Develop Bugs

[Q] boot to recovery

when i decide to change rom, after flashing kernel by fastboot and power on phone, I can't going to recovery by pressing volum down.
is there a command for fastboot to boot phone to recovery without pressing volum down?

Use adb i.e. adb reboot recovery

Many ways to do this...Easy wasy out,try an app like rom manager which gives u a direct recovery boot option,or u can use comand line prompts from ur PC ..or use terminal emulator..type in /system/bin/reboot recovery..

sinkster said:
Use adb i.e. adb reboot recovery
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Click to collapse
i connect phone in fastboot mode and use adb reboot recovery but not working! "error device not found"

Forgot, you can only be connected to adb if the phone's active or in recovery. When it's rebooting are you repeatedly pressing the buttons or holding them?

Hi, I am having a simlar issue. I flashed the Lupus kernel and after i turned of my phone, I pressed the volume down button while i turned the phone on and once it loads it just goes into safe mode. Am i doing something wrong?
EDIT: I was holding the button down. Not pressing repeatedly. All good now. Thanks.

amir143 said:
i connect phone in fastboot mode and use adb reboot recovery but not working! "error device not found"
Click to expand...
Click to collapse
flash again driver package in driver folder flashtools and select your device options

rod555 said:
flash again driver package in driver folder flashtools and select your device options
Click to expand...
Click to collapse
I do it but adb not working in fastboot mode

amir143 said:
I do it but adb not working in fastboot mode
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Click to collapse
try flashing CWM again ?

amir143 said:
I do it but adb not working in fastboot mode
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Click to collapse
your OS? Win7 x64?

Hi amir143!
You could try installing x-Parts (a free application from the market).
Good luck.

I thinks it's kernel dependent..
try pressing Vol-down OR backward button several times when the LED lights OR the phone vibrate OR the logo glow from normal after powered-on.

K5, A6020l36, Lineage OS 14.1 unrooted, Can't access TWRP, Help!

*Noob*
Lenovo K5, A6020l36, running Lineage OS 14.1 unrooted, can no longer access TWRP boot loader, how do I root the phone and access TWRP without being able to access TWRP? Thanks in advance.
BTW... ADB sees the device via my Mac for what that's worth.

[DEVICE IN BOOTLOADER] [ADB VIA PROMPT IN PC]
Code:
fastboot boot twrp.img
Inside TWRP, go to Install > Image File > twrp.img
DONE.
(twrp.img has to be in your PC, from where you are running ADB, and in your device too.)
You could also:
Code:
fastboot flash recovery twrp.img
and try to see if your recovery is fixed.

lucasdeeiroz said:
[DEVICE IN BOOTLOADER] [ADB VIA PROMPT IN PC]
Code:
fastboot boot twrp.img
Inside TWRP, go to Install > Image File > twrp.img
DONE.
(twrp.img has to be in your PC, from where you are running ADB, and in your device too.)
You could also:
Code:
fastboot flash recovery twrp.img
and try to see if your recovery is fixed.
Click to expand...
Click to collapse
Muito obrigado
When I try the commands it hangs on "Waiting for Device" even though it sees the device....
any more ideas you beautiful people?

theconkeyboy said:
Muito obrigado
When I try the commands it hangs on "Waiting for Device" even though it sees the device....
any more ideas you beautiful people?
Click to expand...
Click to collapse
Reinstall your adb/fastboot and device drivers. If you can run it in a Linux PC, it would be better. This is a common issue.
(Oh, and don't forget to enable USB debugging in Developer settings on your device, that's super important).

theconkeyboy said:
*Noob*
Lenovo K5, A6020l36, running Lineage OS 14.1 unrooted, can no longer access TWRP boot loader, how do I root the phone and access TWRP without being able to access TWRP? Thanks in advance.
BTW... ADB sees the device via my Mac for what that's worth.
Click to expand...
Click to collapse
I would suggest :
Shutdown your device
Reboot to fastboot mode via "Power" + "Volume -" for a few seconds until you reboot and see a Lenovo blank screen with "Power key long press can reboot the phone" at the bottom
Plug your device to your computer
Test fastboot via "fastboot devices" on your computer (you should see a number)
Flash TWRP via "fastboot flash recovery <the TWRP file on your computer>"
Reboot to TWRP by holding "Power" + "Volume +" and select "recovery" on the menu that will appear
Hope it will work for you

