yashsingh1/xdaforums huggingface dataset:
[Android General] saturnin:
Hello !

I would like to thank whole Acer Devils group for such a wonderful work. Thanks to You I were able to unbrick my A1-811 after official Acer KK update messed my firmware and caused bootloop. Acer Support claimed that my motherboard is broken and they wanted ~250$ for a new one. Recently I've bricked my tablet again (after trying to fix not-working HDMI) and have to apply whole procedure again. There are slight modifications I've to make to the process so here is a list of them:

1) Firmware A1-811 SPFT is described as KK. Actually it's a first version of Acer JB. After flashing it I've upgraded it via Acer Live Updater to JB and then via Acer recovery to Acer KK 4.4. Upgrade to KK 4.4 via Acer Live Update encountered some errors that interrupted process.

2) I weren't able to flash CWM 6.0.5 due to S_SECURITY_SECURE_USB_DL_IMAGE_SIGN_HEADER_NOT_FOUND (6045) error in SPFT. I had to first write secuoff.img, then download preload_unlocker.bin + secro.img and finally download recovery.img.

3) Recovery CWM 6.0.5 (Shreps) won't read sd card. I had to provide SuperSU binary via sideload. I've used MTK Droid Tools 2.5.3 for that. Recovery 6.0.3 (Shreps) works with SD card, but SuperSu binary installed from zip doesn't (somehow) work. Maybe reason is that MTK Droid Tools claims that recovery is incompatibile with firmware?

4) Both A1-811 SPFT firmware (flashed with format option) and orginal Acer KK update clears my IMEI, SN and SNID. I had to restore IMEI via MTK Droid Tools.

After all this steps I have wonderfully working A1-811 with rooted KK 4.4 ! Thank You again Acer Devils !

I have few minor issues with my device so if anyone could help me I will be grateful;

1) Do You have an idea how I can flash/write/set my SD and SNID? Unfortunately I don't have backup of orginal nvram :(

2) Does anyone encountered recovry that works with SD card (backup/restore, install zip) and can also properly install SuperSu?

3) I have problem with HDMI output. My 2 TVs and monitor discover tablet but they show only "active" black screen instead of tablet screen. By "active" I mean they do not go in suspend mode but treat that screen as provided by tablet.

Best Regards,

Saturnin
[Android General] ayfamoks:
Wow that is a incredible experience so that means I shouldn't not update my tablet thru OTA
[Android General] saturnin:
OTA does no such thing for me because it won't upgrade from JB do KK. Manual update via orginal Acer recovery does that. Maybe reason is that I bought my tablet with EMEA firmware and Acer proides KK only in WW_GEN1 version.
[Android General] ayfamoks:
So I can use the OTA, and is the KK update on FP working
[Android General] Shreps:
Many thanks for this feedback !

1- Can you tell which link is JB ? A1-811 | KK | http://is.gd/f811_44 | 38d8d223a6404a4426e5d469cfa86650 this one ?

2- Good to know about the Flashing procedure, [MENTION=313379]nikagl[/MENTION] maybe you can try and confirm this on your A1-811 ?

3- [MENTION=497396]saturnin[/MENTION] if you have time, can you try to flash this recovery version :	CarlivTouch-recovery-3_A1-811_Shreps.img (499ad25d01d7f2fd65e97db6e51baf3c) It should work better than CWM, mounting SDcard + flash of SuperSU should be ok :)

4- Do you have your SNID number ? If yes, you can try to push it back with this tool : http://cutt.us/wqKy (be carefull, this tool edits NVRAM, don't mess up with it !)

About the HDMI part, I don't own the device, so I can't tell, maybe [MENTION=313379]nikagl[/MENTION] ? or other people here ?
[Android General] saturnin:
That's the least I can do to appreciate Your work.

Yes. This one. It's OS_Acer_AV052.RV08RC07.WW_GEN1 (JB 4.2.2).

