Hey guys,
So I recently did the procedure to enable NVflash on my TF700, and flashed the AndroidRoot bootloader in the process (over my stock .26). Unfortunately, I forgot to make a backup of the bootloader before doing that.
My question is, is there any way I can get back to a stock .26 bootloader now? A bootloader image file I can download somewhere? I want to do so to get back to stock .26 firmware and then upgrade to stock Jellybean.
Thanks
I'm really curious as to *why* you'd want to do this... If you just want to get to Jelly Bean with the stock bootloader, you can download the full JB firmware from Asus now (it's a FULL install, not just an upgrade like the OTA was) - it will replace the bootloader as well.
I just can't think of any valid reason to revert to the .26 bootloader just to get to get back to the stock bootloader in order to upgrade to JellyBean/stock bootloader.
Sent from my ASUS Transformer Pad TF700T using Tapatalk 2
So can I just run the Jellybean installer to return my tablet to stock (keeping bootloader unlocked of course)?
By the way I have TWRP recovery. So I need to change to stock recovery first to run that file, right?
dark42 said:
So can I just run the Jellybean installer to return my tablet to stock (keeping bootloader unlocked of course)?
By the way I have TWRP recovery. So I need to change to stock recovery first to run that file, right?
Click to expand...
Click to collapse
Actually, just installing the stock JB image from Asus will replace your bootloader and your recovery, so no need to change to stock recovery first...
Sent from my ASUS Transformer Pad TF700T using Tapatalk 2
jtrosky said:
Actually, just installing the stock JB image from Asus will replace your bootloader and your recovery, so no need to change to stock recovery first...
Sent from my ASUS Transformer Pad TF700T using Tapatalk 2
Click to expand...
Click to collapse
But I can't find a way to run the ASUS update, since I have TWRP recovery (seems like it requires a stock recovery)... If I start the update from within Android, it just takes me to TWRP. How do I run the file?
Never mind, I just tried installing the ASUS update file from within TWRP, to my great surprise it worked! I thought it was going to brick my tablet, honestly (I have an NVflash backup so no worries). Well, I'm happy, thanks for your help, jtrosky.
Related
I just picked up a tf300t and I wanted to make sure of something before I dive into rooting, roms, etc. Is it possible to return it completely to a stock, non rooted, no custom recovery? Depending when the asus infinity comes out, I may want to return the tf300t for it. Please answer asap, so I can get started on everything
You can root and un root so thats not a problem, But if you unlock the boot loader your out of luck. There is no way to relock it. So even if you flashed a stock recovery and rom the warranty is void.
ok well at least i can root it. Then when my 30 days are up, ill start tossing roms on there
xFaultx said:
ok well at least i can root it. Then when my 30 days are up, ill start tossing roms on there
Click to expand...
Click to collapse
Well actually you have 1 year warranty with the manufacturer (ASUS).
xFaultx said:
ok well at least i can root it. Then when my 30 days are up, ill start tossing roms on there
Click to expand...
Click to collapse
i'm pretty sure you can still return the tablet with a unlocked bootloader to the store. what you can't do while unlocked is use asus warranty.
Sent from my ASUS Transformer Pad TF300T
I am trying to go back to stock also, coming from Cyanogen mod. I tried this method desrcibed here --> http://forum.xda-developers.com/showthread.php?t=1668173 But all I get is Asus boot screen. I also tried using CWM but does not work either.
phoenixflames said:
I am trying to go back to stock also, coming from Cyanogen mod. I tried this method desrcibed here --> http://forum.xda-developers.com/showthread.php?t=1668173 But all I get is Asus boot screen. I also tried using CWM but does not work either.
Click to expand...
Click to collapse
try flashing cmw again.
Sent from my ASUS Transformer Pad TF300T
atomicblue said:
try flashing cmw again.
Sent from my ASUS Transformer Pad TF300T
Click to expand...
