Develop Bugs

[Q] Please help, P6 stuck at boot screen

A friend of mine as the same phone as me, the Huawei Ascend P6, and when she said hers was broken I said I would take a look. I have played around with flashing Android Roms etcetera, but I am totally stuck with this problem.
The problem is as follows: when booting the phone it shows the Huawei Ascend logo (as it should) for a couple of seconds, but then instead of the Huawei animation it shows the name "android" and gets stuck there (see attachment).
After some researching I put the UPDATE.APP file from the Huawei website in the dload folder on the root of the SD-card and tried rebooting. I tried a several times, but nothing happened.
Next I successfully booted in recovery mode but even when starting recovery the screen shows errors (see attachment):
Code:
E:failed to mount /cache (Invalid argument)
E:failed to mount /cache (Invalid argument)
ensure_path_mounted Failed
E:failed to mount /cache (Invalid argument
Installing a ZIP file, wipe cache and wipe data give even more errors.
So I thought I would try flashing through ADB/fastboot, and used the HuaweiUpdateExtractor tool to get the images. I can get manually in fastboot mode, but when I try to flash an image get the error
Code:
FAILED (remote: flash failure, ErrNo:2)
I tried using different files, USB ports, cables, linux and windows but nothing seems to help. Has anyone an idea what to do next?

it would help much to know what fw is / was flashed as last..
this android screen means to me that it should be a chinese / non international version..
if you enter fastboot mode and connect your phone to the pc make sure your pc recognizes the phone (for checking: fastboot devices - it should show you many "????")..if so try to install twrp (there are many threads about it)..then you might be able to install (through twrp) a repack of b513 or another version (but it has to be a repack)..
after that (and hopefully successful) you can try (use search) to change to an official fw again..
just my suggestion
hope you get a solution..

blueIBI said:
it would help much to know what fw is / was flashed as last..
this android screen means to me that it should be a chinese / non international version..
if you enter fastboot mode and connect your phone to the pc make sure your pc recognizes the phone (for checking: fastboot devices - it should show you many "????")..if so try to install twrp (there are many threads about it)..then you might be able to install (through twrp) a repack of b513 or another version (but it has to be a repack)..
after that (and hopefully successful) you can try (use search) to change to an official fw again..
just my suggestion
hope you get a solution..
Click to expand...
Click to collapse
Since I can not boot and it's not my own phone I have no clue what the version is
Luckily my PC recognizes the phone in fastboot (indeed with a weird name with a lot of ?), but I am not able to flash twrp because every time I try I get a FAILED response... Maybe the file I have is wrong. Could you point me to a thread about falshing twrp?

here is a guide for unlocking bootloader: http://forum.xda-developers.com/showthread.php?p=50724517
here is a twrp for JB roms: http://forum.xda-developers.com/showthread.php?p=47633501
here for KK roms: http://forum.xda-developers.com/showthread.php?p=51718302
maybe you need to unlock your bootloader at first

changes not working
Thanks for the links! I am able to flash an image, but for some reason my changes won't stick. When I boot in fastboot it says it is locked and I am able to unlock it, but everytime I reboot it is locked again. The same happens with twrp, I am able to flash the image but for some reason when I boot back into recovery nothing has changed.
My fastboot commands and output:
Code:
C:\Android>fastboot oem get-bootinfo
...
(bootloader) locked
OKAY [ 1.952s]
finished. total time: 1.952s
C:\Android>fastboot oem unlock UUUUUUUUUUUUUUUU
...
OKAY [ 0.012s]
finished. total time: 0.012s
C:\Android>fastboot oem get-bootinfo
...
(bootloader) unlocked
OKAY [ 0.001s]
finished. total time: 0.001s
C:\Android>fastboot flash recovery twrp_2_6_3_3_recovery.img
sending 'recovery' (8690 KB)...
OKAY [ 0.259s]
writing 'recovery'...
OKAY [ 0.390s]
finished. total time: 0.650s
Any idea?

hm..
in this case no..
i'm sorry..your friend should bring it to the service..that's the best advice for now..

blueIBI said:
hm..
in this case no..
i'm sorry..your friend should bring it to the service..that's the best advice for now..
Click to expand...
Click to collapse
That's what I was afraid of..
I think the unlock code doesn't work correctly on this phone for some reason, but I don't think I'll be able to get an unlock code specific for my device from Huawei, without serial number and such which I can't get since the phone doesn't boot.
I hope there is some warranty left...

