yashsingh1/xdaforums huggingface dataset:
[Acer Iconia One 8] DemonScythe45:
Greetings, this is my first time on XDA developers. I bought a used A1-850 for experimentation with rooting, so I found this guide and attempted Guide 2 (only one listed as compatible with the 850). Like quite a few other people, I became stuck at this screen in fastboot:

Installer device ignored

FASTBOOT INIT

failed to mount device '/dev/block/sda1' as installer partition using fs_type 'vfat'

FASTBOOT CMD WAITING

installer device ignored

installer device ignored

No valid installer medium found

Could not open /sys/devices/virtual/backlight

And the batch file stuck at "waiting for device." I have discovered the issue is that the device is ignoring fastboot commands from the computer. While I could not get it to respond to fastboot commands in Windows, on Linux I discovered that if the tablet is unplugged and then plugged back in, it will respond to fastboot commands. I then read the batch file and manually ran the commands for the T3 exploit, resulting in a successful root. When I have the time, I will build a shell script that does the same thing as the batch file from Guide 2 and upload it here. As a note, the fastboot command required root/sudo to properly talk to the USB bus.
[Acer Iconia One 8] pdnorman:
B1-850, the Red-Headed Step Child of Tablets

Somebody must have really got to the Acer people. Seems like they are pushing updates just to see if they can make their devices unrootable. I made the fatal mistake of allowing an update when I had it rooted, only to lose root. It was so easy to gain root initially, surely it would be no more difficult afterwards. That was a mistake I'll never make again. So i blew it, but what's up? The B1-850 is not included in Iconia One 8 listing of devices. No one responds to posts for assistance with a B!-850. If it's not "cost effective" to spend time on or it's unrootable I would at least make a remote control out of it and move on. But since I found instructions here to root my Amazon Firephone, a Acer product in production for over a year should be simple for folks that have exploits waiting for the landmark devices to roll off the assembly line. Us poor folks need some love too - please.
[Acer Iconia One 8] gorzka:
Hello,

I have an A1-830 and try it to root the tablet. I do all what but the tablet reboot into the "DROIDBOOT PROVISION OS". and it say:

FASTBOOT INIT...

FASTBOOT CMD WAITING...

what is wrong?
[Acer Iconia One 8] Treyday645:
I have a link to a recovery. can't post links yet so message me :o
[Acer Iconia One 8] lsk91:
Has anyone successfully flashed a 5.x ROM or higher (that isn't rooted) onto the A1-840FHD cause even tho QooApp is letting me use the apps/games I want i feel like this device would work so much better if i could get it off KitKat
[Acer Iconia One 8] pdnorman:
I'm still determined to root this(have 2ea.)B1-850. As someone stated, the kernal and code is available on the website. The bootloader can be unlocked in developer options. Is there anything else needed to find a root solution other than the expertise, that I'm lacking?
[Acer Iconia One 8] crukad:
I have an A1-860, and I have tried to root with methods 2 and three, but neither worked

When I try either of them, the tablet shows the bootloader screen and says either FASTBOOT CMD WAITING... or something about media

I have also tried using the method from the third post at https://androidforums.com/threads/how-to-root-a1-860.1014590/

I believe that the issue is with the device not showing up on the pc in fastboot

Edit: I will attempt once again, but with a different cable

Edit2: Results are in and
[Acer Iconia One 8] effemme8:
Hi,

MY Iconia 8 was Blocked : when starting Can arrive in one of two picture

Can I to flash STOCK rom?