Click to collapse
Everytime I flash to the stock rom, CWM goes away and it returns to to the android on his back logo. Therefore I have to put CWM back on it again.
phoenixflames said:
Everytime I flash to the stock rom, CWM goes away and it returns to to the android on his back logo. Therefore I have to put CWM back on it again.
Click to expand...
Click to collapse
If your flashing the firmware from asus's website, it will overwrite your recovery.
you could try using blobtools to repack the asus firmware file without the recovery and bootloader partitions, then flash it
http://forum.xda-developers.com/showthread.php?t=1068548
(I've compiled blob tools using mingw and attached it for your convienience)
I don't know if it will work because I haven't unlocked my tf300t yet (I have to RMA it because of a screen defect), but worth a shot.
my English is poor,apologize
I have a tf300t(bought from US,I am a chinese),it isn't unlocked until update to stock JB(i update to 4.1.1from OTA,locked),but after unlocked,I flash the CWM 5.5.0.4,but it didn't work.Then i flash the TWRP 2.2.1.3 for JB only(http://forum.xda-developers.com/showthread.php?t=1843694),it worked.But after i flash the fireware "ASUS-ICS-HYDRO-PONIC"(http://forum.xda-developers.com/showthread.php?t=1750861),after reboot,the device hanged at the asus logo for a long time(i watched it for even 10 minutes.....),so i tried the stock rom(download from ASUS site,US_epad-user-9.4.3.30.zip)but it didn't word too.Now my tf300t can't boot to the OS,it only can get into the recovery(TWRP2.2.1.3 for JB).somebody help me......,I wonder if it is the update from OTA to cause my problem)
There are others in the same situation. Keep watch on this thread http://forum.xda-developers.com/showthread.php?p=30516010
And others. There should be a fix soon to downgrade back to ICS and start over. Hang in there and be patience. At least you can get into TWRP so there's still hope.
Sent from my Nexus S 4G using Tapatalk 2
DMardroid said:
There are others in the same situation. Keep watch on this thread http://forum.xda-developers.com/showthread.php?p=30516010
And others. There should be a fix soon to downgrade back to ICS and start over. Hang in there and be patience. At least you can get into TWRP so there's still hope.
Sent from my Nexus S 4G using Tapatalk 2
Click to expand...
Click to collapse
thanks a lot,i think i must be patient for a while.just like you said,i can get into TWRP,there is still hope.
jijitax4 said:
...it isn't unlocked until update to stock JB(i update to 4.1.1from OTA,locked),but after unlocked...
Click to expand...
Click to collapse
So you used unlock tool on JB, and it worked?
That's handy to know anyways...
mozyman said:
So you used unlock tool on JB, and it worked?
That's handy to know anyways...
Click to expand...
Click to collapse
yes it worked,my tf300t is unlocked,there is the word"this device is unlocked" on the asus logo screen.but it can't load os.
So I wonder if maybe you would have luck wiping and trying to install a jb based ROM like cm10? Since you're already on jb firmware its understandable that an ICS ROM fails... I'm by no means an expert but just someone considering an unlock after JB ota
Sent from my ASUS Transformer Pad TF300T using xda app-developers app
Looks like partition sizes chaged with the Asus update. I couldn't flash CM10 or any other rom as well (signature mismatch). If you installed the official 4.1.1 update, you need to manually install it again. Older versions and rollbacks wont work unless you push to some trickery mmcblk0p4, but that's another thread in itself
Download the JB update from Asus's website (if you still have it, that's fine) and extract the blob file. Put the blob file in teh same directory as your fastboot. Boot your TF300 into bootloader and enter:
fastboot -i 0x0B05 flash system blob
It will take a while to install, so be patient. Hope this helps
zeiroe said:
Looks like partition sizes chaged with the Asus update. I couldn't flash CM10 or any other rom as well (signature mismatch). If you installed the official 4.1.1 update, you need to manually install it again. Older versions and rollbacks wont work unless you push to some trickery mmcblk0p4, but that's another thread in itself
Download the JB update from Asus's website (if you still have it, that's fine) and extract the blob file. Put the blob file in teh same directory as your fastboot. Boot your TF300 into bootloader and enter:
fastboot -i 0x0B05 flash system blob
It will take a while to install, so be patient. Hope this helps
Click to expand...