Results
If anyone is interested (perhaps in the future), the phone was sent for repairs and is working again. They probably replaced the motherboard, but luckily it all fell under the warranty.
Thanks to blueIBI for trying to help!!

[Q] Error flashing factory images 5.0.2

Hello everyone.
I am having this error while trying to flash the latest factory image.
Adb and fastboot seem propoerly configured as I have adb devices and fastboot devices working.
sending 'bootloader' (3911 KB)...
FAILED (data transfer failure (Unknown error))
finished. total time 5.011s
rebooting into bootloader...
FAILED (status read failed ( Too many links))
finished. Total time: 117.384s
Any help would be appreciated, because I am lost on this one.
SDK is fully updated and doing everything as I did to flash 5.0.1
Thanks in advance.

Can't help with ADB or Fastboot but I can suggest dirty flashing this stock, rooted rom by scrosler found here: http://forum.xda-developers.com/nex.../rom-factory-stock-rooted-rom-lrx22g-t3004110 . Worked great for me. Good luck!

Mine failed the first couple of times too, but on the third attempt it went through. However, it turns out that I had failed to turn on the ADB bridge on the first one, and I guess it was still coming up on the second.

Adb has nothing to do with this. Fastboot is what's used when you're in the bootloader.
Have you tried a different cable/USB port?

yosmokinman said:
Adb has nothing to do with this. Fastboot is what's used when you're in the bootloader.
Have you tried a different cable/USB port?
Click to expand...
Click to collapse
Very true, except that it uses adb to initially reboot the tablet into fastboot mode.
It would probably skip that step if you were already in fastboot mode, but if the OS is running, the flash-all script will attempt to restart the device by running adb reboot bootloader.
That said, if ADB isn't working, checking the cable and drivers is the next step.

Getting into the bootloader doesn't require adb. Use the hardware buttons.

Fastboot stuck, no recovery

Hello,
i have big problem wiht my D855. I'm trying to install recovery on my device via fastboot, because flashify method failed resulting in lack of recovery on my phone... When i enter "the place where recovery should be" boot certification error shows up and the only way to get rid of it is to re-insert the battery. Unfortunatelly fastboot is not working somehow. Command where it stuck while flashing says:
Code:
C:\adb\fastboot flash recovery reco.img
target reported max download size of 214743648 bytes
sending 'recovery' (15382 KB)...
OKAY [ 0.557s]
writing 'recovery'...
device:
Code:
[132740] fastboot: flash:recovery
Ive been already waiting about 40 minutes for this process to continue but of course nothing happened. After removing USB cable it says:
Code:
FAILED (status read failed (Too many links))
finished. total time: 649.362s
Other commands also do not work, they crash almost the same way but with sh.. i called "three dot bug"
Code:
C:\Users\Dom\Desktop\2>fastboot flashing unlock
...
It even dont reboot after typing:
Code:
C:\Users\Dom\Desktop\2>fastboot reboot-bootloader
rebooting into bootloader...
I have tried different cables, USB ports, different PC. I have lates LG drivers installed. What can I do. My OS is running but has many issues like not working wifi, crashing camera or random reboots (on new battery), so I cant use this phone anymore. It is impossible to revert it back to factory because recovery, which is used for this process is not working, so do fastboot...
Please help, I'm not android expert (and poor english user).
Cheers

Flash the latest TWRP onto it, it should let you boot. I had this problem a few days ago on a samsung tablet. I used odin on that. But you are going to have to match up the TWRP version and the android version you are running.
If you get TWRP working you wont have any problems, you can fix everything from there. Flash fulmics, unroot, what ever you want. Wipe the whole device ect. Make your goal trying to get TWRP on it.