Inviato dal mio Le 2 utilizzando Tapatalk
[Acer Iconia One 8] Prophit219:
upgrading microSD card.Data transfering problem

complete noob. So I sucessfully rooted my tab A1-840FHD a while back and expanded avaible space with a 32gb micro SD card using LINK2SD app and creating the partition using "mini partition tool" nessarry to move the apps to the SD. I recently got a 64gb microSD card and would like to migrate my 32gb data to it. I tried copying the disk information and copy partition options but it won't let me merge the ext2 data with the unallocated space to create a larger capacity to install apps. I tried making it a logical drive , a primary, I tried making the unallocated space an ext2 but still can't just copy the data into the space. I need to keep the 4.4 firmware because it's the only way the tablet can run most of the games i bought that no longer run on my modern devices so I can't move apps to the primary media fat32 space either. I just want to move the data to the bigger microSD and have the 2 partitions nessary. What am I doing wrong?
[Acer Iconia One 8] baconbacon:
I have what I assume is a newer build of this device, a B1-860a that does not work with these methods.
[Acer Iconia One 8] dogmarcopolo:
need the recovery images

This thread has no activity for years now, but I need to try my luck anyhow. I need the following img:

1. CWM-v6.0.3.7_A1-840FHD.img.zip

2. stock_recovery.zip

they are from "Guide 4 - Flash CWM Recovery (permanent)" but the links were dangling now. Could any kind soul points me to the right place to get them?

Thanks in advance.
[Acer Iconia One 8] webfischi:
Fix fastboot issue with Windows 10

I had problems with the Acer Iconia Tab 8 A1-850 because the device disconnects when it is rebooting.

The solution is pretty easy, the attached batch file can be used, when the device is already in fastboot mode, all you have to do is plug in the device, and install the "Android ADB Interface". It is also recommended to install the SDK Platform tools (install guides are all over the web)

Here is everything step-by-step:

Be sure you have turned on USB Debugging in the developer options

Boot device in fastboot mode

Start device in recovery mode

Choose fastboot mode

OR

Connect to PC

Open cmd

Type in adb reboot bootloader

Let Windows know that the tablet is in fastboot mode

When device is in fastboot mode, connect to PC

Open device manager

Right click the unknown device that should be your tablet

Choose "Update Driver Software..."

Choose "Browse my computer for driver software"

Then click "Let me pick from a list of device drivers on my computer"

Select "Android" from the device list

Install the "Android ADB Interface"

Check connection with cmd fastboot devices

If the devices SNID number shows up, it's working

Run CWM

Execute launcher.bat

ACCEPT the disclaimer

Now "DEVICE STATUS" should be "FASTBOOT-ONLINE" instead of "ADB-ONLINE"

If you know use the oem trigger for your device the device boots right up into CWM
[Acer Iconia One 8] Red_Acid:
I couldn't find "stock_recovery.zip" (and I don't think I really need it), but I've found "CWM-v6.0.3.7_A1-840FHD.img" here (thank you Google search!) and I've just flashed my device with it and it was successful!

Running CWM as the recovery and root working flawlessly. Have it a go, mate!
[Acer Iconia One 8] Johnknne:
question

It works in B1-860A?
[Acer Iconia One 8] eivarin:
Custom ROM

Any word on a custom ROM with 5.0 or higher android???

Btw the device i have is a acer iconia tab 8 a1-840fhd(Ducati2fhd)

The thing is that i cant seem to find any on the web nor the forum itself.

and neither cyanogenmod nor lineage support it
[Acer Iconia One 8] XxXDude:
May 14, 2019

Acer Iconia Tab 8 (A1-840FHD)

I try your Guide 1 and don't work.

I try your Guide 2 and ..... and......W O R K !!!!

Thanks a lot !

PS

Don't know if I can update my OS 4.4.2 to 4.4.4 or more and how to do that ...
[Acer Iconia One 8] vbnmu:
I first rooted my A1-840FHD and used tethered CWM - that was a few years ago. Yesterday I followed Guide 4 and everything is working as it should. I googled the CMW recovery in Guide 4 and found a mediafire link which i can't post here for some reason.

The tablet feels solid after all these years but a bit slow even after disabling many many apps. One of the Acer apps causes errors when disabled so bear that in mind.

I've installed launcher<3 from the play store and it feels less laggy than Acer's own launcher.