Click to collapse
thanks a lot!!! it worked! i can enter the OS jb again!,thank you very much!Hope this can help others just like me.
but there is another question,can i flash other fireware like cm10 or downgrade the TF300T now?I do not like the JB OS,it is bed support on flash video.I need it.
jijitax4 said:
thanks a lot!!! it worked! i can enter the OS jb again!,thank you very much!Hope this can help others just like me.
but there is another question,can i flash other fireware like cm10 or downgrade the TF300T now?I do not like the JB OS,it is bed support on flash video.I need it.
Click to expand...
Click to collapse
Not yet. This fix is in the works. The new custom recoveries need to be modified for OTA JB first. Keep an eye on the development threads.
Sent from my Amazon Kindle Fire using Tapatalk 2
So if you put all these steps together...
1. Update to JB using OTA
2. Unlock
3. Flash TWRP
4. Flash extracted blob
You have an unlock/custom recovery method for those of us on JB am I correct?
Sent from my ASUS Transformer Pad TF300T using xda app-developers app
TheAdamizer said:
So if you put all these steps together...
1. Update to JB using OTA
2. Unlock
3. Flash TWRP
4. Flash extracted blob
You have an unlock/custom recovery method for those of us on JB am I correct?
Sent from my ASUS Transformer Pad TF300T using xda app-developers app
Click to expand...
Click to collapse
yes exactly! but you need flash the TWRP again after flash the extracted blob,or it will be the stock recovery.and then you can flash the ROOT.zip.So the device will be rootd.
already rooted. is there a step by step to downgrade to ics. really miss my flash player. can't get it to work on jb.
There is not a way to downgrade at the moment if you are running the OTA JB.
Btw flash can still work with JB using the stock browser. Here's a copy of the recent flash player if you need it
https://www.box.com/shared/b58c065aae3988d53e04
Sent from my ASUS Transformer Pad TF300T using Tapatalk 2
DMardroid said:
There is not a way to downgrade at the moment if you are running the OTA JB.
Btw flash can still work with JB using the stock browser. Here's a copy of the recent flash player if you need it
https://www.box.com/shared/b58c065aae3988d53e04
Sent from my ASUS Transformer Pad TF300T using Tapatalk 2
Click to expand...
Click to collapse
I would think to truly do this, you would need to flash the bootloader, system, and recovery all at the same time so everything is in sync with ICS, just not worth it.
Sent from my ASUS Transformer Pad TF300T using xda app-developers app
funnel71 said:
I would think to truly do this, you would need to flash the bootloader, system, and recovery all at the same time so everything is in sync with ICS, just not worth it.
Sent from my ASUS Transformer Pad TF300T using xda app-developers app
Click to expand...
Click to collapse
Well, can't we just download the latest ICS factory image from Asus? Or would the bootloader prevent us from even using the factory ICS image?
naddie said:
Well, can't we just download the latest ICS factory image from Asus? Or would the bootloader prevent us from even using the factory ICS image?
Click to expand...
Click to collapse
When I was locked, I tried to take the zip and put it in internal storage. It installed the downgrade as it called it, but when done, I was still on jb. I would think if you're on jb and force flashed the ICS blob it would possibly brick the device because jb has different permissions and from what I've read a different partition table all together.
Sent from my ASUS Transformer Pad TF300T using xda app-developers app
funnel71 said:
When I was locked, I tried to take the zip and put it in internal storage. It installed the downgrade as it called it, but when done, I was still on jb. I would think if you're on jb and force flashed the ICS blob it would possibly brick the device because jb has different permissions and from what I've read a different partition table all together.