Well, the problem is that I'm trying to flash TWRP now, it is the "reco.img" file, because I was trying to resolve the recovery instalation problem by changing name of file, which could be a problem somehow.
I found adb method to flash recovery:
Code:
adb shell
su
dd if=/dev/zero of=/dev/block/platform/msm_sdcc.1/by-name/recovery
dd if=/sdcard/yourrecovery.img of=/dev/block/platform/msm_sdcc.1/by-name/recovery
Will it work? ADB is working fine, I already tried similar method when removing and reinstalling laf.

TWRP Not Installing or booting through fastboot (MIUI 10.2.2.0)

Hello everyone
I have been trying to install TWRP through every fastboot method that I can and it is failing everytime.
Code:
PS C:\adb> fastboot devices
******** fastboot
PS C:\adb> fastboot boot twrp.img
downloading 'boot.img'...
FAILED (command write failed (Invalid argument))
finished. total time: 0.002s
PS C:\adb> fastboot flash antirbpass dummy.img
sending 'antirbpass' (8 KB)...
FAILED (status read failed (Too many links))
finished. total time: 2.032s
PS C:\adb>
After every failed command I get 'Switch off phone using power key' on top left of the bootloader screen and I have to reboot it into bootloader again. I have also tried 'fastboot flash recovery twrp.img' but nothing happens. I had this problem with MIUI 10.2.1.0 as well so I waited for an update thinking that might solve it. My phone is unlocked, all the drivers are properly installed and I have tried all different USB ports and original Mi cable but it fails everytime.
Does anyone have any solution?
Thank you

First of all, have you unlocked your device?

Please use other USB ports and Original mi cable

Ducatuca said:
First of all, have you unlocked your device?
Click to expand...
Click to collapse
Yes, it is unlocked and I have installed TWRP before using this method lot of times on this phone.

bhimrdx said:
Please use other USB ports and Original mi cable
Click to expand...
Click to collapse
I have used every different USB port, original Mi cable and other cable as well but it doesnt work. All the drivers are properly installed as well.

pawas99 said:
Yes, it is unlocked and I have installed TWRP before using this method lot of times on this phone.
Click to expand...
Click to collapse
Are you sure you have downloaded proper twrp.img file ?? Try using other custom recovery like orange fox

I have the same problem, updated to 10.2.2.0 I can't install the twrp

uninstall your adb drivers and then install them again and reboot your pc and try to run all commands again it will work

Same Problem with MIUI 12 on POCO F1
I too get a black screen whenever i try fastboot commands. please help.

pawas99 said:
Hello everyone
I have been trying to install TWRP through every fastboot method that I can and it is failing everytime.
After every failed command I get 'Switch off phone using power key' on top left of the bootloader screen and I have to reboot it into bootloader again. I have also tried 'fastboot flash recovery twrp.img' but nothing happens. I had this problem with MIUI 10.2.1.0 as well so I waited for an update thinking that might solve it. My phone is unlocked, all the drivers are properly installed and I have tried all different USB ports and original Mi cable but it fails everytime.
Does anyone have any solution?
Thank you
Click to expand...
Click to collapse
Try usb Hub
---------- Post added at 11:03 AM ---------- Previous post was at 11:02 AM ----------
Sidgup1998 said:
Try usb Hub
Click to expand...
Click to collapse
Or Type fastboot devices hit enter, then again type the same command, if it shows like this ???????? Then try usb hub

Bricked? Bootloop to TWRP > Stuck on TWRP Logo > Fastboot not recognized > No way out?

Hope you guys can give me a hand and get me out of this situation...
What I am using
Xiaomi Redmi Note 5 Pro with:
- Pixel Experience Rom
- TWRP 3.5.2_9
Windows 10 21H1 x64
What happend
- Updating Pixel Experience Rom failed
Downloaded update
Booted into Recovery (battery 85%)
Recovery stuck on Logo
After 30m I tried to reboot to system (thinking update failed or never started)
Reboot in to Recovery
Stuck on Logo
What I tried
- I tried XiaomiFastBootADBTools (latest version)
Device is recognized in Recovery mode
In recovery I can't do anything
Rebooting to System from here results in reboot into Recovery
Booting to fastboot works, but device is not recognized
Re-installed drivers, but no luck
Still recognized in Recovery mode
Still NOT recognized in Fastboot mode
Windows Device Manager > The drivers for this device are not installed. (Code 28)
And turning of phone is not possible, just goes back to Recovery
Don't know what else to do. I have installed all the drivers I could find. Even used Snappy Driver, but nothing seems to do the trick when the phone goes into Fastboot mode. PC just doesn't recognize it.
So can't do anything in Recovery mode; just watching the TWRP logo.
And device is not recognized in fastboot mode; forgot usb debugging?
And can't boot into system to change that, because of bootloop to Recovery.
So, am I **** out of luck and bricked my phone?