Ok here's the link:

http://www.mediafire.com/file/glyeguc8ublxuq2/CWM-v6.0.3.7_A1-840FHD.img
[Acer Iconia One 8] MobiloFon:
Wors like a charm

Hi, I used method 2 just the way you said. And now my acer is rooted. Great! And thanks in advance. Furthermore I understood this tablet can't be unlocked and so there is no possibilty to flash a custom Rom. And so there are no custom Roms. Meaning I'm stucked to lollipop (5.0). It's a shame because it is the most terrible ROM I've ever seen. So never no more an Acer again!
[Acer Iconia One 8] TimS777:
Easily ROOT A1-840 Tablet

I successfully ROOTED my A1-840 Tablet by following the instruction in a Youtube video.

1) Download and copy UPDATE-SuperSU-v2.40.zip to tablet (no need to unzip/extract it)

2) Download and extract IntelAndroid-FBRL.rar on a PC (WinRar archive tool may be needed to extract)

3) Run launcher.bat (included in IntelAndroid-FBRL.rar)

4) Type 'ACCEPT' on the tablet when asked

Type 'T3' on the tablet when asked

<WAIT> (Don't worry if the tablet says "FAILED (status read FaILED (Too many links)")

Choose 'Install ZIP' (navigate with + and - volume - Power button to accept)

Choose 'Install zip from sdcard'

browse to UPDATE-SuperSU-v2.40.zip

Yes - Install UPDATE-SuperSU-v2.zip

You are ROOTed !
[Acer Iconia One 8] zolly9z:
Aconia B1-820

Hello! im already root my device. Can I flash a firmware? and if i can, who have b1-820 firmware? Please send to me. Thank you!
[Acer Iconia One 8] Filarh:
Model, did you used temp root method?. I don't think you can't because your bootloader is still locked and if there is no oficial or trusted method I suggest you to not doing anything or you will get a hard brick because there is no Download_Agent.bin for using SP flash tool, however you can dump recover and boot partitions using dd command as root in terminal
[Acer Iconia One 8] kabeza:
Hi guys

Does anyone know if there's a custom rom (or something smooth not stock, without bloatware) available nowadays for B1-820 ?

Thanks
[Acer Iconia One 8] genterminl:
Similar question to others - I have an A1-830, already rooted long ago. Is there any hope of getting it to any version of android above 4.4.2? It's not the fastest device around, but I'd really love to be able to run some apps which just don't support that old an android version.
[Acer Iconia One 8] pete30nz:
Hi,

I got this far with my A1 830.

I don't know what to do here?

Thanks

Pete
[Acer Iconia One 8] BrNcO:
For all those with this error:

"E:installer device ignored

FASTBOOT INIT ...

E:Failed to mount device '/dev/block/sda1' as installer partition using fs_type 'vfat'

E:installer device ignored

E:installer device ignored

E:No valid installer medium found.

FASTBOOT CMD WAITING...

Could not open /sys/devices/virtual/blacklight "

You are most likely missing "fastboot" driver. In this video you will find a way how to install it manually.

Pretty much what you have to do is to get your table into fastboot (to the spot where you see higher mentioned error) and then

follow the video to see how to install the driver. My unrecognized device in device manager was called "Android-phone"

Good luck!
[Acer Iconia One 8] borisgregoris:
I have used ES Explorer with root permissions and R/W to \system. Then I copied all your files in \system\app without replacing my files, but did not change any permissions after that. I hope that's the problem. :p
[Acer Iconia One 8] stari_alca:
If Shreps can pull the images from his FHD tab can use fastboot to flash system and return to the original state?
[Acer Iconia One 8] borisgregoris:
That would be perfect. Although Shreps has said that he would upload the /system, but that will not be flashable.

I've never used FlashBoot. So far I only used the CWM on my devices.
[Acer Iconia One 8] mgriesi:
Hi - I can't figure out if I have the HD or FHD. The back sticker and info screen both just say A1-840. The RMN number of the back is A1409 and manufacture date is Oct 2014. Assuming this guide works, can I and if so how do I install Windows 8 on it? Thanks!
[Acer Iconia One 8] paugustin:
Just look at the screen resolution and you'll have your answer.