Stuck on Fastboot

Hi,
I got a rooted yureka 5.1.1 [privacy guard su mode] on which I tried to install lineage os but the recovery being cyanogen one I installed TWRP manager and flashed TWRP 3.2.1 which was shown to be successful. Now am unable to enter the recovery and instead am stuck on fastboot mode as when I press power button instead of starting the device it's flashing fastboot mode and yureka logo very fast. When connected to my PC it shows fastboot mode ..what to do?

Intall this twrp
prince.j said:
Hi,
I got a rooted yureka 5.1.1 [privacy guard su mode] on which I tried to install lineage os but the recovery being cyanogen one I installed TWRP manager and flashed TWRP 3.2.1 which was shown to be successful. Now am unable to enter the recovery and instead am stuck on fastboot mode as when I press power button instead of starting the device it's flashing fastboot mode and yureka logo very fast. When connected to my PC it shows fastboot mode ..what to do?
Click to expand...
Click to collapse
Install below twrp unofficial via pc. After that remove the battery and put again& do normal start. Problem should be resolved
https://forum.xda-developers.com/yureka/orig-development/unofficial-twrp-3-2-1-0-tomato-t3717099

Thanks
It worked like a charm.
praveen139 said:
Install below twrp unofficial via pc. After that remove the battery and put again& do normal start. Problem should be resolved
https://forum.xda-developers.com/yureka/orig-development/unofficial-twrp-3-2-1-0-tomato-t3717099
Click to expand...
Click to collapse

No OS is installed. Moreover recovery cannot be accessed. Nor can flash it via adb.

Previously I was using Ressurection Remix treble rom which is based on android 9 pie. I went to TWRP and wiped the OS. Then I tried to install a new rom called Dot OS. But it showed error 7. So I flashed Vendortofactory zip within twrp and without rebooting again into TWRP I flashed a new TWRP image within TWRP by selecting Recovery mode. After that I cant boot into TWRP and as already my OS is gone I also cannot boot into any system. Moreover my device is not getting detected in my PC. I cannot install TWRP by writing commands in cmd, while the phone is in fastboot mode as the device is not getting detected in my pc. Really it is urgent. I will be glad if someone helps me. Thanks in advance.

What is the present booted state of your device? Are you in twrp, or bootloader. Most of the time you can keep on pressing the power button. When it boots into a message about unlocked bootloader, press volume button to select recovery and it will boot into twrp

You should be able to boot in fastboot mode without recovery nor os, maybe your drivers are not working on windows? Try different usb ports, check if the display says "bootloader" or something. If nothing works try the usb shunt, this device is literally 'unbrickable' if it's working properly.

Watch this video(https://www.youtube.com/watch?v=DexLELi04XY) and then you will be able to detect your phone in your pc in qcom 9008 mode , then use qfil to flash ZUI firmware ,there are plenty of tutorials on the internet for that ,then follow the proper procedure mentioned in DotOs thread for flashing the new rom .
Hope it helped .

If you don't want to flash the firmware and all long process just follow the following steps
Enter in to the boot loader make sure you installed all the drivers in to pc then open cmd windows in adb fastboot folder and enters the following cmd into the cmd
Fastboot -i 0x2b4c devices this will detect your device
After that enter
Fastboot -i0x2b4c flash recovery recovery name.img
And boom you are good to go flash the rom of your choice and enjoy
For this process you need following files
Adb and fastboot devices
Drivers of zuk z2
Latest recovery and place revovery image file into the adb and fastboot folder if you are confused about anything pm me i am not the expert but i faced simillar problem and solved by this method

