Develop Bugs

[Q] 'Secure boot Error!' at boot, download mode and factory reset don't work

Hello,
Here is what led to my issue:
I rooted my phone using this method: http://forum.xda-developers.com/showthread.php?p=38886073#post38886073
Downloaded clockwork rom manager.
Here comes the thing I don't remember. At least i know that the last thing i did was to click on 'backup current rom'
After this the phone reset itself and this message came up:
Secure booting error!
Cause: boot certification verify
Then i tried to reset using the power button, which led me to the 'battery full' screen - afterwards i was able to reboot. As stupid as I am I just tried the same thing again. And ever since i am stuck at the 'Secure booting error!' screen.
I am unable to enter download mode. I get to the 'Hard factory reset' screen, but if i accept doing so, it says 'Secure booting error!' again.
I also remember clicking on 'restart into recovery mode' at some point, but this is not the last thing i did.
I am really desperate. Please, help me!

Well i had the same issue today... It happened after i did two changes. One of them was to to try to relock from freegee and flash twrp again from freegee. In my case i was able to go in download mode and flash original kk rom with lg flash tool.

Unfortunatly, trying to boot in downloadmode, i still get the same error :/

Jubi-Wan said:
Unfortunatly, trying to boot in downloadmode, i still get the same error :/
Click to expand...
Click to collapse
How are you trying to boot into download mode? And what factory reset screen? It seems as though you did not unlock the bootloader using freegee, if you make any changes and relock the boot loader you will get that error. But it seems that it has not been unlocked. If you hold power and volume up what happens? Same thing when power and volume down, one of them is recovery (possibly factory reset you are seeing) and the other is download mode. I don't remember right now but you should read the whole softbrick thread and see if you are missing something. You may need to use LGPNST to go back to stock, you can also use that program to flash a new recovery so read carefully and follow all steps.
When this happened to me I was able to flash an unlocked bootloader and it allowed me to use my phone again as it was before doing something stupid (for me it was an attempt to re lock the bootloader).

well, i managed to get into download mode. Obviously i used the wrong method to get into download mode...
I used this method and everything worked fine, so far. : http://forum.xda-developers.com/showthread.php?t=2249500
My phone doesn't boot now. Fast Boot doesnt work aswell.
All that happens is a white battery showing on the screen and when i try to fastboot all that happens is that the LED is blinking or glowing red after some while.

Jubi-Wan said:
well, i managed to get into download mode. Obviously i used the wrong method to get into download mode...
I used this method and everything worked fine, so far. : http://forum.xda-developers.com/showthread.php?t=2249500
My phone doesn't boot now. Fast Boot doesnt work aswell.
All that happens is a white battery showing on the screen and when i try to fastboot all that happens is that the LED is blinking or glowing red after some while.
Click to expand...
Click to collapse
What do you mean when you try to fastboot? Fastboot is basically the bootloader and allows you to select recovery or download mode. What you should have done after following that thread is go to recovery and wipe everything and flash a new ROM.
If you are saying that the bootloader is not coming up and allowing you into recovery then I believe something was missed.

After trying out some varioants of this it worked: http://forum.xda-developers.com/showthread.php?p=40274560&highlight=red+led#post40274560
I wiped the phone, but since I had to leave over the weekend i just turned it off and went away.
Now that I am back, nothing works now :/ The Phone doesnt react to anything, not even donwload-mode.
Is the battery too low maybe? It's on the wall now for a few hours, but it still doesn't react. It's not warm either.
edit:
when i charge the phone, i will get a 'watchdog bark' after some time allowing me to get into recovery. accesing downloadmode from there doesn't do anything. strangely, the recovery isnt trwp although it should be because teenybin comes with it. it's 'bbs.gaodi.net' which doesn't have a sideload feature. what do i do now?
edit2:
after 10000 tries i got into download mode. i don't want to **** up now so i won't do anything until i know exactly what to do.
any advice?
edit3:
got it working by flashing another teenybin which included trwp - then i installed miui via sideload. i don't have signal though, but i will open another thread for this since this is another issue.