Are you saying you want to install Windows on that tablet? It has not been done AFAIK however it might be possible... That being said I doubt it would be interesting...

Envoyé de mon S520 en utilisant Tapatalk
[Acer Iconia One 8] retroben:
I also want Windows related stuff,mainly PJ64 since it is deh baeyest.

I would settle for Linux running WINE.

I have access to a keyboard for the tablet,so that makes using Windows programs more practical.

I wonder what the bootloader status is on these tablets?

Somebody should see if Acer would be supportive with unlocked bootloaders like Sony is for Xperia devices.
[Acer Iconia One 8] paugustin:
Tried to root A1-840FHD running : RV0TRC01 (1.057.00_WW_GEN1)

it failed :
[Acer Iconia One 8] Shreps:
Here is the pull system zip : http://acer.shreps.fr/dls/storage/A1-840FHD/A1-840FHD_1.042_AV0K1_RV0MRC02_WW_GEN1.zip

It's not CWM flashable

But you will have all system files.

I'm checking if I can make a fastboot flashable firmware (but seems not easy)

It means we cannot upgrade to this OTA if we want to keep the CWM start exploit :(
[Acer Iconia One 8] stari_alca:
Thanks a lot, Shreps. I've tried a few things, even tried to make a flashable zip myself but failed. I can push the files using ADB but problem is I don't know which files to go for and I am sort of scared of just overwriting /system.

So I used the tool from OP of this thread to enter the CWM recovery. Instead of flashing the UPDATE-supersu zip I am making a nandroid backup of my system.

This is what I wanted to ask you: could you make a nandroid backup of your system as well and upload just the /system partition nandroid backup? That way I can use the Advanced Restore option and restore just the /system and, hopefully, return everything to stock.
[Acer Iconia One 8] stari_alca:
OK, I screwed up. I tried to make my own signed update.zip file with Shreps' /system pull and flash it through the CWM recovery. I made a nandroid backup and thought it is safe. It is not.

I have bricked my tab. I get a bootloop. I can access it through fastboot but I have nothing to flash. Restoring from my backup returns a MD5 missmatch error. I have found a way, now, to flash a zip with the correct update-binary (from Sherps' earlier upload for the non-FHD version of the tab) but even though CWM says it has installed correctly I still have an issue.

I'm hoping to repack my backed up /system partition into a flashable zip. It would be great if anyone here could:

a) offer any advice, point me into any direction that might help me restore system

b) upload the stock boot.img because I want to try and fastboot flash that to see if it helps

Thanks all.
[Acer Iconia One 8] Shreps:
Here is a A1-840FHD system CWM backup from my tab

Maybe it could help.

About boot.img, we have [MENTION=1829889]vache[/MENTION] that found this one, but we never flash it and we don't know if it's ok or not. So it's really risky to flash it via fastboot.
[Acer Iconia One 8] Shreps:
First post updated with a second Guide for A1-840FHD and the latest firmware !

@ All A1-830 and A1-840 (HD) user, please try this 2nd Guide, it should work !

cc [MENTION=4779109]Gburd87[/MENTION] [MENTION=5591364]zootsuited[/MENTION] [MENTION=5345229]M.Ray[/MENTION] [MENTION=5869292]retroben[/MENTION] [MENTION=2205551]paugustin[/MENTION] [MENTION=5129722]Matx13[/MENTION]
[Acer Iconia One 8] social-design-concepts:
Hey could you post the out put of ls -l /sbin and ps
[Acer Iconia One 8] social-design-concepts:
Sorry I ment while in the tethered recovery session
[Acer Iconia One 8] Shreps:
In recovery session, adb doesn't see the device, and I have no USB device detected by Windows.

And there is no terminal on the recovery

Any other idear? :p
[Acer Iconia One 8] social-design-concepts:
That's good to know hmm . I'll send you some info for dumping the devices boot.img recovery.img and fastboot.img having those may help figure out why the tethered cwm recovery launcher doesn't start the adb service
[Acer Iconia One 8] retroben:
all caps:it worked on 840hd!!!

