Unlocked bootloader, fastboot not exist

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SiNec

Member
Mar 25, 2018
11
1
Hey, I have a problem, I spend 2 days on it and can't find solution. So in the past I unlocked bootloader, used Qfil, everything was fine but few months ago i switch to Z fold 3 and stop using my G8X, now I have a buyer for that phone and I can't lock bootloader at all.

So manual pressing buttons not working, I tried hundred times. adb reboot bootloader/fastboot just restarting my phone. I have access to recovery, EDL mode etc, my phone is visible as adb devices.
Choosing option restart to bootloader in recovery just restarting my phone. I tried every f**cking thing to do it with Qfil and do it again with switching abl_a etc but It's always sahara fail doesn't matter what version qfil or QPST is. I even installed clear windows 7 and still same problem (on my main PC I'm using windows 11). adb, fastboot, qualcomm 9008, lg drivers, everything is installed.

I installed different OS with KDZ with android 9/10/11, Canadian/US, no different

I beg you, please give me something what I can try cause I'm going crazy here. Like it's unlocked, it's not a phone what you can't unlock. I was hoping to write fastboot oem lock and that's it.

With unlocked bootloader fingerprint reader not working. Guy is waiting with money, I said I need few days to fix it but I feel I tried everything.


Thanks everyone who will answer here.
 
Last edited:

lethargy123

Member
Jun 27, 2022
5
0
You can try use ADB,adb reboot fastboot.If can't enter fastboot,that may be because boot or abl does not support FastBoot,you can try using adb reboot bootloader.
 

SiNec

Member
Mar 25, 2018
11
1
Like I said adb reboot fastboot and adb reboot bootloader just restarting my phone
 

lefttobleed

Senior Member
Apr 20, 2010
337
80
Like I said adb reboot fastboot and adb reboot bootloader just restarting my phone
If you cant get into qfil, then why are u expecting to get fastboot mode????
First load eng abl. For sahara error, use a different usb port, or restart to edl when you are connected to qfil or use a different pc.
 

SiNec

Member
Mar 25, 2018
11
1
If you cant get into qfil, then why are u expecting to get fastboot mode????
First load eng abl. For sahara error, use a different usb port, or restart to edl when you are connected to qfil or use a different pc.

In 2 days of struggling I tried everything even if obviously it was stupid and not possible but that actually was answer to guy who said to try use that commends ;)

I tried my PC and my laptop. Both of them had windows 11, I even installed Windows 7 on my laptop after many fails on both devices, all usb port on PC and laptop checked with 5 cables, with PC on tower cases and motherboard, on laptops i tried even usb type C, no results. Cable and PC exactly same what few month ago I used to unlocked it.

I'm always in edl mode cause with booted phone is just says "switch to edl -> fail to switch into emergency download mode"
 
Last edited:

KillerOpen

Member
Jun 22, 2022
8
0
LG G8X ThinQ
I'm not good at English, hope you understand: how to lock bootloader
edl mode -> use QFIL load image abl_a, abl_b by abl unlock file ( this step help you get in to fastboot mode).
get into fastboot mode: using fastboot command
fastboot flash abl_a xxx (xxx = your stock abl_a file)
fastboot flash abl_b xxx (xxx = your stock abl_b file)
fastboot flash boot_a xxx (xxx = your stock boot_a file)
fastboot flash boot_a xxx (xxx = your stock boot_b file)
fastboot oem lock


but lock bootloader doesn't fix fingerprint scanner working, have to downgrade to android 9 and fix by hide code *#546368#*xxx# example:
 
Last edited:

SiNec

Member
Mar 25, 2018
11
1
edl mode -> load image abl_a, abl_b by abl unlock file, get into fastboot mode: using fastboot command
fastboot flash abl_a xxx (xxx = your stock abl_a file)
fastboot flash abl_b xxx (xxx = your stock abl_b file)
fastboot flash boot_a xxx (xxx = your stock boot_a file)
fastboot flash boot_a xxx (xxx = your stock boot_b file)
fastboot oem lock


but lock bootloader doesn't fix fingerprint scanner working, have to downgrade to android 9 and fix by hide code *#546368#*xxx# example:
Thanks for reply. Its almost 3am for me and still fighting with it :D Fingerprint is one thing but my guy want locked bootloader cause he is scared of stuff like that and it shows warning when boot up.