Help me get out of this bootloop!

Hey guys,
Don't usually have to post but after searching all day I can't find a way out of this loop. My 10 is currently flashing the white HTC splash and rebooting endlessly. That's no big deal, but I ALSO have no recovery or download mode access.
The ONLY thing I can do to interrupt the loop is access fastboot by holding Vol UP + Vol Down on restart. Unfortunately trying to "reboot to recovery" only flashes the dark HTC Logo then immediately restarts to the original bootloop. Attempting to "reboot to download mode" simply resumes the boot loop.
The device is recognized in fastboot on my PC but unfortunately I cannot flash or erase anything because I'm in S-ON, so practically none of the fastboot commands work. I have been using TWRP recovery and Viper10 Rom.
Any help getting out of this loop is greatly appreciated. I was going to give up and pay the deductible and replace it, until I found out that the phone is backordered until October and my alternative is an LG, which I can't stand.
S O S!

Currently experiencing the exact same thing myself:
http://forum.xda-developers.com/htc-10/help/htc-10-bootlooping-t3441710

Valandil11 said:
Currently experiencing the exact same thing myself:
http://forum.xda-developers.com/htc-10/help/htc-10-bootlooping-t3441710
Click to expand...
Click to collapse
The only difference being that I let mine loop for a solid hour and it didn't successfully boot at all. In the past I was having issues sometimes when I restarted, but I would just create a backup and restore from it and it would work, which made me think the boot file was just either corrupt or non existent. I've never been locked out of recovery AND download mode, however.

[SOLVED] Android Pixel XL Boot Loop, Never Seen Before

My XL is stuck in a boot loop that I haven't found described anywhere. It begins with the bootloader unlocked warning screen then goes to the white "Google" boot screen, but within one second the screen goes black, waits about 10 seconds and runs through that cycle again. It also randomly (it seems) does the "Writing to EX4 file" screen before the bootloader unlocked warning screen.
It will cycle through this sequence forever if it's plugged in but when not plugged in it will seemingly power off after a random number of cycles. However, powering on does not require holding down the power button - it jumps directly to the beginning of the cycle, sometimes at the bootloader unlocked screen and sometimes at the EX4 screen.
At no point does my Windows 10 PC show the phone as being attached when plugged in to USB. Also, no combination or duration of the phone's physical buttons affect this in any way.
I was following the steps in this article and had just performed the second-last line in the post, "Reboot into the installed recovery." That's when the cycle started. Prior to the step "In TWRP, install twrp.zip" everything was working correctly, though I hadn't rooted yet, of course. I didn't reboot normally in between those two steps, so I can't say which of them caused the problem.
I'm running Android Update, 7.1.2 N2G47E and had been before beginning the procedure. It came from the OTA update and had unrooted the phone from the previous version.
Any and all help will be rewarded with 137 Antique, Pre-Web Internet Points and The Thanks of a Grateful Nation™.

I would fastboot latest factory image.
Just hold vol- when a reboot comes it will go into bootloader.

