Nexus 5X bootloop of death fix (BLOD) | 7/30 Huge performance update!

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Sereseli97

Member
Aug 30, 2015
31
3
Hi! Opinions about disabling the BIG cores for avoiding BLOD are different. But I can understand what you're talking about since I live in Argentina. I can tell you that I disabled BIG cores with kernel manager at first, but then flashed osm0sis' ZIP (https://forum.xda-developers.com/nexus-5x/general/tool-bootloop-death-blod-workaround-t3819497) because BIG core would turn on with no apparent reason when disabled with a KM. I bought my N5X in December 2016 and it's still alive and kicking, working with only the four little cores. Good luck!
Thank you, I'm glad to hear people with their phones lasting :) I'll do that tomorrow or this week to make my phone last more; is there any difference between this patch and osm0sis's one?
 

nirogu325

Senior Member
Oct 15, 2010
3,739
1,938
To all the guys that have problem with the fix i've used this https://forum.xda-developers.com/nexus-5x/general/blod-8-1-0-opm2-171019-029-apr-2018-fix-t3784307 on mine 8.10 november 5th patch and all is working, wifi too! Sometimes it reboot itselft but not stuck... if there will be some better fix will be very good!
You just suggested a deprecated fix. The only universal fix that automatically patches everything necessary is the osm0sis' fix. Look for his thread in this General section. You won't need anything else.
 

hyuma

Member
Mar 30, 2019
5
0
You just suggested a deprecated fix. The only universal fix that automatically patches everything necessary is the osm0sis' fix. Look for his thread in this General section. You won't need anything else.

you mean this?

"N5X-6P_BLOD_Workaround_Injector_Addon-AK2-signed"

I tried a lot with that, but i got stuck during boot animation and can't finish the boot, you know why? If you have suggestion will be appreciated! thanks
 

nirogu325

Senior Member
Oct 15, 2010
3,739
1,938
you mean this?

"N5X-6P_BLOD_Workaround_Injector_Addon-AK2-signed"

I tried a lot with that, but i got stuck during boot animation and can't finish the boot, you know why? If you have suggestion will be appreciated! thanks
Yes. The one in osm0sis' thread. Did you follow his instructions very closely? You only need to flash that file after everything else. Always the last one to flash.
 

hyuma

Member
Mar 30, 2019
5
0
Yes. The one in osm0sis' thread. Did you follow his instructions very closely? You only need to flash that file after everything else. Always the last one to flash.

:good: Yes i've installed the "bullhead-opm7.181105.004-factory-37df0288" using the the Windows file inside the folder "flash-all.bat". After that i TWRP in and applied that patch... (the version i have is TWRP 3.2.1.0-FBE and stuck in the animation boot..
 

nirogu325

Senior Member
Oct 15, 2010
3,739
1,938
:good: Yes i've installed the "bullhead-opm7.181105.004-factory-37df0288" using the the Windows file inside the folder "flash-all.bat". After that i TWRP in and applied that patch... (the version i have is TWRP 3.2.1.0-FBE and stuck in the animation boot..
I'm not familiar with that specific version of TWRP, sorry. I use the official
twrp-3.2.3-0-bullhead.img. I suggest you post your issue in the osm0sis thread because it's more active than this one.
 

Gibson295

Member
Apr 25, 2019
14
0
I am having issues applying this fix to my Nexus 5X
I Had to Freeze my phone to get it to Finally Boot into the OS witch i did not expect
then i managed to enable OEM in the developer before it died
but when i go in and type Fastboot flashing unlock in the Command promp all i get is < waiting for device > nothing happens
Also get the same thing when trying to Flash the 4coreOreo file.

Can anyone assit me, ty :)
 

Tabs78

Senior Member
Dec 8, 2007
650
25
Hi.
I used the fix but After my PC can not see the phone.
Into recovery It see It.
I tried to change cable, PC, drivers but doesn't work

Inviato dal mio Nexus 5X utilizzando Tapatalk
 

waheisel

New member
Jun 9, 2019
2
0
No more downloads?