While in Recovery mode (when the phone is still recognized) type in adb window the command - adb reboot bootloader. Phone should boot to Fastboot mode and see if it's still recognized.

zaqm said:
While in Recovery mode (when the phone is still recognized) type in adb window the command - adb reboot bootloader. Phone should boot to Fastboot mode and see if it's still recognized.
Click to expand...
Click to collapse
Yeah, that works. Same as with XiaomiADBFastbootTools. But after that the problem starts (remains).
When I get into Fastboot the Device Manager shows the phone as Other Devices > Android with an exclamation mark and the message that the drivers are not installed. I'm missing a driver, but I don't know which one. Guessing Xiaomi USB driver? Finally fixed that issue with another round of googling. I read that you just need net "Mi unlock Tool". So tyring to find that one:
- https://en.miui.com/unlock/download_en.html
results in a download that doesn't contain the files needed.... No driver_install and no miflash_unlock.exe etc.
pretty weird, found another page https://c.mi.com/thread-2262302-1-0.html with previous versions
- 4.5.813.51 won't download... really xiaomi, your site sucks.
- 4.5.707.49 finally downloads and seems to work.
So updated the driver by pointing to that folder. Worked like a charm.
Opening Minimal ADB and Fastboot (XiaomiADBFastboottools didn't recognize phone once in fastboot).
- adb reboot bootloader > success
- fastboot flash recovery 'recovery_file_location' > error
target reported max download size of 536870912 bytes
sending 'recovery' (47140 KB)...
FAILED (remote: Requested download size is more than max allowed
)
finished. total time: 0.004s
Tried both latest TWRP and Orangefox. Same message each time.
Tried an older/smaller TWRP 3.3.1 and got a different but still similar message
target didn't report max-download-size
sending 'recovery' (38924 KB)...
FAILED (remote: Requested download size is more than max allowed
)
finished. total time: 0.004s
Tried it with Platform-Tools
- adb reboot bootloader
- fastboot boot 'recovery_file_location'
Which results in
Sending 'boot.img' (43884 KB) FAILED (Write to device failed (Invalid argument))
fastboot: error: Command failed
OR
Sending 'boot.img' (43884 KB) FAILED (Write to device failed (Too many links))
fastboot: error: Command failed
AND eventually
Sending 'boot.img' (43884 KB) FAILED (Write to device failed (no link))
fastboot: error: Command failed
2 hours in, calling it a day for now.

