yashsingh1/xdaforums huggingface dataset:
[Miscellaneous Android Development] ViAlexSt:
Well, I do not know - I will not say. I noticed that all Chinese tablets in sleep mode the charge goes very well. Crappy batteries they use - my only answer. I have 3 tablet Samsung - time work as stated.

Honestly, I would have bought a tablet Xiaomi: my phone and I am satisfied with the quality. But they are already very small screen made - 8 inches - I believe the tablet should be at least 10 inches.

In General, I these Chinese tablets is good because WHERE ELSE a dual booth system will find? Microsoft does not, and Samsung too.
[Miscellaneous Android Development] pouskidis:
I agree. I particularly like the 9.7'' size. Crappy components are the problem from Chinese tablets. Batteries too I guess. But the third party support like yours is exellent and changes the tablet altogether. Indeed a dual boot tablet is something special.

What shall be done to import cm 12.1 to our Onda? Is it easy to produce the nessecary patch?
[Miscellaneous Android Development] nakedsoul:
THANK YOU ViAlexSt .... WHAT A HERO! Using the latest version of android on the v919 air ch I bought as windows only. With the new Bios, Android is installed ... which is what I wanted for over a year. thank you sir!
[Miscellaneous Android Development] ViAlexSt:
Thank you for such a flattering review :highfive: Unfortunately, I seem to have burned my Onda attempt desoldering additional USB-port. Is a corpse. I gave it to repair, replaced the power controller. But... While the hope for revival of the tablet is not dead. Chuwi, of course, better tablets makes. But in general, I would say that Chinese tablets are terrible :p I always use the tablets Samsung. BUT!!! There is no tablet with dual-boot - Windows+Android. This is its value.
[Miscellaneous Android Development] nakedsoul:
Sorry to hear that your Onda is in trouble! Hope you are able to recover it.

I also have chuwi, after the retailer sent me the windows only v919 with the bios that didn't support dualos, I thought it was just not possible to get both Android and windows on v919 as I had wrong bios... until now...? Thanks again for your expertise. The Android image on v919 is very quick and smooth.

Chuwi is a nice product as well, lovely screen and excellent battery! I will look to see if you are developing any ROMs for it. I have hi12.

Thanks again ViAlexSt, you made my 2 year old dream with v919 come true!
[Miscellaneous Android Development] ViAlexSt:
I have Hibook Pro. I have run it Phoenix and MIUI (the last unfinished). For Hi12 you can find CYANOGEN here: http://www.modaco.com/forums/forum/445-other-devices/
[Miscellaneous Android Development] pouskidis:
Yep, cyanogenmod for Hi12 is an ABSOLUTELY PERFECT f/w for the tablet. I tried it and loved it! It blows away all other firmware, even marshmallow.

I only wish we could somehow import it for our 919 ch tablet. It would make many bugs go away and make it like a new tablet. I wrote to konstaT, the creator of cm mods but there is no hope of him crating a cm mode for our ONDA because he does not have a 919 ch in his possetion. I guess the same goes for you too ViAlexST.
[Miscellaneous Android Development] steve1997:
Hi everyone, I've been reading through the thread - thank you for all your hard work and efforts with this tablet!

I own a Onda V919 CH -

Windows 10 only.

I'd like to add Android as a dual boot. I've read through the posts in this thread, and it looks like it is now possible, but I don't fully understand what I need to do, to get dual boot working.

I think the tablet is quite old now, so I think I will need update the BIOS, as in post #176

However, I'm not sure which BIOS version from post #1, I would need to flash.

Also, what I would need to do once the BIOS is flashed to install Android. Would I need to flash an Android ROM, in which case, which version would I need to flash?

Sorry for lots of questions. Thanks for any help
[Miscellaneous Android Development] ViAlexSt:
What confuses you? Do as in my post - tested more than one user. The worst that can be - BIOS not will flash. Well, in that case, only the programmer.
[Miscellaneous Android Development] steve1997:
Thank you ViAlexSt! I will flash the bios linked in your post.

I was mainly confused about what comes after I follow your instructions, and flash the BIOS.

How would I add the Android ROM to the tablet, or is this included in the new BIOS?