Both in CWM 6.0.5 and CarlivTouch SDCard is not properly mounted under /storage/sdcard0. It only works in CWM 6.0.3. I've tried SuperSU with CarlivTouch but as far as I recall it worked with JB but not with KK (I had so many tries with SuperSU in faulty CWM 6.0.3 that I'm not sure about that).

Yes, I have SNID so I will definitely try it. Thank You very much.

Edit: That did the trick. SN & SNID are properly set right now :)

I would be grateful for help. As far as I can tell it's probably fault of HDMI driver in firmware since it doesn't work in any version of Acer JB and KK firmare (WW_CWM1).

I had to remove all the links since I can't post them :)
[Android General] Shreps:
FP updated with SPFT Firmwares : A1-811 KK, A1-713, A1-713HD, A1-841, A3-A1x KK

[MENTION=6362841]jitThink[/MENTION] can you try to flash the SPFT Firmware for A1-841, but using

- this SP Flash Tool version : SPFT_1416_140428_sec.zip for A1-841

- this configuration :

Please deselect PRELOADER , MBR , EBR1, SEC_RO items in SPFT
[Android General] jitthink@gmail.com:
A1-841

Thanks [MENTION=4493088]Shreps[/MENTION],

The SPFT is working fine for A1-841.
[Android General] jitThink:
A1-841

Hi [MENTION=4493088]Shreps[/MENTION],

Please help to process for Preloader Unlocked as soonest, and let me know for any further test with A1-841.

Many thanks,
[Android General] saturnin:
Hi [MENTION=4493088]Shreps[/MENTION],

is it hard to modify CWM 6.0.5 for A1-811 and switch mounting external SDCard procedure to that which is used in CWM 6.0.3?

I have little bit of a programming experience so I can try to do it by myself if You have little time. Could You provide me some links describing process?

Best Regards,

Saturnin
[Android General] sure-shot mobile rangia:
hi

please can u help me for my tab

problem is restart

model no. acer TA71CA1
[Android General] Shreps:
Without the device for testing, really hard.

You can try, you have to unpack the img, modify fstab config (and find the good value for mounting sdcard !) , ramdisk rc code maybe too, and repack the recovery image :)

What's that model "TA71CA1" ? Never heard about it, do you have another name ?
[Android General] sure-shot mobile rangia:
https://drive.google.com/file/d/0BxU1V519GVCXYlJCcGc3ZngtbzA/view?usp=sharing
[Android General] Shreps:
Ok, so yes, I don't know this device, it seems to be an Intel one, maybe A1 serie.

Anyway, you should try to reboot in bootloader/recovery and wipe data/factory reset.
[Android General] jitThink:
A1-841

Hi [MENTION=4493088]Shreps[/MENTION],

Does that mean A1-841 will never be rooted?

Thanks
[Android General] Shreps:
For root only, you can try many apps like KingoRoot or other root apps, one of them should work (like for the A3-A20).

About unlocking the bootloader, I think it can only be done by a dev who own the device for testing.
[Android General] jekisa:
can't enter bootloader

my friend gave an acer iconia a1-810 tablet , that doesn't working. The problem is an unique endless boot loop, because the erasing process running always. I don't see this error ever. I can't run the recovery (power+ volume up) and my pc doesn't see. Please, help me. (sorry my bad english)
[Android General] saturnin:
You have to turn device off and follow instructions to flash stock preloader and recovery from first post. In short: You need proper Windows drivers, SP Flash tool and stock recovery. That should do the trick.
[Android General] abstrkt1337:
I'm checking the thread sometime

If someone need help with his B1-710 i can help him, just send me a pm
[Android General] boassss:
a1 810

Hi everbody

I have a A1-810 model running on kitkat with partial root and CWM. I would like to go back to JB and unroot it (original state) in order to get updates via OTA.

Is this possible? What do i have to do?

Thanks in advance.
[Android General] bARTwee:
CWM/Rom/Firmware for B1 740

Hi!

