Unrecoverable bootloader error but not Bricked!

[gianlu76]

If you mean the Android keeling over, no, that's normal. Follow the steps outlined in the thread I linked to for flashing the firmware from the microSD

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---------- Post added at 07:43 AM ---------- Previous post was at 07:11 AM ----------


What recovery do you have now?
If you cannot get a fastboot connection your only option would be to flash either bootloader and recovery in your current recovery (assuming it even works...) or flash the Asus stock firmware and start from scratch.
Check the OP of the CROMi-X, Omni rom and ZOMBi-Pop threads. lj, sbdags & Co at some point posted recovery flashable bootloader /recover packages you can use.
Or download the Asus firmware, unzip it once and flash the resulting zip in recovery.
If your current recovery works, that should get you back on a total stock system.

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I had TWRP but I don't remember which version. Thw problem is I can't access to old twrp recovery, I can access only in stock recovery (three icons) with the message error. I can't install any new recovery over this corrupt recovery because fastboot doesn't work on TF300T. First, I think I need to know the correct version of recovery to install, then, understand how to install.

Inviato dal mio ONEPLUS A3003 utilizzando Tapatalk

 

[Sindee75]

Nice? Nice does not begin to cover it!
FWUL is friggin awesome! Just prepped a USB drive myself and connected 4 Android devices one after the other without rebooting, without any fuss.
And for all of them I had adb in Android, adb in recovery and fastboot. This is the first time that I had adb in recovery for my TF701 - never got that to work in Windows.
@Sindee75 you still around? This is the answer to your troubles!!!

I surprised myself. I figured out how to do the FWUL and booted from a Usb! In lunix, problems are similar.. when I issue fastboot erase system, it just sits and does nothing instead of saying "waiting on any device".. adb devices does show recovery. In file manager you can see my Transformer tablet, but you can't access it as it won't mount then at some point I get an error "unable to open MTP device usb:001,17"..

does this help to figure out my problem??????

 

[berndblb]

I had TWRP but I don't remember which version. Thw problem is I can't access to old twrp recovery, I can access only in stock recovery (three icons) with the message error. I can't install any new recovery over this corrupt recovery because fastboot doesn't work on TF300T. First, I think I need to know the correct version of recovery to install, then, understand how to install.

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We gave to get terminology straight here: When you are on the screen with 3 icons you are in the bootloader and fastboot mode, not recovery. You access recovery from there by pushing Vol up on the flashing RCK icon.
When in fastboot what do you get from 'fastboot devices'?
There are only three ways to flash a recovery (well... 4 ways, but I don't count apps like Flashify...)
In fastboot
In your current recovery
With dd command if you have adb in recovery

So,
find out if you have one of the above. Either fastboot or adb when you boot to recovery. Doesn't matter if you get stuck on the TWRP screen. Try it anyway.

---------- Post added at 05:57 PM ---------- Previous post was at 05:52 PM ----------

I surprised myself. I figured out how to do the FWUL and booted from a Usb! In lunix, problems are similar.. when I issue fastboot erase system, it just sits and does nothing instead of saying "waiting on any device".. adb devices does show recovery. In file manager you can see my Transformer tablet, but you can't access it as it won't mount then at some point I get an error "unable to open MTP device usb:001,17"..

does this help to figure out my problem??????

What return do you get from fastboot devices?
What return do you get using the ls /sdcard / command?
Go slow, go methodically



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[gianlu76]

We gave to get terminology straight here: When you are on the screen with 3 icons you are in the bootloader and fastboot mode, not recovery. You access recovery from there by pushing Vol up on the flashing RCK icon.
When in fastboot what do you get from 'fastboot devices'?
There are only three ways to flash a recovery (well... 4 ways, but I don't count apps like Flashify...)
In fastboot
In your current recovery
With dd command if you have adb in recovery

So,
find out if you have one of the above. Either fastboot or adb when you boot to recovery. Doesn't matter if you get stuck on the TWRP screen. Try it anyway.

You are right berndblb, I'm sorry. My current recovery is not available (could better say previous recovery), I can access only in bootloader mode but in this case fastboot doesn't available. If I use "fastboot devices" on my pc I give any response from tablet. The tablet turn on normaly with kitkass rom but not in recovery.

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[berndblb]

Well, do you have adb access when Android is running?

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[Nektopoli]

Well, do you have adb access when Android is running?

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Can he flash a new recovery console using the Terminal Emulator while in Android?

NP

 

[berndblb]

Yes, he can flash it to the staging partition, reboot and the bootloader should do the rest

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[Sindee75]

We gave to get terminology straight here: When you are on the screen with 3 icons you are in the bootloader and fastboot mode, not recovery. You access recovery from there by pushing Vol up on the flashing RCK icon.
When in fastboot what do you get from 'fastboot devices'?
There are only three ways to flash a recovery (well... 4 ways, but I don't count apps like Flashify...)
In fastboot
In your current recovery
With dd command if you have adb in recovery

So,
find out if you have one of the above. Either fastboot or adb when you boot to recovery. Doesn't matter if you get stuck on the TWRP screen. Try it anyway.