Thank you :)
[Miscellaneous Android Development] ViAlexSt:
After flashing BIOS you have to reinstall and Android, and Windows. All operating systems are freely available - at least on the same site of official support: http://www.onda.cn/Tablet_Supports.aspx?id=321
[Miscellaneous Android Development] pouskidis:
Hi. I have a bigger problem: Suddenly, my Onda v919 CH stopped working. Meaning the boot screen is gone and it goes directly to bios only! :(

There I look for windows boot and there is none. Only UEFI boot. Does this mean my internal memory card is gone? Should I RMA it? Is there something I can do on my own? Check if I see the internal card somehow?

I always count on your thoughts ViAlexSt, I apreciate any input you may have.
[Miscellaneous Android Development] pouskidis:
Tried reappliying the mirek installation method 2. It gets intalled (managed to get into dnx boot mode) but still no boot screen. Obvioysly there is a problem with windows boot image or partition. If I install the latest f/w with method 1 and loose windows will it bring my android back? Will I have all 64 Gb in Android? If yes it is worht to try... I dont care for windows.

Otther option is if someone could prepare me a uefi boot fixing tool to use with a flash drive. Perhaps I caould fix the windows boot since I can possibly boot with a flash drive.
[Miscellaneous Android Development] ViAlexSt:
Under such force majeure circumstances you need not Mirek, it's a way of the manufacturer - in this case, all sections formated.
[Miscellaneous Android Development] pouskidis:
Will it reformat if I apply the method 1 described in the first post? If yes and I will gain al 64Gb for Android only I will try it.
[Miscellaneous Android Development] ViAlexSt:
You need to use the item 1st: "1. Brief manual based on the Chinese instructions". Will be formatted all the partitions of memory, Windows will have to be set again.
[Miscellaneous Android Development] pouskidis:
You mean I will have to reinstall windows?

Can't I just run a startup flash drive and fix the win10 boot?
[Miscellaneous Android Development] huulong111:
Dự án Mizuki Park Bình Chánh - nhà đầu tư không thể bỏ qua

Dự án Mizuki Park Bình Chánhvới quy mô hơn 26 hecta, tiềm năng đầu tư tăng giá mà các nhà đầu tư không thể bỏ qua.
[Miscellaneous Android Development] sav2880:
I am getting an error that I can't quite understand, hoping someone here can help.

I've downloaded the images, put them on a 16GB FAT32 formatted flash drive, but when I get to the EFI shell to actually kick off the firmware update, I get a message saying:

"image type x64 is not support by this ia32 shell"

Not sure what I can do to get around this message. Possibly a setting I need to change in the BIOS?"
[Miscellaneous Android Development] perama:
OTG does not working any more

Suddenly and without any particular reason, OTG does not working any more, neither on Windows nor on Android. Ten days ago, there was no problem with this function. After the last charging of the tablet, I can't read any flash drive to my tablet. Any suggestions about this problem?
[Miscellaneous Android Development] ViAlexSt:
About the missing OTG-functions work I hear the first time, usually the problem with reading sd-card. Have you tried to change the OTG cable? But in any case I have no ready solution to the problem. I admit that something burned out on the motherboard - I was convinced that the iron from Onda is very unstable.
[Miscellaneous Android Development] srclooney:
hello, i need help with onda v919 air ch, it's v7 with bios 1.17 windows 10 and android 7/29

I've bought this tablet last year, although the wifi has never worked well, for a couple of weeks it has become unusable only connects when it is near the router (less than one meter)., i've changed the internal antenna, flashed latest android, changed drivers on windows, etc... i´ve tried everything and does not improve the connection, the problem appears same in windows that in android.
[Miscellaneous Android Development] perama:
I tested three different OTG cables but nothing happened.

Do you mean that I will never have again a working OTG port? :(
[Miscellaneous Android Development] maxmobil201:
Try if it works if you have OTG cable pluged in allready when booting up - if so you got the same problem as mine (no solution found till now)
[Miscellaneous Android Development] perama:
I tried this my friend but without any luck. I thing that something doesn't function any more to my tablet. :(
[Miscellaneous Android Development] benchycool:
Hello everyone, I bought recently this tablet, the V919 AIR v9 (not CH) with android 4.4.4, as you remember this tablet don't have gapps so I tried at the first with a simple installation(obviously didn't worked) and them with adb commands I reboot the tablet in fastboot mode for install a new room without chinese apps and with gapps with mirek190 flashtools, and did a huge mistake with the room, I taked a CN room so now my tablet is in bootloop, I cannot boot in windows or android. Now I think that I have the right room but... do you know how can I get to life this tablet, please? any way to arrive to fastboot mode or similar?
[Miscellaneous Android Development] jodahush:
Bootloop after flash Android

Hi there, I am stuck.