Thanks for taking initiative for the guides. Ive rooted my B1 740.

Is there any development on B1 740 device....

Kindly help on working for recovery. As even if we test some roms and fails, there is always the recovery to restore old files....
[Android General] jitThink:
Thanks for your advice, I have just re-tried with latest version from KingoRoot, the root result fail however when I check from device Root Checker showing Root Access Granted.

Device comes back with NO root after reboot!
[Android General] jekisa:
Thanks for the quick answer. I found out that the device has warranty for a week. I packed and sent for repair.
[Android General] giaomnitel1:
Any news about SPTF firmware for a3-a20fhd? I would like to try rooting it ... But if it fails it would be better to have the stock firmware flashable with SPTF..
[Android General] risoti:
Still not working

Hey guys i did all the steps but still have no root, can someone give me a hand?

Acer A1 811
[Android General] Shreps:
Hum yes, I have them, but need some people with the device to try them !

Do you think you can try it ?
[Android General] giaomnitel1:
Yes, just give me the instructions and I'll try :)
[Android General] di4i:
I'd try it too :)
[Android General] Shreps:
Here you go : http://xdaforums.com/showpost.php?p=59693904&postcount=480

:)
[Android General] cabalio83:
Getting "full" root A1 810

Hi there,

today I had a few spare time so I decided to "fix" my A1-810, I had 4.4 with unlocked bootloader, CWM and root too.

The main issue is the lack of access to system so many apps like adaway, exposed can't work.

I downgraded to Jellybean using SPFT, with AV052_A1-810_RV31RC03_WW_GEN1 firmware (the latest update before KitKat for A1-810)

Then I unlocked bootloader again, installed CWM and flashed latest supersu.

Root is back... oh wait! It turns out that RV31RC03 is as "bad" as KitKat, looks that the kernel in this build is already patched and root is still broken.

I would need a SPFT flashable firmare in order to get to a previous bild (RV21RC02 for eaxlmple could do the trick).

PS: I wonder if the stock ACER recovery can downgdade to a previous JB build, if so I could reflash stock and go back using this link in OP A1-810 [JB] SDs_Acer_A1-810_AV052.RV00RC00_AV052.RV21RC02_WW_GEN1.rar

Fixed, I remembered that is possible to flash an older JB update.zip over with the stock recovery and go back. (RV27RC03) :p
[Android General] risoti:
ERROR

Guys followed the guide from FireDiamond and got this...

See pic
[Android General] Shreps:
Your pic is mising
[Android General] risoti:
sorry cant upload external links and dont know how to show it else
[Android General] nikagl:
Upload it to something like imgur and copy/paste the URL in here (with a space after http:// if you can't post url's either)

---------- Post added at 12:48 AM ---------- Previous post was at 12:40 AM ----------

Hi guys,

I somehow totally missed this post a few weeks ago... oops. I'll check it out tomorrow or so. HDMI will take me a little longer, gotta dig up my hdmi cable to see whether it works. Never actually tried it...

Regards,

Nika.
[Android General] risoti:
http: //i57.tinypic.com/66ix5d.jpg

http: //i57.tinypic.com/16blovn.jpg

http: //i59.tinypic.com/2ep37cz.jpg

http: //i61.tinypic.com/5wi77o.jpg

http: //i60.tinypic.com/2nqbejr.jpg
[Android General] Shreps:
[MENTION=2678770]giaomnitel1[/MENTION] [MENTION=6413372]di4i[/MENTION] any news of testing FW on A3-A20FHD ?