But could you explain more your way with edl mode? I dont get it. Im trying for the whole day make rawprogram and patch so I could finally use QFIL, without it it's sahara problem. But all methods online are old. Most of it not supporting new KDZ files, python way not working, linux way not working. My phone is in 9008 drivers when in EDL mode and its not visible for adb. It's only visible with normal mode.

Is your way skip qfil and load modified adl files straight into device?
 

KillerOpen

Member
Jun 22, 2022
8
0
LG G8X ThinQ
Thanks for reply. Its almost 3am for me and still fighting with it :D Fingerprint is one thing but my guy want locked bootloader cause he is scared of stuff like that and it shows warning when boot up.

But could you explain more your way with edl mode? I dont get it. Im trying for the whole day make rawprogram and patch so I could finally use QFIL, without it it's sahara problem. But all methods online are old. Most of it not supporting new KDZ files, python way not working, linux way not working. My phone is in 9008 drivers when in EDL mode and its not visible for adb. It's only visible with normal mode.

Is your way skip qfil and load modified adl files straight into device?
if you want lock bootloader, enter edl mode, use QFIL load image abl_a and abl_b by a abl file (using to unlock), it help you can get intro fastboot ( press -vol and power until you hear sound on windows, release power, keep hold -vol ), when you get intro fastboot mode (status: unlocked) flash your stock abl_a abl_b boot_a boot_b by fastboot command before you lock bootloader by command: fastboot oem lock
 

SiNec

Member
Mar 25, 2018
11
1
But I cant use Qfil, All ways to get rawprogram and patch0 not works anymore. Some of them not supporting new KDZ, some of them have problems in general. I tried python way, linux way etc. All youtube videos are outdated. Idk how I can get that files for my g8x. without that(I think) I'm getting Sahara fail error and cant open partition menager. Last year when I was unlocking my bootloader everything work perfect, I rooted like 10lg before, first time in my life I have such a big problem with that phone.
 

KillerOpen

Member
Jun 22, 2022
8
0
LG G8X ThinQ
But I cant use Qfil, All ways to get rawprogram and patch0 not works anymore. Some of them not supporting new KDZ, some of them have problems in general. I tried python way, linux way etc. All youtube videos are outdated. Idk how I can get that files for my g8x. without that(I think) I'm getting Sahara fail error and cant open partition menager. Last year when I was unlocking my bootloader everything work perfect, I rooted like 10lg before, first time in my life I have such a big problem with that phone.
QFIL -> Flat Build > Browse > choose G8x firehose > Tools > Partition manager
Did it work ?
 

SiNec

Member
Mar 25, 2018
11
1
QFIL -> Flat Build > Browse > choose G8x firehose > Tools > Partition manager
Did it work ?
I'm still getting sahara fail error. 2 computers, trying windows 11, windows 8, windows 7, bunch of different drivers, 5 cables, still nothing. It's still "unable to read packet header" error :/
 

SiNec

Member
Mar 25, 2018
11
1
QFIL -> Flat Build > Browse > choose G8x firehose > Tools > Partition manager
Did it work ?
This is log:

2022-06-29 03:07:44.989 Image Search Path: C:\Users\Kopec\Downloads\firehose\
2022-06-29 03:07:45.004 Start Download
2022-06-29 03:07:45.004 Program Path:C:\Users\Kopec\Downloads\firehose\prog_ufs_firehose_sm8150_lge.elf
2022-06-29 03:07:45.017 ***** Working Folder:C:\Users\Kopec\AppData\Roaming\Qualcomm\QFIL\COMPORT_6
2022-06-29 03:09:15.465 Binary build date: Jun 25 2019 @ 03:16:15
2022-06-29 03:09:15.469 QSAHARASERVER CALLED LIKE THIS: 'C:\Program Files (x86)\Qualcomm\QPST\bin\QSaharaServer.ex'Current working dir: C:\Users\Kopec\AppData\Roaming\Qualcomm\QFIL\COMPORT_6
2022-06-29 03:09:15.475 Sahara mappings:
2022-06-29 03:09:15.477 2: amss.mbn
2022-06-29 03:09:15.482 6: apps.mbn
2022-06-29 03:09:15.485 8: dsp1.mbn
2022-06-29 03:09:15.488 10: dbl.mbn
2022-06-29 03:09:15.491 11: osbl.mbn
2022-06-29 03:09:15.493 12: dsp2.mbn
2022-06-29 03:09:15.495 16: efs1.mbn
2022-06-29 03:09:15.496 17: efs2.mbn
2022-06-29 03:09:15.498 20: efs3.mbn
2022-06-29 03:09:15.499 21: sbl1.mbn
2022-06-29 03:09:15.500 22: sbl2.mbn
2022-06-29 03:09:15.501 23: rpm.mbn
2022-06-29 03:09:15.502 25: tz.mbn
2022-06-29 03:09:15.504 28: dsp3.mbn
2022-06-29 03:09:15.505 29: acdb.mbn
2022-06-29 03:09:15.515 30: wdt.mbn
2022-06-29 03:09:15.516 31: mba.mbn
2022-06-29 03:09:15.517 13: C:\Users\Kopec\Downloads\firehose\prog_ufs_firehose_sm8150_lge.elf
2022-06-29 03:09:15.517
2022-06-29 03:09:15.518 03:09:15: ERROR: function: sahara_rx_data:276 Unable to read packet header. Only read 0 bytes.
2022-06-29 03:09:15.519
2022-06-29 03:09:15.519 03:09:15: ERROR: function: sahara_main:982 Sahara protocol error
2022-06-29 03:09:15.520
2022-06-29 03:09:15.521 03:09:15: ERROR: function: main:320 Uploading Image using Sahara protocol failed
2022-06-29 03:09:15.522
2022-06-29 03:09:15.522
2022-06-29 03:09:15.523 Download Fail:Sahara Fail:QSaharaServer Fail:process fail
2022-06-29 03:09:15.529 Finish Get GPT
 

