/or change on you when you go looking for them.

    After a loooong night of fighting tooth and nail with the ghost in my machine, I finally was able to coax a 3/4 baked aqk3 rom out of it on my s8! Unfortunately it was just in time to start getting ready for work (lol) so I didn't get any farther than that. I sorta monkeypatched the rest of the rom together at work today and it's now running pretty solid despite not being fully debloated and having some questionable selinux contexts

    Anyway I'm rambling again the point is I think I can work around the laptop issue until I figure out wtf is going on (and hopefully get a new laptop from work) and be able to actually build the rom on device which will mean I can still do the s8+. I'm going to try to get as much as I can tonight before I faceplant into my keyboard from exhaustion lol. Maybe, MAYBE I can get a s8 rom out tonight but I don't want to rush it and sacrifice quality. That would mean denying my partial cyborg self and we can't have that...


    Oh yeah, the folks over on the n8 thread have officially rooted a n8 running the U2 firmware. This is very good news as it might mean that Sammy failed AGAIN at fixing this root! I'm not calling it battle over just yet though as I personally frequently get stuck unable to boot when running the G95OUSQU1AQK1 primary bootloader with a message I've never seen before and it happens after flashing with SamFail. That being said my **** is so ****ed up right now I don't trust any of it. I will likely need a tester who already has a U2 firmware installed when the time comes so if you mess up and prematurely flash don't ragequit you can still help the cause and maybe you'll get lucky.


    Ok back to work with me. More later tonight, cross your fingers and prey to the bootloader gods for good root fortune ?