I did the mirek190 method. First method 1 (keep Android files) and after that method 2 (delete Android files).

However during the flash those "partition", "format" etc. commands in the dos prompt result in a failure. After that the flashing was said to be ok.

But still the result is not as aspected.

The Tablet goes to the white ONDA sign and reboot.

Fortunately windows works still fine.

Another thing. I can not go to the fastboot with vol + and - and power. Instead I go with power and vol + in a dual boot screen. From there with power and vol - in this comand prompt recovery like screen with fastboot. A flash is possible but then finally the boot fails. I used the latest rom.

What can I do from here?
[Miscellaneous Android Development] ViAlexSt:
This action is only possible when Android is "alive".

Reinstall Android of the standard "chinese" way, and then reinstall Windows.
[Miscellaneous Android Development] jodahush:
Hi Alex, I ve got the feeling I used the wrong firmware. I have the dual boot ONDA v919 but without "ch"!
[Miscellaneous Android Development] ViAlexSt:
I suspected it. Air 919 and Air 919 CH - completely different devices. And there are other varieties of Air 919: 919 3G Air, 919 Air 3G (octa core), 919 Air (quad core) and on, and on ...
[Miscellaneous Android Development] jodahush:
OK thanks.
[Miscellaneous Android Development] nikcamelot:
help installation

I tried to install android with method 2 but my tablet went to bootloop ... now i do not log in to recovery and when I try to reinstall the screen coming out in FLASH.bat which fails every install or the tablet is not recognized. .. to troubleshoot the problem I tried method 1 but pressing F7 in the nda screen does nothing and returns to bootloop

creating boot image...

creating boot image - 4788224 bytes

downloading 'boot.img'...

FAILED (data transfer failure (Too many links))

finished. total time: 0.107s
[Miscellaneous Android Development] ViAlexSt:
I guess another mistake in choosing topic/determination device. You sure you have the tablet 919 Air CH?
[Miscellaneous Android Development] nikcamelot:
How i know my version?
[Miscellaneous Android Development] ViAlexSt:
On the back cover should be written "V919 Air CH".
[Miscellaneous Android Development] nikcamelot:
is write V919 3G AIR...how i can solve this problem now?
[Miscellaneous Android Development] ViAlexSt:
To install the firmware Android for your device. Onda V919 3G Air with dual boot exists in two versions: SOC Intel Atom Z3735F or Intel Atom Z3736F. Clarify the details may here: DeviceSpecifications.

The firmware is on NeedRom, but I don't know what varieties. I never had these devices.
[Miscellaneous Android Development] josecostas:
Hi. I have this tablet for almost a year. Until now it worked fine, but since a few days ago the speed of Wifi has decreased a lot. The signal receives it well (I have seen it with Wifi Analyzer) but the speed is very slow. It is not Wifi problem because in my smartphone it works perfectly.

Another problem that I have, although this one since I bought it, is that I do not recognize any SD Card.

Any solution?

Thank you
[Miscellaneous Android Development] Jakkeboi:
Can confim that you can Install Android on V1 version.

I Have V1 version with Windows 10 only. I updated my bios to Y05DV117 (link 1), after which there appeared dual boot possibility at startup. Then I just followed the insrtuction #1.:

format the flash drive to FAT32 in windows.

copy to the full content of V919 AIR CH(original)-20160729.zip to the the flash drive root (extraced) (link2)

turn off the tablet*, via OTG-adapter to connect to the device USB-hub with keyboard and your prepared flash drive;

turn on the tablet, when the Onda logo appears, press F7 on USB-keyboard to bring up the boot menu;

in the list to select your flash drive and press Enter - the installation process will begin automatically, takes approximately 2-3 minutes.

Thats it. Worked on my windows 10 only V1 version. Sound, wlan works.