[MENTION=6573831]risoti[/MENTION] can you specify which device you're trying to flash, wich Guide you're following, and which step is giving this error ?
[Android General] fritzpatrick:
[MENTION=6079334]schre[/MENTION]p

Im following the guide from firediamond and that error appeared até the last step...my de vice see PIC please

http: //imgur.com/NYFTkUO
[Android General] yuganta:
Acer Tablate Model TA71CA1

Manufacturer: Acer

Model: TA71CA1

Android Version: 4.2.2

Build ID: JDQ39.41909

Board ID: clovertrail

Chipset Platform: clovertrail

Please provide flash file and tool of this above model
[Android General] Shreps:
Chipset Platform clovertail means it's a device based on Intel Atom SoC, so you're on the wrong thread (MTK tabs here only).

But I can tell you that I don't have ressource for this device.
[Android General] nikagl:
See previous post from [MENTION=497396]saturnin[/MENTION] in which was mentioned you should use CWM 6.0.3.0. Or try Carliv recovery [MENTION=4493088]Shreps[/MENTION] provided.

I'll try both later... no time yet... :(

---------- Post added at 10:26 PM ---------- Previous post was at 10:06 PM ----------

Thanks [MENTION=497396]saturnin[/MENTION]. That did the trick! So, to add some steps to [MENTION=5889030]FireDiamond[/MENTION] guide for A1-811 (4a and 4b are new!!):

3.4 Click "Write Memory" and connect your tab to PC.
3.4.1 Red progress bar will appear.
3.4.2 Gray-green progress will appear.
3.4.3 Green circle will appear and you will hear the "device disconnected"
sound. Disconnect tab, DO NOT turn it on!
3.5 After this return to the "Download" tab.
4a. First select only PRELOADER (use preloader_unlocked.bin) and SEC_RO (use secuoff.img). Press "Download" and connect your tab to PC. Flashing process will start about in 20 seconds.
You will see following progress bars:
4.1 Red progress bar.
4.2 Purple progress bar.
4.3 Yellow progress bar.
4.5 Green circle.
4.6 Disconnect your tab from PC, DO NOT turn it on!
4b. Second select only RECOVERY (use recovery.img or CarlivTouch-recovery-3_A1-811_Shreps.img or CWM_6.0.3.0_A1-811-Shreps.img). Press "Download" and connect your tab to PC. Flashing process will start about in 20 seconds.
You will see following progress bars:
4.1 Red progress bar.
4.2 Purple progress bar.
4.3 Yellow progress bar.
4.5 Green circle.
5. Disconnect your tab from PC. Do not boot Android, try to boot in recovery!

Regards,

Nika.

---------- Post added at 10:37 PM ---------- Previous post was at 10:26 PM ----------

[MENTION=4493088]Shreps[/MENTION], Carliv Touch recovery looks good but can't mount SDCARD:

E:Can't mount /storage/sdcard0

CWM 6.0.3.0 works. But beware <32 GB only :)

---------- Post added at 11:24 PM ---------- Previous post was at 10:37 PM ----------

Ok, one more message. I tried installing SuperSU. Although no errors, after reboot it wasn't rooted. I assume that's caused by the /system not being able to mount as writeable? I would have expected an error during SuperSU install... In that case I'm afraid we're stuck with the Root from Scratch method using the Iconia Toolkit...

Installing the zip using sideload from Carliv has the same result. After that Recovery Log shows several errors about no such file, etc...

---------- Post added at 11:28 PM ---------- Previous post was at 11:24 PM ----------

Lol. Ignore that last one. Installing use ADB Sideload from Carliv worked! For some reason using CWM from the /sdcard didn't work...
[Android General] hopnguyen:
new link

hepl link rom a1 811 can't dowload . new link thanhk very much :(
[Android General] nikagl:
Please do not quote the whole frontpage!!

Which Link? AFAIK all links are ok.
[Android General] debeliamark:
Is there a testpoint for A1-810 to force download / preloader mode?
[Android General] Shreps:
It should, but don't know if someone found them.