Sent from my ASUS Transformer Pad TF300T using xda app-developers app
Click to expand...
Click to collapse
I don't believe it has a different partition table but even if it did, asus blobs include the partition table in every update so that wouldn't be an issue, the issue however is that you cannot download the bootloader, the bootloader is now signed seperately to the rest of the update to prevent abuse like what we did with the tf201 to obtain nvflash access. When you unlock the bootloader signature remains enabled while the blob flashing signature check is disabled. This has a side effect of preventing downgrades as the bootloaders pre-JB do not have this same signing mechanism in place.
funnel71 said:
When I was locked, I tried to take the zip and put it in internal storage. It installed the downgrade as it called it, but when done, I was still on jb. I would think if you're on jb and force flashed the ICS blob it would possibly brick the device because jb has different permissions and from what I've read a different partition table all together.
Sent from my ASUS Transformer Pad TF300T using xda app-developers app
Click to expand...
Click to collapse
I actually attempted to downgrade last night. Quite frankly, I think that I came close o a few soft bricks. I tried flashing a custom ICS rom...no go. I tried loading the firmware from the Asus website to the root of the SD card and restart...no go. I tried force flashing the firmware using recovery mode, and it completed "successfully." When I rebooted...no go...and no ROM. This is when I started getting worried, because when I tried to boot into recovery, I received a red error message saying that there was a mismatch. I hard rebooted again, and booted into recovery, and reflashed my JB Rom. I did everything BUT use fastboot to load an ICS recovery image. I didn't want to take that risk.
My suggestion....leave it alone. I am leaving it to the experts. And if you are not an expert, then LEAVE IT TO THEM TOO!
aarsyl said:
I actually attempted to downgrade last night. Quite frankly, I think that I came close o a few soft bricks. I tried flashing a custom ICS rom...no go. I tried loading the firmware from the Asus website to the root of the SD card and restart...no go. I tried force flashing the firmware using recovery mode, and it completed "successfully." When I rebooted...no go...and no ROM. This is when I started getting worried, because when I tried to boot into recovery, I received a red error message saying that there was a mismatch. I hard rebooted again, and booted into recovery, and reflashed my JB Rom. I did everything BUT use fastboot to load an ICS recovery image. I didn't want to take that risk.
My suggestion....leave it alone. I am leaving it to the experts. And if you are not an expert, then LEAVE IT TO THEM TOO!
Click to expand...
Click to collapse
Good suggestion haha - now I have been reading about nvflash being usable for the tf300, but only if you were on the ICS bootloader, wondering if you can do an nvflash type backup - don't know much about it - but after backup, upgrade to jb, then use backup to return to ICS...
Sent from my ASUS Transformer Pad TF300T using xda app-developers app
I tried every method out there to get back to ICS. So there is no way. Tried fastboot, tried adb, tried wolfs downgrade method, tried restoring a backup with CWM and TWRP and many more. So unfortunately there is no way, but Scotts and Seanz Roms were the best Roms on ICS, so I think I dont have to, cause I have the best Roms to choose.
Only thing missing is NVflash and OC (its been working on )
Have you tried erasing everything
mikaole said:
I tried every method out there to get back to ICS. So there is no way. Tried fastboot, tried adb, tried wolfs downgrade method, tried restoring a backup with CWM and TWRP and many more. So unfortunately there is no way, but Scotts and Seanz Roms were the best Roms on ICS, so I think I dont have to, cause I have the best Roms to choose.
Only thing missing is NVflash and OC (its been working on )
Click to expand...
Click to collapse
I recently just restored my bricked Tf300 by using these commands from fastboot thanks to user Buster99
fastboot erase system
fastboot erase recovery
fastboot erase userdata
fastboot erase boot
fastboot erase misc
fastboot erase cache
fastboot -i 0x0B05 flash system c:\adt-bundle\platform-tools\blob (this is my path - your's may vary depending where you stored your blob)
fastboot -i 0x0B05 reboot
this completely erased my system, fixed my bootloo and brought it back to stock. Can there be a way to erase the bootloader this way???