KillerOpen

Member
Jun 22, 2022
8
0
LG G8X ThinQ
This is log:

2022-06-29 03:07:44.989 Image Search Path: C:\Users\Kopec\Downloads\firehose\
2022-06-29 03:07:45.004 Start Download
2022-06-29 03:07:45.004 Program Path:C:\Users\Kopec\Downloads\firehose\prog_ufs_firehose_sm8150_lge.elf
2022-06-29 03:07:45.017 ***** Working Folder:C:\Users\Kopec\AppData\Roaming\Qualcomm\QFIL\COMPORT_6
2022-06-29 03:09:15.465 Binary build date: Jun 25 2019 @ 03:16:15
2022-06-29 03:09:15.469 QSAHARASERVER CALLED LIKE THIS: 'C:\Program Files (x86)\Qualcomm\QPST\bin\QSaharaServer.ex'Current working dir: C:\Users\Kopec\AppData\Roaming\Qualcomm\QFIL\COMPORT_6
2022-06-29 03:09:15.475 Sahara mappings:
2022-06-29 03:09:15.477 2: amss.mbn
2022-06-29 03:09:15.482 6: apps.mbn
2022-06-29 03:09:15.485 8: dsp1.mbn
2022-06-29 03:09:15.488 10: dbl.mbn
2022-06-29 03:09:15.491 11: osbl.mbn
2022-06-29 03:09:15.493 12: dsp2.mbn
2022-06-29 03:09:15.495 16: efs1.mbn
2022-06-29 03:09:15.496 17: efs2.mbn
2022-06-29 03:09:15.498 20: efs3.mbn
2022-06-29 03:09:15.499 21: sbl1.mbn
2022-06-29 03:09:15.500 22: sbl2.mbn
2022-06-29 03:09:15.501 23: rpm.mbn
2022-06-29 03:09:15.502 25: tz.mbn
2022-06-29 03:09:15.504 28: dsp3.mbn
2022-06-29 03:09:15.505 29: acdb.mbn
2022-06-29 03:09:15.515 30: wdt.mbn
2022-06-29 03:09:15.516 31: mba.mbn
2022-06-29 03:09:15.517 13: C:\Users\Kopec\Downloads\firehose\prog_ufs_firehose_sm8150_lge.elf
2022-06-29 03:09:15.517
2022-06-29 03:09:15.518 03:09:15: ERROR: function: sahara_rx_data:276 Unable to read packet header. Only read 0 bytes.
2022-06-29 03:09:15.519
2022-06-29 03:09:15.519 03:09:15: ERROR: function: sahara_main:982 Sahara protocol error
2022-06-29 03:09:15.520
2022-06-29 03:09:15.521 03:09:15: ERROR: function: main:320 Uploading Image using Sahara protocol failed
2022-06-29 03:09:15.522
2022-06-29 03:09:15.522
2022-06-29 03:09:15.523 Download Fail:Sahara Fail:QSaharaServer Fail:process fail
2022-06-29 03:09:15.529 Finish Get GPT
have you switch emmc to ufs on QFIL ?
 

