Oneplus 6 in Fastboot Loop - OnePlus 6 Questions & Answers

Hi,
i'm facing the problem that my phone only starts in "FastBoot Mode" at least i guess that's the mode.
OnePlus 6 with root.
It happened after i rebooted after installing an OTA Update and installing a Magisk Manager Update.
I used the method described here. The last few times it worked perfectly.
But now the only thing that happens when i try to boot the phone is a screen that says
FastBoot Mode
PRODUCT_NAME - sdm845
VARIANT - SDM UFS
BOOTLOADER VERSION -
BASEBAND VERSION -
SERIAL NUMBER - d8a34971
SECURE BOOT - yes
DEVICE STATE - unlocked
with the volume button i can select "START, Restart bootloader, Recovery Mode and Power off"
but nothing happens when i select e.g. Recovery Mode, or simply START.
The phone shows the boot logo for a second, then I'm back at the screen with "FastBoot Mode"
I installed the USB-drivers for the device and can find it with my PC when i type "fastboot devices" in the command prompt.
But that's pretty much all. I don't know how to continue.
I would be very glad if i could keep my data, is there a way to save my phone and if not how do i install the normal OS again?
I really hope someone can help me here.
Edit:
When I type "adb devices" it says "List of devices attached" but there is no entry.
USB-Debugging is on, since the Root-process i didn't touch the developer options
So should be the USB mode for file transfer (MTP)
I'm not sure if i checked the "always allow from this computer" setting
So following this guide the only thing i can't do is checking the prompt for USB-debugging since i can't boot the OS.
Is there anoter way to get a adb connection?

[ROM][STOCK][FASTBOOT][OP6] Stock Fastboot ROMs for OnePlus 6
Things are changing with the advent of project treble and seamless updates. OnePlus will no longer release ROMs flashable via stock recovery (with twrp is possible but not recommended). The updates will be done on the slot not used for example...
forum.xda-developers.com
For everyone that can't connect to the device via ADB but fastboot, this does the trick.
Thank you guys!

Related

[Q] Issues flashing custom recovery

I just got this phone, and was told to unlock the bootloader and flash custom recovery as the first step, so I'm following this guide: forums.oneplus.net/threads/full-guide-setting-drivers-up-unlocking-bootloader-flashing-recovery-roms-kernels-rooting.291274/
I've been following it to a T and everything was working well. Once I got up to #3 and type in cmd "fastboot reboot" and it boots back to normal mode (so I can disable Cyanogen Recovery), typing "adb reboot bootloader" in cmd returns "error: device not found." If I'm in fastboot mode and enter "fastboot oem device-info" it returns true for tampered and unlocked so I know I have the bootloader unlocked. If I'm in normal mode, the phone shows up in device manager under portable devices. If I uninstall it, it disappears from the list. Once I unplug it and plug it back in, it pops back up in the same place, saying device installed correctly. If I try to update the drivers, most of the options from the Manufacturer list (see in the gifs from the guide) are gone, including the google ones.
How do I move from here? should I just wipe the whole thing and try again? What's the best way to do that? If I use the the USBDeview thing and remove the A0001 driver, will that allow me to put the android ADB Interface on the phone (Basically starting over)?
Thanks friends. Really excited to get going on Android!
threemor said:
I just got this phone, and was told to unlock the bootloader and flash custom recovery as the first step, so I'm following this guide: forums.oneplus.net/threads/full-guide-setting-drivers-up-unlocking-bootloader-flashing-recovery-roms-kernels-rooting.291274/
I've been following it to a T and everything was working well. Once I got up to #3 and type in cmd "fastboot reboot" and it boots back to normal mode (so I can disable Cyanogen Recovery), typing "adb reboot bootloader" in cmd returns "error: device not found." If I'm in fastboot mode and enter "fastboot oem device-info" it returns true for tampered and unlocked so I know I have the bootloader unlocked. If I'm in normal mode, the phone shows up in device manager under portable devices. If I uninstall it, it disappears from the list. Once I unplug it and plug it back in, it pops back up in the same place, saying device installed correctly. If I try to update the drivers, most of the options from the Manufacturer list (see in the gifs from the guide) are gone, including the google ones.
How do I move from here? should I just wipe the whole thing and try again? What's the best way to do that? If I use the the USBDeview thing and remove the A0001 driver, will that allow me to put the android ADB Interface on the phone (Basically starting over)?
Thanks friends. Really excited to get going on Android!
Click to expand...
Click to collapse
You probably don't have ADB enabled on your OPO, but you don't even need it for this. "adb reboot bootloader" is just a handy way of rebooting to fastboot without shutting down and holding the up volume button while turning it on. Once you get into fastboot by doing that, continue on as the guide says! (i.e. "fastboot flash recovery xxxx.img")