Link to how i recovered "http://forum.xda-developers.com/showthread.php?p=45386598#post45386598"
Asus TF300T
CURRENTLY:
Stock ROM JB OTA
Have several recovery images I have been using with Fastboot via unlocked bootloader.
I have tried both TWRP 2.2 and CWM recoveries to flash various roms. I've tried Hydo, CM9 & CM10
NONE get past the first asus logo. I never get past the device is unlocked message with asus logo and the nvidia tegra logo lower right.
The only way to get past the bricked stage is to fastboot the stock blob file from the asus zip.
HELP!
holy crap me to PLEASE HELP US!!!!!!
jcbrown said:
Asus TF300T
CURRENTLY:
Stock ROM JB OTA
Have several recovery images I have been using with Fastboot via unlocked bootloader.
I have tried both TWRP 2.2 and CWM recoveries to flash various roms. I've tried Hydo, CM9 & CM10
NONE get past the first asus logo. I never get past the device is unlocked message with asus logo and the nvidia tegra logo lower right.
The only way to get past the bricked stage is to fastboot the stock blob file from the asus zip.
HELP!
Click to expand...
Click to collapse
Hay i have the same problem i am unlocked,stock JB,rooted but i cant get any custom roms to load past asus device unlocked screen my thoughts are that the bootloader is not truly unlocked. My device is tf300t with latest OTA U.S. JB.
I've read about something to do with partitions. I just haven't found enough info. The boot loader is unlocked though. Otherwise we wouldn't be able to enter fastboot.
Sent from my SGH-T999 using xda app-developers app
It's because the bootloader partition from JB update is incompatible with all non Asus JB and ICS images. Unfortunately there is no way to downgrade because of no working nvflash, so you're stuck with Asus JB or Hydro JB for the time being.
Skickat från min Transformer Pad TF300T
pitrus- said:
It's because the bootloader partition from JB update is incompatible with all non Asus JB and ICS images. Unfortunately there is no way to downgrade because of no working nvflash, so you're stuck with Asus JB or Hydro JB for the time being.
Skickat från min Transformer Pad TF300T
Click to expand...
Click to collapse
Pitrus is correct. If you have done the OTA there are presently only 3 custom ROMs available to you: JB CleanROM 2.0, JB Blue ROM and JB Hydro 3.4. All others bar stock are incompatible with JB bootloader.
Sent from my HTC Vision using Tapatalk 2
Thanks guys. I'm going to try one of those out. Any suggestions?
Sent from my SGH-T999 using xda app-developers app
Absolutely was my problem. So any advice about running other Roms? Can we flash boot loader to enable non Asus roms?
Sent from my ASUS Transformer Pad TF300T using xda app-developers app
Edit:
Clean Rom 2.0 very nice!
This question might be posted somewhere else, and if so, I apologize.
I recently unlocked my TF700 and installed cwm. I didn't realize this would disable the OTA updates. Is it possible to re-enable the OTA updates while keeping cem installed? If not, what is the easiest way to uninstall cwm and re-enable the updates?
I am currently running the 10.6.1.14.8 firmware with a US sku.
Thanks in advance!
Milkdudengr said:
This question might be posted somewhere else, and if so, I apologize.
I recently unlocked my TF700 and installed cwm. I didn't realize this would disable the OTA updates. Is it possible to re-enable the OTA updates while keeping cem installed? If not, what is the easiest way to uninstall cwm and re-enable the updates?
I am currently running the 10.6.1.14.8 firmware with a US sku.
Thanks in advance!
Click to expand...