mclarenf195

Member
Mar 26, 2013
16
4
LG G8X ThinQ
I'm not good at English, hope you understand: how to lock bootloader
edl mode -> use QFIL load image abl_a, abl_b by abl unlock file ( this step help you get in to fastboot mode).
get into fastboot mode: using fastboot command
fastboot flash abl_a xxx (xxx = your stock abl_a file)
fastboot flash abl_b xxx (xxx = your stock abl_b file)
fastboot flash boot_a xxx (xxx = your stock boot_a file)
fastboot flash boot_a xxx (xxx = your stock boot_b file)
fastboot oem lock


but lock bootloader doesn't fix fingerprint scanner working, have to downgrade to android 9 and fix by hide code *#546368#*xxx# example:

Friend I have a problem with my g8x and the fingerprint sensor, since I did a bad flashed to a11 it does not work for me it gives me an error, do you think that downloading a9 can fix it?

I have blocked the network and error in nt code but I have understood that in another problem and it is fixed through server
 

Guille05

Member
Jun 21, 2022
16
3
Friend I have a problem with my g8x and the fingerprint sensor, since I did a bad flashed to a11 it does not work for me it gives me an error, do you think that downloading a9 can fix it?

I have blocked the network and error in nt code but I have understood that in another problem and it is fixed through server
I've tried A9 (the indian variant given that's the one people say works) to fix my fp scanner and had no luck, but that's the only solution people give so maybe on yours it will work.
 
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Reactions: mclarenf195

SiNec

Member
Mar 25, 2018
11
1
Friend I have a problem with my g8x and the fingerprint sensor, since I did a bad flashed to a11 it does not work for me it gives me an error, do you think that downloading a9 can fix it?

I have blocked the network and error in nt code but I have understood that in another problem and it is fixed through server
I tried with Android 9 UM version and it works. Test will fail but when you go to the settings it will let you to scan fingerprint. After that you need to update phone from the phone, not installing new KDZ. when you will update to androind 10/11(yours prefers) it's still working. I even did factory reset and it still works fine
 
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lefttobleed

Senior Member
Apr 20, 2010
337
80
This is log:

2022-06-29 03:07:44.989 Image Search Path: C:\Users\Kopec\Downloads\firehose\
2022-06-29 03:07:45.004 Start Download
2022-06-29 03:07:45.004 Program Path:C:\Users\Kopec\Downloads\firehose\prog_ufs_firehose_sm8150_lge.elf
2022-06-29 03:07:45.017 ***** Working Folder:C:\Users\Kopec\AppData\Roaming\Qualcomm\QFIL\COMPORT_6
2022-06-29 03:09:15.465 Binary build date: Jun 25 2019 @ 03:16:15
2022-06-29 03:09:15.469 QSAHARASERVER CALLED LIKE THIS: 'C:\Program Files (x86)\Qualcomm\QPST\bin\QSaharaServer.ex'Current working dir: C:\Users\Kopec\AppData\Roaming\Qualcomm\QFIL\COMPORT_6
2022-06-29 03:09:15.475 Sahara mappings:
2022-06-29 03:09:15.477 2: amss.mbn
2022-06-29 03:09:15.482 6: apps.mbn
2022-06-29 03:09:15.485 8: dsp1.mbn
2022-06-29 03:09:15.488 10: dbl.mbn
2022-06-29 03:09:15.491 11: osbl.mbn
2022-06-29 03:09:15.493 12: dsp2.mbn
2022-06-29 03:09:15.495 16: efs1.mbn
2022-06-29 03:09:15.496 17: efs2.mbn
2022-06-29 03:09:15.498 20: efs3.mbn
2022-06-29 03:09:15.499 21: sbl1.mbn
2022-06-29 03:09:15.500 22: sbl2.mbn
2022-06-29 03:09:15.501 23: rpm.mbn
2022-06-29 03:09:15.502 25: tz.mbn
2022-06-29 03:09:15.504 28: dsp3.mbn
2022-06-29 03:09:15.505 29: acdb.mbn
2022-06-29 03:09:15.515 30: wdt.mbn
2022-06-29 03:09:15.516 31: mba.mbn
2022-06-29 03:09:15.517 13: C:\Users\Kopec\Downloads\firehose\prog_ufs_firehose_sm8150_lge.elf
2022-06-29 03:09:15.517
2022-06-29 03:09:15.518 03:09:15: ERROR: function: sahara_rx_data:276 Unable to read packet header. Only read 0 bytes.
2022-06-29 03:09:15.519
2022-06-29 03:09:15.519 03:09:15: ERROR: function: sahara_main:982 Sahara protocol error
2022-06-29 03:09:15.520
2022-06-29 03:09:15.521 03:09:15: ERROR: function: main:320 Uploading Image using Sahara protocol failed
2022-06-29 03:09:15.522
2022-06-29 03:09:15.522
2022-06-29 03:09:15.523 Download Fail:Sahara Fail:QSaharaServer Fail:process fail
2022-06-29 03:09:15.529 Finish Get GPT
The elf file is corrupt
 