Link 1 (bios Y05DV117 ): https://xdaforums.com/android/development/rom-onda-v919-air-ch-dualos-android-t3375660/page18

Link2 https://androidfilehost.com/?fid=385035244224386725
[Miscellaneous Android Development] Jakkeboi:
MIN Brightness goal failed.

Can confirm: vi10plus-fix-minbrightness.zip breaks the brightness settings. Tablet worked throught the hdmi and when turned some brigtness there, tablets screen started working, but there was only 1 brightness setting. vi10plus-fix-minbrightness-RESTORE.zip fixes this.

Is there any way to lower the brightness settings?
[Miscellaneous Android Development] Hopo83:
Touch screen update before flash

I followed the instructions to flash my V919 v1 however I updated the touch screen driver in device manager prior to flashing and when it booted the touch screen is working. I did have an otg cable and mouse plugged in also though, just in case. Running windows version 1709 prior to flash and installing tough screen driver.

Sound, bluetooth, side buttons and capacitive windows logo all working.
[Miscellaneous Android Development] petranb:
Problem Flash

I try 4 times 20160216 and 20160307 but can't make it because all the time says:

Failed to locate emmc device path for specified controller: Not found.

Flash failure : Not found.
[Miscellaneous Android Development] tsotzo:
only win version to dual OS

Hello, I am going to buy the ONDA v919 z8300 64/4 gb only windows version. Can I reformat it to dual os w10/5.1? If yes could you please link the tools/instructions? Many thanks in advance!
[Miscellaneous Android Development] 0339:
Hello,

I flashed the BIOS as described in the link of the first page (Y05DV117, formerly ver 1.05 I think). My sound is back on both Android and Windows. But now I got a problem with my SD Card Slot. I could use it before but now I can't get it to work again. I tried everything that I could find on the net and here: SD Card Driver sdbus.sys/dumpsd.sys substituted (worked but error, also completely deleted from system), changed BIOS setting "Custom SDBUS driver" on "Enabled" and "Disabled" etc., changed some settings to PCI Mode (so my WIFI was displayed as an removable stick) back and forth, formatted a 256GB SDXC and a 32GB SDHC with exFAT and NTFS ... I downloaded nearly every build I could find and installed it, Android, Windows 10 and RemixOS 2.0 ... the same problem everywhere. I can't get it to work, Android seems not get write permission on SD for formatting as well (although this release here said that it would fix this problem - detection and format loop).

Since I can't get into baidu, I searched the whole net for older BIOS versions to get the SD Card back... no luck. The Onda Forum is gone and the cache files didn't give me any hint. If I have to choose between sound and SD Card I would prefer to get the SD Card back, the speakers are bad anyway.

My tablet is an Onda v919 Air CH Gold Black V7

Thank you for any help in advance.
[Miscellaneous Android Development] ViAlexSt:
Problems with the SD-slot are common for Chinese dual-boot tablets. Long time I don't have tablet Onda, but the topic on the Russian forum 4pda a lot of messages about the death of SD slot, even without flashing the BIOS. As far as I remember, roll back with 14th version of BIOS (Y05DV117) is impossible. I suppose it's an "iron" problem, you'll have to get used to external USB flash drives. Like me on my Chuwi tablet....
[Miscellaneous Android Development] tyrekika:
no windows or android v919

hello all, my son has a onda v919 32GB AIR S/N:v919lbfbv8bo7406 i think he has wiped both win 10 and android messing about with it. i can get it to the bios page using keyboard but the tab will only show dark screen with onda logo on front that sometimes flickers and on a few occasions i have got to a screen with windows symbol and a android bot but just goes to dark screen/logo.please help i cannot afford to buy him another. lee
[Miscellaneous Android Development] MoshVP:
Hi! You need to reflash and you will be happy
[Miscellaneous Android Development] tyrekika:
re flash V919 none 3g model

hi do you or does anyone know of a good set of insructions or video on how re flash v919 version 5 none 3g model. i have searched for weeks now no look at tutorial
[Miscellaneous Android Development] MoshVP:
hi, Look at here. This is a similar site: 4pda.ru/forum/index.php?showtopic=703215 (only in Russia). Perhaps you will find here how and what is better to flash. good luck.
[Miscellaneous Android Development] achodemo:
Same error to me. Any suggestions or solution? Why do that happen?? :crying:
[Miscellaneous Android Development] mimicoco:
salve, ho questo tablet v919 ch air solo sistema operativo windows , s\n V5 , bios Y05W012Ployer_x64. come posso aggiornare, ho problemi con win10. grazie
[Miscellaneous Android Development] EleJota:
a few days ago update windows 10 and now the tablet is in a continuous boot loop, I tried to flash and I get the error:

Failed to locate emmc device path for specified controller: Not found.