Seeder allows enabling,so it is in fact rooted.
[Acer Iconia One 8] stari_alca:
Yes! Unbricked my tab. Thanks a bunch [MENTION=4493088]Shreps[/MENTION] and social-design-concepts.

I used the second method to tethwer CWM to and this time it restored Shreps' system nandroid backup with no problem. I now have a stock, unrooted and fully operational tab.
[Acer Iconia One 8] Shreps:
Good news ! FP updated :)

Very nice ! And thanks for your don ;)
[Acer Iconia One 8] ThaBlueSlipper:
Does anyone has the B1-810 stock firmware? I messed something up during the root process ( not sure what but ok) and now my device just show the Acer logo for +-2 seconds and turns off. I can get it into recovery but I can't find the stock firmware file anywhere and the links on the original post just give the "403 Forbidden" error.

Anyone out there has a copy of the firmware that can send me please?
[Acer Iconia One 8] humeav:
If your computer does not detect the device in fastboot mode just download this. You will go to manage devices, select your device and press update drivers. press examine from ur own pc or however it says and then press choose from a list of drivers from ur computer or idk and select use disc. then u extract the zip file and you press examine in the drivers thingy and search for the folder u just extracted and put android win usb. then u press ok or accept and select the first driver on top. that's it bye bye
[Acer Iconia One 8] BadMix:
Has anyone here been able to update from OTA while having root? I can´t install it and neither some other guys I know from another forum that did the root as described in the first post of this thread, my guess is because the process somehow knows the Tab is rooted and aborts the update.

Any advice?
[Acer Iconia One 8] Shreps:
I updated my A1-840FHD without any problem (previously rooted)

If it's the download that doesn't work, you can manualy download and flash the OTA via the stock recovery (please check links in previous post)

Envoyé de mon One+
[Acer Iconia One 8] social-design-concepts:
Xposed being active breaks ota and so does removing almost anything from system
[Acer Iconia One 8] arek78:
You know something like obtaining permits Root "Acer Iconia Tab 8 A1-841"
[Acer Iconia One 8] social-design-concepts:
Have you tried the tethered recovery?
[Acer Iconia One 8] Shreps:
A1-841 is MTK based, please look at the Acer Iconia MTK Tab dev thread.

Envoyé de mon One+
[Acer Iconia One 8] arek78:
Cincinnati Yes. It bloca in Fastboot mode and nothing.
[Acer Iconia One 8] social-design-concepts:
Sorry I didn't realize that wasn't intel atom based
[Acer Iconia One 8] kanedagr:
For me that I have the ACER Iconia Tab 8 A1-840 with ACER_AV0K1_A1-840_1.061.00_WW_GEN1, with 1GB ram and resolution of 1280x880 which guide should i follow?

I followed the second guide (T3) and everything went smooth!! Thanks!
[Acer Iconia One 8] scoutdriver73:
Thanks for this!

The T3 exploit worked for me on a 840HD (1280x880, 1GB of RAM) with the following firmware - Acer_AV0K1_A1-840_1.061.00_WW_GEN1
[Acer Iconia One 8] vettejock99:
Help

moved to Q&A
[Acer Iconia One 8] Ropb:
Is there any custom recovery for the 840 fhd?
[Acer Iconia One 8] vettejock99:
Additional help request

So I did put an actual question in the Q&A related to the "E:No valid installer medium" error I'm seeing when the devices reboots into bootloader. My theory is that the pointers are off for me for some reason and if I could use adb commands to reboot the device, push the recovery file and SuperSU, and reboot into the recovery to install SuperSU then it would work. So my request is can someone post those steps? Maybe also the latest known firmware revision to work, and what devices Windows shows during reboot to ensure it isn't the driver that's off?

To add to the info, the 840 I have is running Acer_AVOK1_A1-840_1.061.00_WW_GEN1 and the 840FHD is running Acer_AVOK1_A1-840FHD_1.057.00_WW_GEN1, so if I actually need to downgrade them somehow I'm happy to do that if someone can help me with that as well. The battery drain and bloat is killing me, so I really hope I can root these.