piz333 said:
My XL is stuck in a boot loop that I haven't found described anywhere. It begins with the bootloader unlocked warning screen then goes to the white "Google" boot screen, but within one second the screen goes black, waits about 10 seconds and runs through that cycle again. It also randomly (it seems) does the "Writing to EX4 file" screen before the bootloader unlocked warning screen.
It will cycle through this sequence forever if it's plugged in but when not plugged in it will seemingly power off after a random number of cycles. However, powering on does not require holding down the power button - it jumps directly to the beginning of the cycle, sometimes at the bootloader unlocked screen and sometimes at the EX4 screen.
At no point does my Windows 10 PC show the phone as being attached when plugged in to USB. Also, no combination or duration of the phone's physical buttons affect this in any way.
I was following the steps in this article and had just performed the second-last line in the post, "Reboot into the installed recovery." That's when the cycle started. Prior to the step "In TWRP, install twrp.zip" everything was working correctly, though I hadn't rooted yet, of course. I didn't reboot normally in between those two steps, so I can't say which of them caused the problem.
I'm running Android Update, 7.1.2 N2G47E and had been before beginning the procedure. It came from the OTA update and had unrooted the phone from the previous version.
Any and all help will be rewarded with 137 Antique, Pre-Web Internet Points and The Thanks of a Grateful Nation™.
Click to expand...
Click to collapse
Sounds like you were coming from the April 2017 update to the May 2017 OTA update. The May update included a new bootloader which performs additional verification on the boot image. I suspect that when you installed TWRP and rebooted, the May bootloader detects the changes TWRP installation made to your boot image and aborts the boot process resulting in your bootloop. Additional detail and information can be found in the linked thread and solution should be towards the end of the thread. You have a few options I think (assuming you can get into fastboot/recovery mode) - you can temporarily resolve by reverting back to the April 2017 bootloader which does not have the additional boot verification procedure or you can follow the steps to flash Chainfire's VerifiedBootSigner.zip if you prefer to get fully on the May update (including the May bootloader). Details are in the thread below. Good luck!
https://forum.xda-developers.com/pixel-xl/how-to/images-t3599709

piz333 said:
My XL is stuck in a boot loop that I haven't found described anywhere. It begins with the bootloader unlocked warning screen then goes to the white "Google" boot screen, but within one second the screen goes black, waits about 10 seconds and runs through that cycle again. It also randomly (it seems) does the "Writing to EX4 file" screen before the bootloader unlocked warning screen.
It will cycle through this sequence forever if it's plugged in but when not plugged in it will seemingly power off after a random number of cycles. However, powering on does not require holding down the power button - it jumps directly to the beginning of the cycle, sometimes at the bootloader unlocked screen and sometimes at the EX4 screen.
At no point does my Windows 10 PC show the phone as being attached when plugged in to USB. Also, no combination or duration of the phone's physical buttons affect this in any way.
I was following the steps in this article and had just performed the second-last line in the post, "Reboot into the installed recovery." That's when the cycle started. Prior to the step "In TWRP, install twrp.zip" everything was working correctly, though I hadn't rooted yet, of course. I didn't reboot normally in between those two steps, so I can't say which of them caused the problem.
I'm running Android Update, 7.1.2 N2G47E and had been before beginning the procedure. It came from the OTA update and had unrooted the phone from the previous version.
Any and all help will be rewarded with 137 Antique, Pre-Web Internet Points and The Thanks of a Grateful Nation™.
Click to expand...
Click to collapse
Just started with me today too.
I cannot get into recovery or boot loader
rebooting using the hard button just brings up this Dump to EXT4 and then into the ROM that is havnig a ish ton of force closes.
My plan is to back up some stuff I need to copy off the phone and then start factory reset from within settings.
EDIT:
I was rooted running stock
All i did was run a backup in TWRP
issues started after reooting.
Once i factory reset and re Root i will see if I can restore backup, maybe

sb1893 said:
Sounds like you were coming from the April 2017 update to the May 2017 OTA update. The May update included a new bootloader which performs additional verification on the boot image. I suspect that when you installed TWRP and rebooted, the May bootloader detects the changes TWRP installation made to your boot image and aborts the boot process resulting in your bootloop. Additional detail and information can be found in the linked thread and solution should be towards the end of the thread. You have a few options I think (assuming you can get into fastboot/recovery mode) - you can temporarily resolve by reverting back to the April 2017 bootloader which does not have the additional boot verification procedure or you can follow the steps to flash Chainfire's VerifiedBootSigner.zip if you prefer to get fully on the May update (including the May bootloader). Details are in the thread below. Good luck!
https://forum.xda-developers.com/pixel-xl/how-to/images-t3599709
Click to expand...
Click to collapse
I had forgotten that after I booted normally just before installing TWRP, the May OTA happened to arrive and I went ahead and installed it. Then the problem started after I installed TWRP. I used @mikaole's advice and got into bootloader (can't believe I hadn't done that, given all the button combinations I'd tried).
I re-flashed the April update and now the behavior is exactly the same except that the white Google boot screen lasts about 5 seconds and after a few boot tries I land on the "No command" screen. That sits for about a minute and boots again, landing again on "No command." Power+vol-up gets me to recovery mode but all I can do is go to bootloader or get back to "No command." I tried a factory reset, same result. I tried re-flashing April again, same result. Now I think I have the May bootloader with all else April.
I ran this:
Code:
fastboot set_active a
because I noticed that flashing the bootloader was always going to b. After flashing the bootloader again and seeing it go to a, the phone boots normally. I'm going to let the May update happen and wait to root again until after that.
One thing, I don't think the link you provided is the one you intended - there's none of the info you said would be there.
This has been very helpful. You and @mikaole got me through this. Thanks!