No recovery mode, no fastboot, no option to reinstall twrp

Hey folks,
i have a problem with my shieldtablet. The fastboot doesn't work properly. I cannot load anything via "fastboot flash blablabla.img". Minimal ADB and Fastboot just shows "waiting for device" and if i check the devices via "fastboot devices" is just shows nothing but the normal command prompt.
Then i did a mistake and flashed the twrp 3 version with an older one, so i am unable to enter the recovery-mode. If i chose Recovery Mode via bootloader (or if i restart the tablet into recovery mode) it has a short bootloop and then after some trials it starts normal into Blisspop.
How could i flash this without the fastboot? Is there any trick i could use?
The tablet is unlocked. I had several custom-roms installed. Currently Blisspop 6.4 without playstore.
That looks like your PC is not seeing your tablet. Boot into fastboot mode, connect it to your PC and look in Windows device manager for the device.
Thanks a lot! ADB worked fine on Win10. Last time I flashed the recovery was on my old Win7-System. It seems, that the Upgrade deleted just the fastboot drivers.
One last question: is it normal, that if i chose the fastboot protocoll entry on the bootloader, that it restarts the bootloader?
Yes, that's normal. The menu entry is redundant because when you see it you are in fastboot mode already.

Phone wont go into bootloader. How to root + flash new recovery?

Hello. I can't get my phone rooted in any way.
I want to Root so I can use TWRP app to flash TWRP recovery .img, and after that I can boot into TWRP recovery and flash new ROM. Correct????
What I've tried so far. OppoTools 1.6.5 = One key root gets hard stuck on Oppo logo at start-up and then I have to flash Coloros ROM again from recovery. Also KingRoot says app not installed. On windows version of KingRoot it gets to some percentage and then it Fails.
I have downloaded "unlocked bootloader" Coloros from this forum that was mentioned before ( Dropbox link )
I have also tried two different ColorOs versions.
I have installed 15sec ADB installer.
I plug my phone into PC and run CMD.
I type adb devices into command prompt and it detects my R7 plus.
then I try to command " adb reboot bootloader "
Phone restarts normally and doesnt go to bootloader. Tell me if im stupid, but isn't Bootloader different than Recovery? Because I can get to recovery command "adb reboot recovery"
I tried some weird button combination Vol+ Vol- + Power and phone semibricked for awhile and PC didnt even react USB driver correctly and almost waved the white flag on this case.
I've enabled USB-debuggin and OEM unlock from devices dev-options.
When I to type command "fastboot oem unlock" on command prompt is says Waiting for device. Nothing pops-up on device and nothing happens.
So now Im stuck on situation that my phone doesnt launch into bootloader where presumably "fastboot oem unlock" would work?
If you have flashed the version of Color OS that has bootloader enabled, you should simply need to go into the settings, enable USB debugging and OEM unlocking, then shutdown the phone before holding the power and volume+ buttons and waiting the ADB bootloader screen. After that, just plug it into the computer and follow the guide on flashing twrp with ADB.