---------- Post added at 05:57 PM ---------- Previous post was at 05:52 PM ----------



What return do you get from fastboot devices?
What return do you get using the ls /sdcard / command?
Go slow, go methodically



Sent from my Nexus 5X using Tapatalk

Same problem in linux/fwul. I open the easy adb icon. Click adb tab, select adb devices on menu, then select activate. It show device number and recovery. I select fastboot tab, then fastboot devices and nothing happens. Just sits.. the ls /sdcard/ command says invalid path or something like that.
I only have usb 3.0 ports, could this be my issue? Thanks!

 

[gianlu76]

Well, do you have adb access when Android is running?

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adb devices
List of devices attached
* daemon not running. Starting it on port 5837*
* daemon started successfully *
015d15b4dd5c1c05 devices

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[Nektopoli]

I use Minimal ADB and Fastboot and even though my laptop (with 3.0 USB) didn't recognize my TF I was still able to send it commands and is was able to execute them. Try sending the tablet reboot command.

NP

 

[Sindee75]

adb devices
List of devices attached
* daemon not running. Starting it on port 5837*
* daemon started successfully *
015d15b4dd5c1c05 devices

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When I type adb devices it shows like a serial number and says recovery next to it..

 

[Nektopoli]

When I type adb devices it shows like a serial number and says recovery next to it..

Send the TF the reboot command and is if it follows it.

NP

 

[Sindee75]

Send the TF the reboot command and is if it follows it.

NP

Nothing happens.....

 

[gianlu76]

Well, do you have adb access when Android is running?

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@berndblb Please help me

 

[Sindee75]

Send the TF the reboot command and is if it follows it.

NP

Nothing happens when sending the reboot bootloader command via adb or fastboot commands.

 

[berndblb]

@berndblb Please help me

Ok, sorry - it's been crazy around here.
I do not like one bit that you do not have fastboot access in the bootloader and somehow suspect something else is going on, but I cannot make sense of it...

So you have adb in Android.
Make sure you are flashing the correct recovery this time, ok?
Rename the downloaded recovery image to twrp.img and place it into the root of your internal memory on the tablet. That is the same level where your Pictures and Documents folder are too. Do not put it into any folders, just into the root level of /sdcard
Then issue these commands:

adb shell
su
dd if=/sdcard/twrp.img of=/dev/block/mmcblk0p4

Then reboot the tablet normally. Turn it off again and now boot into recovery and check if it is accessible.
Best is probably that you copy and paste the dd command. Please make sure you type it correctly, especially the last bit: That's mmcblk"zero"p4

 

[gianlu76]

Ok, sorry - it's been crazy around here.
I do not like one bit that you do not have fastboot access in the bootloader and somehow suspect something else is going on, but I cannot make sense of it...

So you have adb in Android.
Make sure you are flashing the correct recovery this time, ok?
Rename the downloaded recovery image to twrp.img and place it into the root of your internal memory on the tablet. That is the same level where your Pictures and Documents folder are too. Do not put it into any folders, just into the root level of /sdcard
Then issue these commands:

adb shell
su
dd if=/sdcard/twrp.img of=/dev/block/mmcblk0p4

Then reboot the tablet normally. Turn it off again and now boot into recovery and check if it is accessible.
Best is probably that you copy and paste the dd command. Please make sure you type it correctly, especially the last bit: That's mmcblk"zero"p4

After work I'll try. The problem maybe is understand the correct version of TWRP to install. On KitKass lollipop thread speack about TWRP 2.8, I'll try to install this version.
Your help is precious.

 

[gianlu76]

After work I'll try. The problem maybe is understand the correct version of TWRP to install. On KitKass lollipop thread speack about TWRP 2.8, I'll try to install this version.
Your help is precious.

This is what I did:
[email protected]:/ # su
[email protected]:/ # dd if=/sdcard/twrp.img of=/dev/block/mmcblk0p4
14252+1 records in
14252+1 records out
7297128 bytes transferred in 9.526 secs (766022 bytes/sec)

Reboot system.
Turn off tablet.
Turn on tablet in fastboot mode.
Same message "unrecoverable..........". I can only reboot system and access to android.

P.S.
I downloaded kang TWRP https://forum.xda-developers.com/transformer-tf300t/development/recovery-twrp-t3046479

 

[gianlu76]

@berndblb I've done :laugh::laugh:
How? please don't kill me....I just plugged the tablet to another usb port :angel:
Changing usb port I had access to fastboot command and following post #12.
Sorry if I did not waste time....if you come in Italy you are invited to my house in Tuscany

 

[Sindee75]

@berndblb I've done :laugh::laugh:
How? please don't kill me....I just plugged the tablet to another usb port :angel:
Changing usb port I had access to fastboot command and following post #12.
Sorry if I did not waste time....if you come in Italy you are invited to my house in Tuscany

I have read on this forum and others fastboot doesn't work on many usb 3.0 ports. That's all I have. Did you by any chance switch to a Usb 2.0 port? Cindy