piz333 said:
I had forgotten that after I booted normally just before installing TWRP, the May OTA happened to arrive and I went ahead and installed it. Then the problem started after I installed TWRP. I used @mikaole's advice and got into bootloader (can't believe I hadn't done that, given all the button combinations I'd tried).
I re-flashed the April update and now the behavior is exactly the same except that the white Google boot screen lasts about 5 seconds and after a few boot tries I land on the "No command" screen. That sits for about a minute and boots again, landing again on "No command." Power+vol-up gets me to recovery mode but all I can do is go to bootloader or get back to "No command." I tried a factory reset, same result. I tried re-flashing April again, same result. Now I think I have the May bootloader with all else April. How do I revert the bootloader?
Also, I don't think the link you provided is the one you intended - there's none of the info you said would be there.
This has been very helpful so far. Thanks!
Click to expand...
Click to collapse
They flashing all the parts of the image manually. Something like this happened to a buddy of mine and using the flash all wouldn't fix. He couldn't get the device to boot until he did all the images manually.

piz333 said:
I had forgotten that after I booted normally just before installing TWRP, the May OTA happened to arrive and I went ahead and installed it. Then the problem started after I installed TWRP. I used @mikaole's advice and got into bootloader (can't believe I hadn't done that, given all the button combinations I'd tried).
I re-flashed the April update and now the behavior is exactly the same except that the white Google boot screen lasts about 5 seconds and after a few boot tries I land on the "No command" screen. That sits for about a minute and boots again, landing again on "No command." Power+vol-up gets me to recovery mode but all I can do is go to bootloader or get back to "No command." I tried a factory reset, same result. I tried re-flashing April again, same result. Now I think I have the May bootloader with all else April.
I ran this:
Code:
fastboot set_active a
because I noticed that flashing the bootloader was always going to b. After flashing the bootloader again and seeing it go to a, the phone boots normally. I'm going to let the May update happen and wait to root again until after that.
One thing, I don't think the link you provided is the one you intended - there's none of the info you said would be there.
This has been very helpful. You and @mikaole got me through this. Thanks!
Click to expand...
Click to collapse
Glad you got it working. I checked and I did link the thread I intended to. Starting at post #57 onward from that thread has the information on how to update to the May update and leverage Chainfire's VerifiedBootSigner.zip.
Thx,
S

Pixel bootloop
Hey guys, this is the only thread thqt i found here on XDA about pixel and pixel XL bootloop issue.
I'm about to buy a used Pixel 1st gen phone for really great deal, because it is in this bootloop. As the owner sad, it was on the Oreo upgrade. I'm wondering if its possible to fix it... What you guys say?
Thanks!!

rosendomurilo said:
Hey guys, this is the only thread thqt i found here on XDA about pixel and pixel XL bootloop issue.
I'm about to buy a used Pixel 1st gen phone for really great deal, because it is in this bootloop. As the owner sad, it was on the Oreo upgrade. I'm wondering if its possible to fix it... What you guys say?
Thanks!!
Click to expand...
Click to collapse
Well that depends. If the owner unlock the bootloader and then relocked it it could have screwed it up depending on what he was doing with it at the time resulting in a bootloop that cannot be fixed because it's hard brick now. I say can't be fixed only because the only way to get it fixed as far as I know is to contact someone here on the forums I'm not exactly sure who it is but they do fix hard bricked pixels for money. If I were you I would try and figure out if that's the case before buying it.