FlashyDuck said:
Yeah, that works. Same as with XiaomiADBFastbootTools. But after that the problem starts (remains).
When I get into Fastboot the Device Manager shows the phone as Other Devices > Android with an exclamation mark and the message that the drivers are not installed. I'm missing a driver, but I don't know which one. Guessing Xiaomi USB driver? Finally fixed that issue with another round of googling. I read that you just need net "Mi unlock Tool". So tyring to find that one:
- https://en.miui.com/unlock/download_en.html
results in a download that doesn't contain the files needed.... No driver_install and no miflash_unlock.exe etc.
pretty weird, found another page https://c.mi.com/thread-2262302-1-0.html with previous versions
- 4.5.813.51 won't download... really xiaomi, your site sucks.
- 4.5.707.49 finally downloads and seems to work.
So updated the driver by pointing to that folder. Worked like a charm.
Opening Minimal ADB and Fastboot (XiaomiADBFastboottools didn't recognize phone once in fastboot).
- adb reboot bootloader > success
- fastboot flash recovery 'recovery_file_location' > error
target reported max download size of 536870912 bytes
sending 'recovery' (47140 KB)...
FAILED (remote: Requested download size is more than max allowed
)
finished. total time: 0.004s
Tried both latest TWRP and Orangefox. Same message each time.
Tried an older/smaller TWRP 3.3.1 and got a different but still similar message
target didn't report max-download-size
sending 'recovery' (38924 KB)...
FAILED (remote: Requested download size is more than max allowed
)
finished. total time: 0.004s
Tried it with Platform-Tools
- adb reboot bootloader
- fastboot boot 'recovery_file_location'
Which results in
Sending 'boot.img' (43884 KB) FAILED (Write to device failed (Invalid argument))
fastboot: error: Command failed
OR
Sending 'boot.img' (43884 KB) FAILED (Write to device failed (Too many links))
fastboot: error: Command failed
AND eventually
Sending 'boot.img' (43884 KB) FAILED (Write to device failed (no link))
fastboot: error: Command failed
2 hours in, calling it a day for now.
Click to expand...
Click to collapse
What about trying to flash latest fastboot rom with MiFlash since fastboot now works?

Absolutely awesome! We did it!
I'm no expert in all this, so I had to use a guide to flash a fastboot rom with the Mi Flash Tool. I used this guide: https://www.thecustomdroid.com/install-miui-fastboot-rom-using-miflash-tool-xiaomi/
That was all straight forward untill I came to step 6; flashing the actual rom with the Mi Flash Tool.
The tool just wouldn't recognize my phone when in Fastboot mode. Even after the driver install popup.
- after pressing refresh phone disconnected.
- tried 3 different usb ports (read online that this could be the issue)
- tried 3 different cables...
The third cable (Ugreen cable) worked! Although it only worked on a usb 3.0 port strangely enough.
I used the "clean all" option and flashed the latest MIUI global fastboot rom for the RMN5.
Flashing process was a bit strange, because the tool didn't provide me with the same information shown in the guide, but it flashed a couple of things to 100% completeness and after that it kept counting up and showing $pause. Not much later the phone started to boot into MIUI and everything was normal.
Enabled dev options and usb debugging.
Re-flashed latest twrp recovery just to be sure.
And it's all working fine again.
Really, thank you for your help! It's much appreciated!

FlashyDuck said:
Absolutely awesome! We did it!
I'm no expert in all this, so I had to use a guide to flash a fastboot rom with the Mi Flash Tool. I used this guide: https://www.thecustomdroid.com/install-miui-fastboot-rom-using-miflash-tool-xiaomi/
That was all straight forward untill I came to step 6; flashing the actual rom with the Mi Flash Tool.
The tool just wouldn't recognize my phone when in Fastboot mode. Even after the driver install popup.
- after pressing refresh phone disconnected.
- tried 3 different usb ports (read online that this could be the issue)
- tried 3 different cables...
The third cable (Ugreen cable) worked! Although it only worked on a usb 3.0 port strangely enough.
I used the "clean all" option and flashed the latest MIUI global fastboot rom for the RMN5.
Flashing process was a bit strange, because the tool didn't provide me with the same information shown in the guide, but it flashed a couple of things to 100% completeness and after that it kept counting up and showing $pause. Not much later the phone started to boot into MIUI and everything was normal.
Enabled dev options and usb debugging.
Re-flashed latest twrp recovery just to be sure.
And it's all working fine again.
Really, thank you for your help! It's much appreciated!
Click to expand...
Click to collapse
Glad that it worked out. Sometimes even the most untraditional methods work like usb 3.0 and the third cable.
Still all went good and that's the good news. Enjoy

--double, woops--

zaqm said:
Glad that it worked out. Sometimes even the most untraditional methods work like usb 3.0 and the third cable.
Still all went good and that's the good news. Enjoy
Click to expand...
Click to collapse
Unfortunately, the problem has returned.
The first time flashing Orange Fox Recovery was no problem. I could boot to Recovery. I installed Pixel Experience Plus again. That all worked fine.
Today I wanted to try out ArrowOS. And this is what I did:
- loaded the .zip file on the phone
- turned off the phone
- booted into recovery
- stuck on recovery logo screen...
- after this the phone bootloops to recovery again as before...
In Recovery and Fastboot the phone is still recognized by the PC. But in Recovery I can't do anything.
So in Fastboot mode I tried re-flashing Orange Fox , but same result. Flashing seems successful but can't get past the Recovery logo. I even tried flashing TWRP, but also same result.
I can probably redo all the steps in my previous post, but once I boot to recovery the phone is done for it seems.
Any ideas?