Did you simply try to disconnect the battery ? (by opening the back cover of the device and unplug/disconnect battery connectors)
[Android General] debeliamark:
I was disassembly device in try to find what is wrong and checked well - the PCB is like new, device itself draw near to 170 - 180 mAmp from PSU ( emulating battery ) if power on is pressed - mean MTK processor is wake up and try to start it, BUT cannot . Same behavior and if plug USB cable . The main problem is that there NO ANY catch on PC .... nothing - no MTK Preloader, No DA, no even unknown device - so there a lot of chinese devices that have testpoint ( marked COLO, KOLO or KCOLO ) that force download mode for MTK processors used and then you can connect and flash it via SP FlashTool, but i can't find on those Acer A1-810 something that look like this .
[Android General] nikagl:
I have never debugged this kind of thing (A1-811, very similar except with 2G/3G). See whether you can find JP6, it's the common debug connector. TP5 is KCOL0. Can that be used? Also JP13 has TP1 which is KCOL0. I have seen some posts here and there which mention connecting KCOL0 and GND, but again... never done anything like this before so don't expect real help from me :)
[Android General] Moriveon:
All Acer MTK-powered tabs HAVE testpoints, but they are not signed on motherboard.

I know TP locations for A1-810, B1-710, B1-711, B1-720 and B1-A71.

If you still need one for A1-810, let me know - I'll try to find photo of TP.
[Android General] nikagl:
I have taken apart my device and cannot find TP yet. The afore mentioned TP's turned out to be for another device (long live google ;)). I think the KCOL0 TP is simply Volume Up. I don't think there's anyting else. Did you try hold Vol-Up and turn power on? JTAG and other KCOL's should be somewhere near the CPU, but I don't want to brick my device (I was already happy I revived it by replace the screen) so this is all I can do for now...
[Android General] debeliamark:
Unfortunately i was boot it with success, but ... Hylinx eMMC IC is dead. SPFT cannot access it and i was take it out - checked in Z3X-JTAG eMMC addon - same results. Finaly i'm lucky, due to find for same working second hand 8Gb PCB for 10 Euro just ... was do not costs the all work about to check, eMMC remove ect. if i know in advance that can find cheap board

---------- Post added at 04:09 AM ---------- Previous post was at 04:07 AM ----------

Will upload photo of A1-810 PCB - just may someone other can find it usefull . I don't need it anymore.
[Android General] saturnin:
I have A-811 which is quite similar to A1-810 except 2G/3G support. After half-bricking device I were able to revive it by reflashing preloader. Sometimes my device do not enter flash mode after turning it off and then hard reset (with hardware key) or disconnecting battery helps.
[Android General] dzinner:
I've just rooted my A3-A20FHD with Kingo Root on the first try.

I can also boot into recovery by holding the volume up key.

My question now would be - does anyone know if someone is working on custom ROMs for the A3-A20FHD?
[Android General] risoti:
Hi Nika, it looks like everything went great but how do i do this steld? Have no ideia how sideload works...
[Android General] nikagl:
Sideload needs to be executed from the PC. Boot device in recovery, select install zip and install zip from sideload. Then connect device to pc using USB and when drivers are loaded type "adb sideload UPDATE-SuperSU-v2.46.zip". Off course you need to be in the folder that contains the specified zip :)

Here's another CWM that suposedly should be able to mount sdcard and mount system correctly to install supersu too :):

http://cutt.us/SBZLr

Regards,

Nika.
[Android General] Darrian:
I just rooted an A1-850 using that guide, so thanks. Getting the drivers to install was a ***** and it took me a couple of days to figure it out, but it worked. Now my camera won't work, so I am trying to figure out what went wrong there.
[Android General] milogen:
is there any custom rom or lollipop rom available for A3-A20 ?
[Android General] bmttinman:
How do I recovery?

Took out to much. Tablet is won't power up from sleep. I have tried to factory wipe but does not restore all of Acer APPs. I am rooted by Kings root. I have down load both Acer AVOKO from this post and have put them on the SD card but will not load from recovery.