Phalanx7621 said:
Well that depends. If the owner unlock the bootloader and then relocked it it could have screwed it up depending on what he was doing with it at the time resulting in a bootloop that cannot be fixed because it's hard brick now. I say can't be fixed only because the only way to get it fixed as far as I know is to contact someone here on the forums I'm not exactly sure who it is but they do fix hard bricked pixels for money. If I were you I would try and figure out if that's the case before buying it.
Click to expand...
Click to collapse
Yes, that's my biggest fear right now... He sad he never had done anything like root or custom rom, he just had done a system update and the phone never boot correctly again.
I have a little bit of knowledge in android, i was thinking if just putting a custom rom it wouldn't solve, because i had other devices that i had put in bootloop and i was able to fix it just putting a custom rom...

rosendomurilo said:
Yes, that's my biggest fear right now... He sad he never had done anything like root or custom rom, he just had done a system update and the phone never boot correctly again.
I have a little bit of knowledge in android, i was thinking if just putting a custom rom it wouldn't solve, because i had other devices that i had put in bootloop and i was able to fix it just putting a custom rom...
Click to expand...
Click to collapse
Can you get to recovery ?

Phalanx7621 said:
Can you get to recovery ?
Click to expand...
Click to collapse
I'm not with the phone right now, I'm going to buy it next week... Correct if I am wrong, but if i can get to recovery or bootloader i can fix it, right?
I think he had tried to unlock the bootloader but without experience had bricked...

rosendomurilo said:
I'm not with the phone right now, I'm going to buy it next week... Correct if I am wrong, but if i can get to recovery or bootloader i can fix it, right?
I think he had tried to unlock the bootloader but without experience had bricked...
Click to expand...
Click to collapse
Yeah if you can get into recovery you can side load things. And if you can get to the boot loader screen you're fine.

Phalanx7621 said:
Yeah if you can get into recovery you can side load things. And if you can get to the boot loader screen you're fine.
Click to expand...
Click to collapse
Perfect! Just as I expected... Probably i will do an youtube guide if it works... Thanks bro!

Soft Brick from bad cable?

So earlier today I plugged in my charger into the phone, and it gave me an error messaging saying something about the cable being damaged, and System UI crashed. I unplugged it and made a mental note to buy another charger.
The device was having some issues with SystemUI properly rebooting, so I restarted the phone and got caught into a boot loop.
The device will not go past the HTC splash screen, just rebooting every few seconds.
It doesn't reboot when I go into the white screen bootloader, nor does ADB or fastboot oem detect it.
If I select download or recovery mode, one of two things happens:
1) It displays the monochromatic HTC logo for a few seconds and then reboots back into the normal bootloop.
2) It stays in the monochromatic HTC logo without doing anything else.
ADB does not work in any state, nor does trying to flash an RUU.
I've tried sticking an RUU with an SD Card and going into download mode, but nothing happens.
The device was running Leedroid at the time.
The bootloader is unlocked, and it is S-ON. It is a T-Mobile device with the Marshmallow Firmware installed.
I would very much appreciate help for this as I've been searching for solutions the entire afternoon.
I don't quite understand how a faulty cable would cause a bootloop but not completely fry the device.
Thanks.