Thanks!!!!
[Acer Iconia One 8] vampirefo:
Why not just root via linux livecd? I posted a linux version of cwm tethering root method, very simple to use.

http://xdaforums.com/showthread.php?t=2963104

Linux Tethered CWM Recovery Version
[Acer Iconia One 8] vettejock99:
I'll take a look!
[Acer Iconia One 8] kanedagr:
Hello and a happy new year. I managed to successfully root my tablet but since then when i leave it for some time and the screen closes it freezes and the only way to open it is by pressing the volume down key and the power button. Has anyone have the same problem? After the successful root of the tablet i installed adaway to get rid of the so many ads. What should i do? Is there any way to unroot it?
[Acer Iconia One 8] vettejock99:
Hey all, I have seen references to xposed here as well. Seems like it's working for some? I'd I enable it then my machine bootloops on the reboot so if anyone has an idea why that is then please let me know!
[Acer Iconia One 8] Shreps:
FP updated with some Firmwares ;)

Enjoy ! And Happy new year !
[Acer Iconia One 8] kanedagr:
The firmwares listed in the first post are adding some new features? Are newer or faster that the one I have on my A1-840?
[Acer Iconia One 8] kanedagr:
I noticed something odd the 1st time i rooted a1-840. The recovery menu (some options missing) was not shown as the one on the 1st post but i didn't give too much attention to this since the updates within the recovery were installing normally. But today, i tried something different. Because the tablet was constantly freezing when the screen went off, i installed through the recovery (recovery with some options missing) the firmware that corresponded to my device that Shreps post it on the 1st post. Then the device was unrooted again. So, i tried to first run the T1 exploit, it failed, it rebooted, then run the T2 exploit, it again failed, it rebooted, then run the T3 exploit and it worked like a charm and finally I have the complete options of CWM recovery (mounts, advanced, e.t.c). The only thing for me to witness is if it will continue to freeze every time the screen goes off. I will keep you posted. Hope my post is understandable!!! :)
[Acer Iconia One 8] kanedagr:
Problem with the recovery!

Hello. I tried to boot into the recovery but it doesn't display the CWM from Vampirefo as it did the first time that i booted. (read my previous post). I attach the following screens to help resolve the issue (if anyone can help).
[Acer Iconia One 8] webwude:
Worked perfectly here :)
[Acer Iconia One 8] Shreps:
Acer Iconia Tab One 8 - B1-810 also compatible :)

added to FP.
[Acer Iconia One 8] hllywd:
Quick question. I just got the tab 8 and I'm not sure which one I should download. Mine is an A1-840. That's I. No he, for or anything. Thanks
[Acer Iconia One 8] kanedagr:
Guide 2 will do the job for you! Be sure to:

Requirement

Install the official Generic Google USB Drivers on your Desktop (http://developer.android.com/sdk/win-usb.html) - Also available in the TOOLKIT Package

Enable USB Debug on your Device
[Acer Iconia One 8] vache:
Hi,

I repacked a CWM for A1-840 FHD (only) based on Dell Venue 8 one. (http://xdaforums.com/dell-venue/general/dell-venue-8-cwm-unsecure-boot-recovery-t2866925)

Tested successfully on my device.

Could someone test to flash this ?

CWM : http://bit.ly/A1-840FHD_CWM

Recovery stock : http://bit.ly/A1-840FHD_StockRecovery

ADB + Fastboot for Intel devices : http://bit.ly/ADB_Fastboot_Intel (use this to flash)

fastboot flash recovery CWM-v6.0.3.7_A1-840FHD.img

Then use droidboot menu to reboot in recovery.
[Acer Iconia One 8] Shreps:
Confirmed it works great !

I will add this to FP ;)

Thx [MENTION=1829889]vache[/MENTION] & [MENTION=2472806]vampirefo[/MENTION]