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Bootloader problems

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chadandchew

Member
Nov 15, 2019
14
1
Ive had my LG G7 for about a year now. I managed to unlock the bootloader without any problems and used magisk ok.

I just came to upgrade the firmware without any problems. I enabled dev and usb debug but the 'Enable oem unlock' button is greyed out and displays "bootloader already unlocked" ok so not a problem - that is until I come to access the bootloader again.
Here is the message:
Welcome to Fastboot mode: Please check "Enable OEM unlock" in developer options
adb commands no longer work at this point as connection is lost. Only choice is manually reboot or switch off.

WTF now what. Im unable to root or restore the bootloader. So even though its unlocked and displays the bootloader unlocked message when booting - Fastboot does not see it and it still wants me to 'Enable oem unlock' but its greyed out.

Any suggestions please anyone
 

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nttuan

Member
Jan 26, 2018
29
3
You can use QFIL to restore laf_a & laf_b. Then flash full rom (Refurbish) in Download mode.

ps: the reason is you do not flash full rom after unlock bootloader in order to tell to the machine that you are in the illegal mode kakaka.
 

chadandchew

Member
Nov 15, 2019
14
1
Thanks for your reply nttuan. I just about gave up hope. Im totally paranoid without root. No decent firewall, cant freeze garbage etc.
Being relatively unsure, would you mind going over the QFIL method with me.
Thanks
 

chadandchew

Member
Nov 15, 2019
14
1
Thanks for your reply nttuan. I just about gave up hope. Im totally paranoid without root. No decent firewall
Never used QFIL before. Where do I get the firehose elf file from. I noticed a couple of elf files in the extracted folder, is it one of these.
Do I have to create any xml files and do I have to rename any of the kdz extracted files?
Some posts are a bit old and for other models.
 

nttuan

Member
Jan 26, 2018
29
3
Instead of flash the boot_a from magisk_patched image, you can use command

fastboot boot magisk_patched.img

and use the LGUP to reflash the firmware.
 

chadandchew

Member
Nov 15, 2019
14
1
If you look at the photo above I LOSE ALL ADB commands after adb reboot bootloader.
fastboot boot magisk_patched.img or any other command just displays "Waiting For any Device" in CMD window.

This is my problem because the bootloader is already unlocked and oem greyed out - it is asking me to "Enable OEM Unlock"

I am wanting to either root the phone or restore bootloader to locked. Sorry for any confusion
 

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nttuan

Member
Jan 26, 2018
29
3
type fastboot devices and show me the result.
maybe you do not have correct fastboot driver
 

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chadandchew

Member
Nov 15, 2019
14
1
It did say waiting for any device but now its gone from bad to worse. I followed this guide Here and now all I get is fastboot screen, see photo. If I now try fastboot devices then fastboot flash boot_a magisk_patched.img it shows error which does not look good actually , photo 2. Cant get download mode. If I try to get it by holding volume button and inserting usb lead I get this nasty screen, photo 3. I think that some of the partitions may have been overwitten. . Stupid move on my part.

Forgot to mention - EDL is still accessable
 

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chadandchew

Member
Nov 15, 2019
14
1
Ive managed to sort the above problem
QFIL flashed only the following 6 files :

abl_a and abl_b
laf_a and laf_b
boot_a and boot_b

Phone rebooted perfectly after this.
Thanks for your advice
 
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    Ive managed to sort the above problem
    QFIL flashed only the following 6 files :

    abl_a and abl_b
    laf_a and laf_b
    boot_a and boot_b

    Phone rebooted perfectly after this.
    Thanks for your advice