Thanks for the post. I am to the point where I download and flash to my Nexus 5x. But there are no downloads available currently? I am most interested in the 47Z, 7.1.2 firmware download. Can anyone help?
 

nirogu325

Senior Member
Oct 15, 2010
3,739
1,938

mahyarmo

Senior Member
Jan 8, 2011
73
6
Tehran
Hi guys, I want to share my experience with you.
About two years ago my Nexus 5x got bootloop and I used this 4Cores kernel to boot up my phone again. Hopefully my phone worked for one more year and then some day at the morning I tried to turn my phone on but it just blinking red LED and nothing happened.
I tried to repair it by changing battery, charging overnight, and so on but none of them worked.
So I put my phone some where and bought a new phone...
But today after I saw box of my phone I thought that I is not bad to give it a try again, so I detached my phone's board and warm it with hair dryer at both sides every where of the board. I start from 1 minute and tried 4 times, the last time was about 4 min.
Surprise!!!
It booted to Google logo then reboots...
I tried to flash stock factory imag e with nexus toolkit and put in on soft bricked mode.
It helped and now everything is fine !!! :)
I must see how much does it last in this situation. I thought I would underclock cpu due to not getting warm again.
Thanks for your time, I want to share it with you. :cowboy:
 

quera

Senior Member
Dec 10, 2011
231
29
Hi guys, I want to share my experience with you.
About two years ago my Nexus 5x got bootloop and I used this 4Cores kernel to boot up my phone again. Hopefully my phone worked for one more year and then some day at the morning I tried to turn my phone on but it just blinking red LED and nothing happened.
I tried to repair it by changing battery, charging overnight, and so on but none of them worked.
So I put my phone some where and bought a new phone...
But today after I saw box of my phone I thought that I is not bad to give it a try again, so I detached my phone's board and warm it with hair dryer at both sides every where of the board. I start from 1 minute and tried 4 times, the last time was about 4 min.
Surprise!!!
It booted to Google logo then reboots...
I tried to flash stock factory imag e with nexus toolkit and put in on soft bricked mode.
It helped and now everything is fine !!! :)
I must see how much does it last in this situation. I thought I would underclock cpu due to not getting warm again.
Thanks for your time, I want to share it with you. :cowboy:

Which combination of firmware version and boot.img are you currently using?
 

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  • 239
    Read First: This method is relatively drastic, and will hurt device performance some. You should only use this as a last resort, if the more basic methods of fixing a soft brick didn't work (e.g, factory reset, flash stock firmware, etc.)​

    *Update 7/30: On my 6P, I found that the original kernel with this mod was using pretty much 1.5 cores, instead of all 4. People with the 5X were also reporting this, so I modified the images to utilize all 4 cores better. It helps performance a lot (able to beat stock 6P in some Antutu marks now, and play intensive games), try it out if you haven't yet!

    *Petition:
    I made a petition for Google to officially release and sign modified boot.imgs, so that people with locked bootloaders can fix their devices too. Check it out here. (I apologize for dumbing it down so much, I wanted to make sure everyone could understand it)

    *Changelog:

    • 8/26 - EX kernel for Android O uploaded.
    • 8/22 - Android O working, boot.img and source uploaded.
    • 8/08, 2nd Change - Added boot.img for 48C firmware (August security patch).
    • 8/08 - Updated EX kernel to version 4.1.2. This updated zip adds the CPU utilization patch to the init.elemntalx.rc, instead of removing the old init.angler.rc and copying the new init over. That should mean more compatibility with Roms/kernels that modify the init.angler.rc. I also modified the camera-daemon to use cpus 0-3 instead of 0-2, so hopefully this should make the a camera bit faster too.
    • 8/07 - Added boot.img for 1 core, just to see if it would work for devices that didn't work with the 4 core image.
    • 7/30, 2nd Change - Added universal EX zip, this zip should modify your kernel to use only 4 cores, and it should modify it to utilize all 4 cores. You can flash this over most ROMs and it should work. Also added a donation url, and this changelog.
    • 7/30 - Updated this fix to greatly improve performance. Before this fix, the device was only using 1 core for foreground tasks, now it will use all 4 cores. Also revamped OP, and added Marshmallow images.
    • 7/23- Created this fix, stock boot.img, twrp, and EX kernel added.


    *What this fix does, and how to apply it:

    The problem:
    The problem with most of the devices in a BLOD, is that a hardware failure related to the BIG cluster has occurred. This fix remedies the problem by disabling the BIG cores. Unfortunately, this does mean that you will take a performance hit. However, I am continually working on ways to improve the device's performance.

    The update: If anyone remembers device performance with the first fix, it was hurt a lot, however, after finding out that the device was only using 1 core for all foreground tasks, I modified the ramdisk to utilize all 4 cores more effectively, and it helps a lot.

    Requirements: For this fix to work, you need:
    • A brain
    • A computer
    • A bootlooping 5X with an unlocked bootloader/OEM unlocking enabled
    • The modified files of your choice.
    • Fastboot on your computer (preferably installed system wide). If you do not know what this is, or do not have it, look at this post. Answer yes to all of the prompts to install it.