How do I get factory image back on this tablet?
[Android General] nikagl:
If you want to get factory image back on tablet, follow these instructions:

http://xdaforums.com/showpost.php?p=59693904&postcount=480
[Android General] bmttinman:
I have done this. When I do the flash tool to load gives Error: Initializing scatter file failed. Please check name of scatter file which you load is legal.

The down load for flash tool Does not cover my A3-A20FHD please check screen of the post
[Android General] nikagl:
I'm afraid you're gonna have to do better and try again. I did the first steps exactly as described.

Downloaded these files:

SP_Flash_Tool_exe_Windows_v5.1352.01.zip for A3-A20 & A3-A20FHD

A3-A20FHD| KK | http://cutt.us/e5Smh | 9b3c816da5e843a90c1c8a16af14d44b | AV0K0_A3-A20FHD_1.023.00_WW_GEN1

Extracted the zip with the flashtool

Extracted the rar with another rar and extracted that rar too

Opened the MT8127_Android_scatter.txt file

Worked fine...for both the full ROM and the rework-secro folder...
[Android General] bmttinman:
I double check all down loads listed. I even went to Media Teck and got the newest one.

Unzip ALL files got this. See thumbnail and still get error message
[Android General] nikagl:
You have downloaded sd recovery zip and not spft file. Download rar again from my post above...

This file: http://cutt.us/e5Smh
[Android General] bmttinman:
I have done this also same message.
[Android General] bmttinman:
Opened the MT8127_Android_scatter.txt file where are you get this file?
[Android General] nikagl:
From the rar in the rework-secro folder. Please show screenprint if you get error.
[Android General] nikagl:
I honestly have no idea what you're doing. See attached for screenprints of the download Shreps provided in his post that I quoted two times already.
[Android General] bmttinman:
I found the files that you show. I did as the instructions say. Now the pad is bricked. I have even gone to another Computer
[Android General] nikagl:
Please give more detail. What did you do? What did not work in the instructions? What makes you say your pad is bricked? What was the last step you did in the instructions? Screenshots show the secro part. Did you get to the green Circle? Have you seen any other colours in the bottom part (where the speed is)? Did it turn red or not?

Really... if you want us to help you, please be detailed in posting issues and questions. If you cannot, I'm afraid you should not try to root devices at all....
[Android General] bmttinman:
The screen is blank. It will not boot up. I never got a green circle. The flash tool show it is working but know movement. Device manager says that it is there. I have even tried here http://laurentiumihet.ro/sp-flash-t...installation-guide-including-bricked-devices/
[Android General] nikagl:
If you have not seen anything happening in the speed bar in the bottom of the screen, and have not had the green circle, nothing has happened yet. When did it happen that you couldn't turn the tab on anymore?

I do not have your tablet, so not sure whether this works for you too, but for mine when I hold the power button more than 30 seconds, it will turn off. I have had occasions where I had to disconnect the battery but as that requires opening your tab, I would not recommend to do this. Sometimes simply waiting till the device discharges the battery also works.

Maybe it is hanging in some state? When you connect USB, do you hear a sound? What do you see in your device manager on the laptop? Do you see a MT65xx Preloader device? And what about the LED on the device? Does it turn on?
[Android General] bmttinman:
Yes I here sound when connected. No Power light. I have held power button down for a minute. I have tried Volume Up and Power button,

---------- Post added at 04:02 PM ---------- Previous post was at 04:00 PM ----------

I was getting battery charge indicator until I tried the flash this morning. Now there is nothing
[Android General] hopnguyen:
thank man . how root a1 811 4.4.2 ?
[Android General] bmttinman:
I try to be as clear as possible but being in construction most of my life this is to the point and as descriptive as I thought it needed to be. this is not my first time at rooting this is my first time I took out too much. I generally can fix most of these problems by myself for I have learned a lot from this site and off of the Android phones that have shown the abuse over the years I can generally figure out anything but this time I have a brick tablet that I have packed up and I am sending back to Acer for I have ran of ideas. Thank you all