Lohboh said:
So earlier today I plugged in my charger into the phone, and it gave me an error messaging saying something about the cable being damaged, and System UI crashed. I unplugged it and made a mental note to buy another charger.
The device was having some issues with SystemUI properly rebooting, so I restarted the phone and got caught into a boot loop.
The device will not go past the HTC splash screen, just rebooting every few seconds.
It doesn't reboot when I go into the white screen bootloader, nor does ADB or fastboot oem detect it.
If I select download or recovery mode, one of two things happens:
1) It displays the monochromatic HTC logo for a few seconds and then reboots back into the normal bootloop.
2) It stays in the monochromatic HTC logo without doing anything else.
ADB does not work in any state, nor does trying to flash an RUU.
I've tried sticking an RUU with an SD Card and going into download mode, but nothing happens.
The device was running Leedroid at the time.
The bootloader is unlocked, and it is S-ON. It is a T-Mobile device with the Marshmallow Firmware installed.
I would very much appreciate help for this as I've been searching for solutions the entire afternoon.
I don't quite understand how a faulty cable would cause a bootloop but not completely fry the device.
Thanks.
Click to expand...
Click to collapse
So you can't even get to download mode by holding power+vol down for several seconds?

Tarima said:
So you can't even get to download mode by holding power+vol down for several seconds?
Click to expand...
Click to collapse
No, it just brings up the same issue of it getting stuck on the monochrome HTC logo.

no idea as i've never had this happen, but when i've had issues in the past i'd let the battery drain completely, then charge it a little, then try booting to download mode. maybe you could try that? did you have twrp or any custom recovery installed?

ffuser1 said:
no idea as i've never had this happen, but when i've had issues in the past i'd let the battery drain completely, then charge it a little, then try booting to download mode. maybe you could try that? did you have twrp or any custom recovery installed?
Click to expand...
Click to collapse
I've tried that, and I have the latest TWRP.

Phone turns on, HTC logo shows up, recovery works but phone DOES NOT BOOT

My phone was a bit erratic and I decided to reboot it. Before that I installed a new Magisk Manager version, updated a module and uninstalled another (I should've had done one step a time, I never learn). After all this I rebooted and my phone no longer booted. the HTC logo shows up and then the screen becomes blank and nothing shows up.
I can reboot it pressing the Power + Volume Down buttons for 10-15 seconds, I can boot to bootloader, dowload mode and and recovery. The phone charges just fine in recovery or powered down. If I let it try to boot for a while and attempt "adb devices", nothing shows up, so I can't invoke "adb logcat" and see if it's in a boot loop or something. It's hard to debug and understand what's wrong.
Flashed Magisk Uninstaller, still doesn't boot. Another mistake is that I don't have a backup, yes, I'm an idiot. I don't understand why I keep living on the edge like this...
I use MaximusHD ROM and I'm now thinking of reinstalling this on top of my current installation to see if it fixes anything, as a last resort because I can't think of anything else. Thoughts?

rfgamaral said:
My phone was a bit erratic and I decided to reboot it. Before that I installed a new Magisk Manager version, updated a module and uninstalled another (I should've had done one step a time, I never learn). After all this I rebooted and my phone no longer booted. the HTC logo shows up and then the screen becomes blank and nothing shows up.
I can reboot it pressing the Power + Volume Down buttons for 10-15 seconds, I can boot to bootloader, dowload mode and and recovery. The phone charges just fine in recovery or powered down. If I let it try to boot for a while and attempt "adb devices", nothing shows up, so I can't invoke "adb logcat" and see if it's in a boot loop or something. It's hard to debug and understand what's wrong.
Flashed Magisk Uninstaller, still doesn't boot. Another mistake is that I don't have a backup, yes, I'm an idiot. I don't understand why I keep living on the edge like this...
I use MaximusHD ROM and I'm now thinking of reinstalling this on top of my current installation to see if it fixes anything, as a last resort because I can't think of anything else. Thoughts?
Click to expand...
Click to collapse
I can't speak to your specific issue with Magisk but you should easily be able to return to stock by flashing Maximus, or by running an RUU from your sdcard. The ruu will wipe your phone completely

Tarima said:
I can't speak to your specific issue with Magisk but you should easily be able to return to stock by flashing Maximus, or by running an RUU from your sdcard. The ruu will wipe your phone completely
Click to expand...
Click to collapse
Tried to reflash Maximus, didn't work, still didn't boot. Backed up everything I could and wiped everything, I'm now on Lineage OS 16.0. Thanks for your reply.