FlashyDuck said:
Unfortunately, the problem has returned.
The first time flashing Orange Fox Recovery was no problem. I could boot to Recovery. I installed Pixel Experience Plus again. That all worked fine.
Today I wanted to try out ArrowOS. And this is what I did:
- loaded the .zip file on the phone
- turned off the phone
- booted into recovery
- stuck on recovery logo screen...
- after this the phone bootloops to recovery again as before...
In Recovery and Fastboot the phone is still recognized by the PC. But in Recovery I can't do anything.
So in Fastboot mode I tried re-flashing Orange Fox , but same result. Flashing seems successful but can't get past the Recovery logo. I even tried flashing TWRP, but also same result.
I can probably redo all the steps in my previous post, but once I boot to recovery the phone is done for it seems.
Any ideas?
Click to expand...
Click to collapse
Hmm, I don't know why is that happening. It's usually the custom recovery's fault in such case except if Pixel rom comes with its own prebuilt recovery that overwrites the one you installed.
I suggest you first to try to boot into system to see if it will work - in fastboot mode type the command fastboot reboot.
If this doesn't work then flash again fastboot rom to get the phone in working condition and after installing twrp FORMAT DATA in twrp Wipe section. Then install rom again.
Good luck, zaqm!

zaqm said:
Hmm, I don't know why is that happening. It's usually the custom recovery's fault in such case except if Pixel rom comes with its own prebuilt recovery that overwrites the one you installed.
I suggest you first to try to boot into system to see if it will work - in fastboot mode type the command fastboot reboot.
If this doesn't work then flash again fastboot rom to get the phone in working condition and after installing twrp FORMAT DATA in twrp Wipe section. Then install rom again.
Good luck, zaqm!
Click to expand...
Click to collapse
It worked!
Don't know why, but it's working. Here's what I did:
- In Fastboot Mode > fastboot reboot > booted to recovery, so no luck there
- Used MiFlash to flash the fastboot rom again (clean all)
- Setup the phone etc. and activated usb debugging
- Flashed TWRP
- Booted to TWRP
- Format Data
- Rebooted to TWRP
- Mounted Storage, uploaded ArrowOS.zip and installed it
- Wiped Dalvik/Cache
- Booted ArrowOS, and success!
Have done several reboots to (and from) system/recovery and it just works again, as it should.
I think the Format Data in TWRP did the trick. I remember in Orange Fox this all was a bit unclear; I'm just not used to Orange Fox, always used TWRP. So my bad for not correctly flashing the rom probably.
Again, thank you very much for your help! Have a great day! And let's hope this is the end of this issue haha.

FlashyDuck said:
It worked!
Don't know why, but it's working. Here's what I did:
- In Fastboot Mode > fastboot reboot > booted to recovery, so no luck there
- Used MiFlash to flash the fastboot rom again (clean all)
- Setup the phone etc. and activated usb debugging
- Flashed TWRP
- Booted to TWRP
- Format Data
- Rebooted to TWRP
- Mounted Storage, uploaded ArrowOS.zip and installed it
- Wiped Dalvik/Cache
- Booted ArrowOS, and success!
Have done several reboots to (and from) system/recovery and it just works again, as it should.
I think the Format Data in TWRP did the trick. I remember in Orange Fox this all was a bit unclear; I'm just not used to Orange Fox, always used TWRP. So my bad for not correctly flashing the rom probably.
Again, thank you very much for your help! Have a great day! And let's hope this is the end of this issue haha.
Click to expand...
Click to collapse
Maybe some glitch of OrangeFox recovery and yeah, let's hope that this issue won't appear anymore.
All the best, zaqm!