yashpatel1221 said:
If you don't want to flash the firmware and all long process just follow the following steps
Enter in to the boot loader make sure you installed all the drivers in to pc then open cmd windows in adb fastboot folder and enters the following cmd into the cmd
Fastboot -i 0x2b4c devices this will detect your device
After that enter
Fastboot -i0x2b4c flash recovery recovery name.img
And boom you are good to go flash the rom of your choice and enjoy
For this process you need following files
Adb and fastboot devices
Drivers of zuk z2
Latest recovery and place revovery image file into the adb and fastboot folder if you are confused about anything pm me i am not the expert but i faced simillar problem and solved by this method
Click to expand...
Click to collapse
This assumes u have upgraded bootloader to 4.4 kernal.
U can still boot into twrp.. When the phone is booting up press vol up key and select recovery.. From there boot into twrp. There select f2v or v2f .. Then flash twrp which u want to flash.. Reboot to recovery.. U will get promp no os installed.. Ignore and reboot to recovery . Then again d9 f2v or v2f depending on what rom to install.. Again reboot to recovery... Then flash rom of ur choice.
This procedure is needed when changing from vendor to factory and vice versa.

sanjay.2704 said:
This assumes u have upgraded bootloader to 4.4 kernal.
U can still boot into twrp.. When the phone is booting up press vol up key and select recovery.. From there boot into twrp. There select f2v or v2f .. Then flash twrp which u want to flash.. Reboot to recovery.. U will get promp no os installed.. Ignore and reboot to recovery . Then again d9 f2v or v2f depending on what rom to install.. Again reboot to recovery... Then flash rom of ur choice.
This procedure is needed when changing from vendor to factory and vice versa.
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Click to collapse
I don't understand what you are talking about as i say i am not some kind of technical expert i am here help regarding this i faced similar situation where i am not able to enter into recovery and also not able to enter into the os and when i restart the phone it automatically boot into fast boot mode what ever option i select and i solved my problem by this method

Can't enter fastboot

I can't enter fastboot mode with my oneplus 5T, it only boots into recovery. Android doesn't boot either.
I've tried pressing and holding the ‘Volume Up’, ‘Volume Down’, and ‘Power’ keys together to enter fastboot. Did not work.
ANY other combination/only powerbutton will just book into recovery.
I've also tried the following command while in twrp:
Code:
$ adb devices
List of devices attached
16a3gh14 recovery
$ adb reboot fastboot
Which again boots into recovery. Any ideas on how to get this working, much thanks!

luutoo said:
I can't enter fastboot mode with my oneplus 5T, it only boots into recovery. Android doesn't boot either.
I've tried pressing and holding the ‘Volume Up’, ‘Volume Down’, and ‘Power’ keys together to enter fastboot. Did not work.
ANY other combination/only powerbutton will just book into recovery.
I've also tried the following command while in twrp:
Code:
$ adb devices
List of devices attached
16a3gh14 recovery
$ adb reboot fastboot
Which again boots into recovery. Any ideas on how to get this working, much thanks!
Click to expand...
Click to collapse
You don't do adb in TWRP. If in TWRP it's reboot menu, you choose bootloader.

Tulsadiver said:
You don't do adb in TWRP. If in TWRP it's reboot menu, you choose bootloader.
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I can't get past the "decrypt data" screen in twrp thus I can't go to the reboot menu and choose bootloader. I want to flash the new version of twrp but not sure how to do it without bootloader.

luutoo said:
I can't get past the "decrypt data" screen in twrp thus I can't go to the reboot menu and choose bootloader. I want to flash the new version of twrp but not sure how to do it without bootloader.
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Click to collapse
You stated;
"I've also tried the following command while in twrp:"
This says you were in TWRP.
adb reboot bootloader gets you to fastboot. Not, adb reboot fastboot.

Tulsadiver said:
You stated;
"I've also tried the following command while in twrp:"
This says you were in TWRP.
adb reboot bootloader gets you to fastboot. Not, adb reboot fastboot.
Click to expand...
Click to collapse
Yes I were in twrp but, couldn't get past the decrypt screen.
Here is how it looks: imgur
One would think there would be a "cancel" button to bypass the decrypt but there are non.
Thank you! Don't know why I thought fastboot was the correct command... I've tried using the same button combinations for hours didn't work, this did!