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  • 1
    Friend I have a problem with my g8x and the fingerprint sensor, since I did a bad flashed to a11 it does not work for me it gives me an error, do you think that downloading a9 can fix it?

    I have blocked the network and error in nt code but I have understood that in another problem and it is fixed through server
    I've tried A9 (the indian variant given that's the one people say works) to fix my fp scanner and had no luck, but that's the only solution people give so maybe on yours it will work.
    1
    Friend I have a problem with my g8x and the fingerprint sensor, since I did a bad flashed to a11 it does not work for me it gives me an error, do you think that downloading a9 can fix it?

    I have blocked the network and error in nt code but I have understood that in another problem and it is fixed through server
    I tried with Android 9 UM version and it works. Test will fail but when you go to the settings it will let you to scan fingerprint. After that you need to update phone from the phone, not installing new KDZ. when you will update to androind 10/11(yours prefers) it's still working. I even did factory reset and it still works fine
    1
    This is log:

    2022-06-29 03:07:44.989 Image Search Path: C:\Users\Kopec\Downloads\firehose\
    2022-06-29 03:07:45.004 Start Download
    2022-06-29 03:07:45.004 Program Path:C:\Users\Kopec\Downloads\firehose\prog_ufs_firehose_sm8150_lge.elf
    2022-06-29 03:07:45.017 ***** Working Folder:C:\Users\Kopec\AppData\Roaming\Qualcomm\QFIL\COMPORT_6
    2022-06-29 03:09:15.465 Binary build date: Jun 25 2019 @ 03:16:15
    2022-06-29 03:09:15.469 QSAHARASERVER CALLED LIKE THIS: 'C:\Program Files (x86)\Qualcomm\QPST\bin\QSaharaServer.ex'Current working dir: C:\Users\Kopec\AppData\Roaming\Qualcomm\QFIL\COMPORT_6
    2022-06-29 03:09:15.475 Sahara mappings:
    2022-06-29 03:09:15.477 2: amss.mbn
    2022-06-29 03:09:15.482 6: apps.mbn
    2022-06-29 03:09:15.485 8: dsp1.mbn
    2022-06-29 03:09:15.488 10: dbl.mbn
    2022-06-29 03:09:15.491 11: osbl.mbn
    2022-06-29 03:09:15.493 12: dsp2.mbn
    2022-06-29 03:09:15.495 16: efs1.mbn
    2022-06-29 03:09:15.496 17: efs2.mbn
    2022-06-29 03:09:15.498 20: efs3.mbn
    2022-06-29 03:09:15.499 21: sbl1.mbn
    2022-06-29 03:09:15.500 22: sbl2.mbn
    2022-06-29 03:09:15.501 23: rpm.mbn
    2022-06-29 03:09:15.502 25: tz.mbn
    2022-06-29 03:09:15.504 28: dsp3.mbn
    2022-06-29 03:09:15.505 29: acdb.mbn
    2022-06-29 03:09:15.515 30: wdt.mbn
    2022-06-29 03:09:15.516 31: mba.mbn
    2022-06-29 03:09:15.517 13: C:\Users\Kopec\Downloads\firehose\prog_ufs_firehose_sm8150_lge.elf
    2022-06-29 03:09:15.517
    2022-06-29 03:09:15.518 03:09:15: ERROR: function: sahara_rx_data:276 Unable to read packet header. Only read 0 bytes.
    2022-06-29 03:09:15.519
    2022-06-29 03:09:15.519 03:09:15: ERROR: function: sahara_main:982 Sahara protocol error
    2022-06-29 03:09:15.520
    2022-06-29 03:09:15.521 03:09:15: ERROR: function: main:320 Uploading Image using Sahara protocol failed
    2022-06-29 03:09:15.522
    2022-06-29 03:09:15.522
    2022-06-29 03:09:15.523 Download Fail:Sahara Fail:QSaharaServer Fail:process fail
    2022-06-29 03:09:15.529 Finish Get GPT
    The elf file is corrupt