    How to apply the fix:
    1. Boot your phone into bootloader (hold power and volume down).
    2. Connect your phone to the computer.
    3. Go to the folder where you have the modified files, then hold shift and right click in a blank space, click on "open command prompt here" in the menu that pops up.
    4. In the command prompt: type "fastboot flash boot [name of the file here]" and then press enter. If you're flashing TWRP, replace boot with recovery. (Linux users, make sure you're running as root)
      Edit: with the new universal EX zip, you don't have to flash the modified boot.img now, you can just flash TWRP, and then flash the EX zip, and everything should work.
    5. Boot up your phone, and hopefully it should work!


    *If your phone is bootloader locked/OEM locked:

    You can try to get your phone to boot long enough to enable OEM unlocking. Some users have reported success by freezing their phone for a bit, then booting it. Others have let their battery drain all the way, and then tried to boot their phone, but the most successful method seems to be heating up your phone (a lot).
    If you do attempt any of these methods, make sure you have time and patience, as it will take a long time.

    To enable OEM unlocking and unlock bootloader:
    1. Go to settings.
    2. Go to developer options, if you do not see that, go to "about phone", scroll to build number, and then tap it 7 times. You should now see developer options in settings.
    3. Once you're in developer options, click on "OEM unlocking" and accept the prompt.
    4. Now reboot your phone to bootloader, connect your phone to the computer, and type "fastboot flashing unlock" Your bootloader should now be unlocked.

    *Downloads:

    • Boot.img from Android O DP6: Download | Mirror. This Image is the from the first official release of Android O, and is modified to use 4 cores. As a bonus, it also disables forced encryption. Thank you to @xls654 for figuring out how to get Android O to work.
    • Boot.img from stock 48C, 7.1.2 firmware (August security patch): Download | Mirror. This Image is modified to use only 4 cores, and is modified to utilize the 4 cores more effectively. I have had multiple people on the 6p say that first boot takes a while after flashing this, so just wait about 20 minutes before you declare something is wrong with it.
    • Boot.img from stock 47Z, 7.1.2 firmware: Download | Mirror. This Image is modified to use only 4 cores, and is modified to utilize the 4 cores more effectively. I have had multiple people on the 6p say that first boot takes a while after flashing this, so just wait about 20 minutes before you declare something is wrong with it.
    • TWRP version 3.1.1: Download | Mirror. This TWRP image is modified to use only 4 cores.
    • EX kernel version 5.03, for Android O: Download | Mirror. EX kernel for Android Oreo, modified to use 4 cores. You must flash it over the 4 core boot.img for it to work.
    • EX kernel version 4.12, universal zip: Download | Mirror. This zip is modified to use only 4 cores, and it will also apply the speed fix. Flash this in TWRP. I highly recommend you flash this, as it improves device performance notably, and disables forced encryption. This kernel should work with almost any other ROM, and it applies the core utilization mod from the first image, thanks to AnyKernel.
    • Boot.img modified to use only 1 Core. Some people were reporting that the 4 core images weren't working for them, someone suggested that I make a 1 core version to see if that helps at all. Here it is: Download | Mirror

    For Marshmallow:
    • Boot.img from the latest 6.0.1 20K firmware: Download | Mirror. This boot.img is modified to use only 4 cores, and is modified to utilize those 4 cores more effectively. Untested as of now.
    • Ex kernel version 1.2.0 for Marshmallow: Download | Mirror. This is the latest EX kernel for marshmallow, it will keep the core utilization mod from the above image, and should work on almost any other ROM, thanks to any kernel. Untested as of now.


    *Source Code:

    • Source for 4 core Android O DP6: Source.


    *Tested custom ROMS/kernels

    you should be able to use almost any ROM with a stock based kernel, just flash the EX zip over it.

    If you have a custom ROM/kernel that worked for you, let me know and I'll put it up here.


    *To improve performance slightly:

    • Flash a custom kernel. I will upload more kernels as people request more, so stay tuned.
    • Flash a custom ROM. Once again, I will upload more as people request more, so stay tuned.
    • Overclock the little cores. It can slightly help offset the lost performance, on my 6P, I have mine overclocked to 1632MHz, and it works perfectly for me. Edit: I actually recommend not overclocking. Many people have reported their Little cores failing, so I would go for longevity on this device, and keep it at stock clocks, or even underclock it. The speed difference you get from overclocking is negligible anyways.
    • Disable animations in developer options. Seriously, as soon as I found out about this tweak, I've used it on ever single device I've owned, it helps a ton.