Phone Wont Start

Hey there masterfully smart megabrains of the XDA world, I've gotten myself into a bit of a pickle. I accidentally chose the OTA option from Magisk when I hadnt just installed an OTA update. Now my phone when i restart it it just sits spinning the Oneplus logo.
I do have access to Fastboot.
I do have access to Recovery.
I only have stock Recovery, no TWRP installed.
I did not have USB debugging enabled before this issue happened.
ADB is installed and I have my drivers installed, but when I use powershell to enter the command adb devices my device isnt listed when I have the phone connected via USB and in Fastboot mode. When I check device manager Android Device is just listed rather than the device name, so I'm not sure what else I can do to get my device to be recognized correctly. I feel like if i could just get ADB to recognize my device, i could fastboot flash the stock rom. Or if there is a way to swap to the other boot slot I think that would also save me. I've been trying to google and search around but I'm having trouble finding the answers I seek, so please megabrains, save me!
J0hncramer said:
Hey there masterfully smart megabrains of the XDA world, I've gotten myself into a bit of a pickle. I accidentally chose the OTA option from Magisk when I hadnt just installed an OTA update. Now my phone when i restart it it just sits spinning the Oneplus logo.
I do have access to Fastboot.
I do have access to Recovery.
I only have stock Recovery, no TWRP installed.
I did not have USB debugging enabled before this issue happened.
ADB is installed and I have my drivers installed, but when I use powershell to enter the command adb devices my device isnt listed when I have the phone connected via USB and in Fastboot mode. When I check device manager Android Device is just listed rather than the device name, so I'm not sure what else I can do to get my device to be recognized correctly. I feel like if i could just get ADB to recognize my device, i could fastboot flash the stock rom. Or if there is a way to swap to the other boot slot I think that would also save me. I've been trying to google and search around but I'm having trouble finding the answers I seek, so please megabrains, save me!
Click to expand...
Click to collapse
You shouldn't type adb devices in fastboot mode. It won't show. Instead type (fastboot devices).
LokifiedMee said:
You shouldn't type adb devices in fastboot mode. It won't show. Instead type (fastboot devices).
Click to expand...
Click to collapse
I just tried fastboot devices in powershell while the phone is connected via USB in fastboot mode and nothing was listed
Edit: i was able to get fastboot to work, I had to do the following steps i found on stack exchange to get my device to show up properly in device manager:
https://stackoverflow.com/questions/8588595/android-fastboot-devices-not-returning-device
Open device manager
Find Unknown "Android" device (likely listed under Other devices with an exclamation mark)
Update driver
Browse my computer for driver software
Let me pick from a list of devices, select List All Devices
Under "Android device" or "Google Inc", you will find "Android Bootloader Interface"
Choose "Android Bootloader Interface"
Click "yes" when it says that driver might not be compatible
Click to expand...
Click to collapse
With fastboot working and issues in device manager solved I was able to get TWRP loaded to my phone via fastboot and change my boot slot to get back into the phone

Oppo A5 2020 (CPH1931) won't go in to fastboot mode/bootloader

I want to root my phone, install custom recovery and eventually a custom ROM. For this, I need to unlock the bootloader.
I have an Oppo A5 2020 CPH1931. It should go into bootloader when I press volume+ and power buttons together for 5 seconds after completely turning off the phone. But when I do this, it boots like normal. Tried all different combinations and durations. I am able to boot into recovery but not fastboot mode. I have turned on the "OEM unlocking" option in developer options.
I tried it through ADB, it says fastboot on the screen for half a second and then once again jumps back to normal booting. I also tried to already put the fastboot command "fastboot oem unlock". When it says <waiting for device> I use another terminal to try to boot into fastboot with ADB. But this does not work (also tried this with "fastboot flashing unlock").
By the way, my devices only shows up with adb devices when I select transfer files upon connecting the USB cable. When I select just charge it doesn't even show.
On computer install the suitable OPPO Android USB Driver
Download Oppo USB Driver for Windows (Latest Driver)
Download the Latest Oppo USB Driver to connect Oppo Smartphone and Tablets to the Windows Computer without PC Suite Application.
androidmtk.com
Anteino said:
I want to root my phone, install custom recovery and eventually a custom ROM. For this, I need to unlock the bootloader.
I have an Oppo A5 2020 CPH1931. It should go into bootloader when I press volume+ and power buttons together for 5 seconds after completely turning off the phone. But when I do this, it boots like normal. Tried all different combinations and durations. I am able to boot into recovery but not fastboot mode. I have turned on the "OEM unlocking" option in developer options.
I tried it through ADB, it says fastboot on the screen for half a second and then once again jumps back to normal booting. I also tried to already put the fastboot command "fastboot oem unlock". When it says <waiting for device> I use another terminal to try to boot into fastboot with ADB. But this does not work (also tried this with "fastboot flashing unlock").
By the way, my devices only shows up with adb devices when I select transfer files upon connecting the USB cable. When I select just charge it doesn't even show.
Click to expand...
Click to collapse
Having same problem bro
Anteino said:
I want to root my phone, install custom recovery and eventually a custom ROM. For this, I need to unlock the bootloader.
I have an Oppo A5 2020 CPH1931. It should go into bootloader when I press volume+ and power buttons together for 5 seconds after completely turning off the phone. But when I do this, it boots like normal. Tried all different combinations and durations. I am able to boot into recovery but not fastboot mode. I have turned on the "OEM unlocking" option in developer options.
I tried it through ADB, it says fastboot on the screen for half a second and then once again jumps back to normal booting. I also tried to already put the fastboot command "fastboot oem unlock". When it says <waiting for device> I use another terminal to try to boot into fastboot with ADB. But this does not work (also tried this with "fastboot flashing unlock").
By the way, my devices only shows up with adb devices when I select transfer files upon connecting the USB cable. When I select just charge it doesn't even show.
Click to expand...
Click to collapse
I have same issue. How did u fix it
News?oppo a5 2020 cph1931 ii have this model

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