Click to collapse
After unlocking you will not be able to receive OTAs anymore, not even if you flash back a full stock firmware. Unlocked bootloader = No more OTAs
Inviato dal mio ASUS Transformer Pad TF700T con Tapatalk 4
Pretoriano80 said:
After unlocking you will not be able to receive OTAs anymore, not even if you flash back a full stock firmware. Unlocked bootloader = No more OTAs
Inviato dal mio ASUS Transformer Pad TF700T con Tapatalk 4
Click to expand...
Click to collapse
Thanks for the quick reply. Will it still be possible to upgrade the firmware and still keep root?
Milkdudengr said:
Thanks for the quick reply. Will it still be possible to upgrade the firmware and still keep root?
Click to expand...
Click to collapse
Yes - but why would you run the stock firmware if you are unlocked and have a custom recovery???
Both CM roms or CROMi-X run circles around the stock rom.
But if you insist on running stock: You can flash the latest Asus firmware in your recovery (full disclosure: I have only used TWRP, don't know anything about CWM but assume it's the same - research it though).
CWM will be replaced with the stock recovery if you flash the full firmware, so you have to flash CWM or TWRP in fastboot again, then you can flash a Superuser package in your custom recovery to gain root.
But it would be so much easier to just flash a custom rom from your current setup - any specific reason you don't want to try it?
Sent from my ASUS Transformer Pad TF700T using Tapatalk 4
berndblb said:
Yes - but why would you run the stock firmware if you are unlocked and have a custom recovery???
Both CM roms or CROMi-X run circles around the stock rom.
But if you insist on running stock: You can flash the latest Asus firmware in your recovery (full disclosure: I have only used TWRP, don't know anything about CWM but assume it's the same - research it though).
CWM will be replaced with the stock recovery if you flash the full firmware, so you have to flash CWM or TWRP in fastboot again, then you can flash a Superuser package in your custom recovery to gain root.
But it would be so much easier to just flash a custom rom from your current setup - any specific reason you don't want to try it?
Sent from my ASUS Transformer Pad TF700T using Tapatalk 4
Click to expand...
Click to collapse
+1 Couldn't have said it better myself. You've already unlocked - now make your tab better
Milkdudengr said:
Thanks for the quick reply. Will it still be possible to upgrade the firmware and still keep root?
Click to expand...
Click to collapse
You can forget about all the root keeping hassle after unlocking, you will be able to root anytime.
berndblb said:
Yes - but why would you run the stock firmware if you are unlocked and have a custom recovery???
Both CM roms or CROMi-X run circles around the stock rom.
But if you insist on running stock: You can flash the latest Asus firmware in your recovery (full disclosure: I have only used TWRP, don't know anything about CWM but assume it's the same - research it though).
CWM will be replaced with the stock recovery if you flash the full firmware, so you have to flash CWM or TWRP in fastboot again, then you can flash a Superuser package in your custom recovery to gain root.
But it would be so much easier to just flash a custom rom from your current setup - any specific reason you don't want to try it?
Sent from my ASUS Transformer Pad TF700T using Tapatalk 4
Click to expand...
Click to collapse
It was more a curiosity thing than anything. I haven't had much time lately so I was sticking to what was familiar. Once things slow down, I plan on playing around with custom ROMs to see what I like best. Do you have any recommendations?
Milkdudengr said:
It was more a curiosity thing than anything. I haven't had much time lately so I was sticking to what was familiar. Once things slow down, I plan on playing around with custom ROMs to see what I like best. Do you have any recommendations?
Click to expand...
Click to collapse
Hell, yes!
http://forum.xda-developers.com/showthread.php?t=2425383
Sent from my ASUS Transformer Pad TF700T using Tapatalk 4
berndblb said:
Hell, yes!
http://forum.xda-developers.com/showthread.php?t=2425383
Sent from my ASUS Transformer Pad TF700T using Tapatalk 4
Click to expand...
Click to collapse
Awesome! Thanks for the recommendation! I'll keep this in mind for when I get a chance!