    *Credits:

    @rchtk, His post here gave me the idea for how to modify the images.
    @flar2, He built the Elemental X kernel for this device, I merely made a small modification to his kernel to use 4 cores. In no way am I trying to steal and/or discredit his work.
    The TWRP development team, they built the TWRP recovery for this device, I merely made a small modification to their recovery to use 4 cores. In no way am I trying to steal and/or discredit their work.
    @xls654, He found out how to get Android O working with 4 cores.


    *FAQs:

    • What's the password for TWRP/Why is TWRP asking for a password? - In android 7.0, Google added forced encryption to the data partition. To get around this, click cancel when TWRP asks you for a password, and then factory reset the device. Then you can flash EX kernel/Magisk to disable forced encryption.
    • Why am I getting an error when I try to flash the images? - Your bootloader is probably not unlocked, try running the command "fastboot flashing unlock", If you get an error there too, then you will have to enable OEM unlocking before you can continue.
    • It's not working for me, how do I fix it? - My only advice for that is: "Flash the stock firmware for whatever version image you're trying to flash, then reflash the images again" If you're stuck on the boot animation, wait at least 20 minutes before you declare it's not working. If none of that works, chances are you have a different problem.
    • Does EX kernel have the new speed fix? - Yep, the EX kernel zip should apply the 4 core fix, and the speed fix. It should also work with almost any ROM, including stock.


    I would like to help as many people as I can, however, I am much more likely to be able to easily help you/reply to your post if you clearly state your problem and the steps you attempted to fix it. I will be much less likely to reply to posts such as "omggg i flashed the image and my phone won't boot helppp" Please read through post first, I did not spend time typing up this OP for no one to read it. If I can see that you read through the OP and have attempted all the steps, then I will be much more willing to help you.

    I set up donations on my profile, for those of you who want to donate. I have spent countless hours modifying, flashing, testing, and helping, don't get me wrong, I love doing this and helping y'all out, but donations really keep me motivated to keep going, and donations also will help me fund new equipment and devices that will help further my android development. Every single donation is appreciated :) Donate to me here!

    If this guide helped you, please click thanks, it means a lot to me :)
    48
    Guys.. bad news.. my Nexus 5X just got hit with the BLOD. 😢

    Good news for everyone is I spent a bit of time tonight to first patch TWRP 3.2.1-0-FBE (File-Based Encryption support) image to be 4core, then made an AnyKernel2 zip which will patch the existing boot and recovery partitions on-device to add all the 4core fixes from @XCnathan32.

    Should work over any ROM, any custom kernel, recovery, etc., can be added in queue after ROM, root zip + custom kernel to patch it from TWRP or FlashFire (so good for OTAs), and simplifies the initial process greatly since you can now fastboot boot any 4core recovery.img and then adb sideload my AK2 zip to fix the likely newer recovery you already had on your device. 👍


    Edit: See my new thread for updated files + step-by-step instructions: https://forum.xda-developers.com/nexus-5x/general/tool-bootloop-death-blod-workaround-t3819497
    12
    Update: I added a universal EX zip, this zip should make your device only use 4 cores, and utilize all 4 cores, so there's no need for flashing a separate boot.img before you flash EX. Also, with this zip, you should be able to flash EX over almost any ROM, and it should work.

    I also added a donation URL to my profile, donations keep me motivated to keep going, and they will be used to help me fund equipment and devices to further advance my android development. Every single donation is appreciated :)
    11
    i tryed all your .img file but noone works with it the 8.0 android oreo version, we are waiting the big update for boot.img cores :) nice work bro :good:

    p.s. im in bootloop

    I'm working on 8.0 right now. Unfortunately it is a challenge due to the changes in android O, but I will try to get it working as fast as I can.
    9
    Update: Welp, for me, school is starting in a couple weeks :( Which means I have to do all my summer assignments (that I had the whole summer to do), in two weeks. Cross Country race season is also starting for me, so I will be less active as a result of those two things. I will try my best to keep maintaining this and helping you guys though.

    Also, I am working on an application to make this process easy for beginners. I wanted to learn C#, so I figured this was a good way to help me learn it. Expect that to come later this week/next week (depending on how lazy I am).

    P.S: HUGE thank you to everyone who donated!! The support of this community is mind-blowing, and it means a lot to me that people appreciate my work enough to donate. Once again, thank you so much :)