Flash failure: Not found.

Any idea?? Thanks!
[Miscellaneous Android Development] as1983:
Two years later the same question interests me. Four years ago I bought the tablet with Windows only and in the past I have flashed a dual-OS version (which one I don't know anymore). After a Windows reset I now only get to the start screen, which allows the choice between Windows and Android. After that nothing happens anymore. No matter what I choose.

Can I use the firmware version from this thread and how do I get into installation mode without OTG adapter?

Would be grateful for your help! Thanks a lot!
[Miscellaneous Android Development] aedthuio:
Hi guys! Is it possible to resize the Android system parition?

Thank you
[Miscellaneous Android Development] monakh:
What he said +++

I would like to remove the Windows partition and use just Android. Any luck with this?
[Miscellaneous Android Development] dmitry251190:
Hello! There is an Onda V919 Air CH v8 tablet, the bootloader flew off, when the tablet loads, only the EFI Shell is displayed or sometimes a white blank screen without windows or android icons.

1) I tried to reinstall only Android on the built-in emmc memory, it is displayed when installing a clean android, and shows that there is free space in the internal memory of 64 GB, but android but the internal memory is not installed writes the error Cannot mount /dev/mmcblk0. How and how can I mount the internal memory so that a clean android is installed on it and loaded from it?

2) I tried to install different Android firmware via USB for this version of the tablet, but an error occurs all the time when executing startup.sh Image type x64 is not supported by this ia32 shell. How can this be fixed? The built-in memory has ext4 format.

3) I tried to install android on a micro sd memory card, pre-formatted the memory card in ext4, android is installed on the memory card, but does not start. Is it possible to run the android OS installed on the memory card from the Efi shell or install windows on the tablet without errors?

Windows is not installed, it gives the error the virtual disk controller is not found. I tried different versions of windows 10 sometimes gives an error when installing not enough disk space shows when installing windows only 7 GB of spare space, although it should be 64 GB. I thought to flash the tablet from a Windows PC, but Fast Boot Android does not enter the boot menu when the power and volume buttons are pressed.

There is no access to baidu, to download other firmware.

How to solve the problem with android is very necessary, please help!!!
[Miscellaneous Android Development] ViAlexSt:
In any case, to revive the tablet, you need to use the official stock firmware. If the internal memory is alive. I haven't had the Onda for a long time, I don't remember everything, but if the Android isn't installed from a USB flash drive, then you can try the Windows flasher. There are 2 varieties of it in the archive, with the drivers. Try.... and good luck.
[Miscellaneous Android Development] dmitry251190:
And if it does not boot into fastboot mode on the tablet, you can still use the windows firmware?
[Miscellaneous Android Development] ViAlexSt:
I don't remember all the details of how to use Intel Phone Flash tool. You can find instructions on the Internet, for example: https://rootmygalaxy.net/how-to-install-stock-rom-on-intel-phones-with-intel-phone-flash-tool/

But in any case, Android first, and then Windows. Can't do the opposite. The bootloader (efi) is installed only with Android.
[Miscellaneous Android Development] soochowgreen2022:
Hi, ViAlexSt, after flashed the V117 version in the BIOS of my V919 AIR CH V1, I flashed

Android fireware (V919 AIR CH 中性固件（适合014版本以上BIOS）-20160729) ,then installed win10 (Onda's official website : V919 AIR CH DUALOS Windows10（TH2）系统镜像-20160304 ),

Now Bluetooth, WIFI are all good, but the Win10 touch screen cannot be used.

I remember that the touch screen can be used when you just flash finished win10, but it is useless to turn on the screen after turning off the screen again.

I tried disabling the driver signature enforcement in Win10 and installed the touch driver, but it still doesn't work.

Do you have solution for this issue ? Thank you very much .
[Miscellaneous Android Development] ViAlexSt:
I can only suggest trying to install the touch drivers, I haven't had Onda for a long time, I can't help with anything else:
[Miscellaneous Android Development] soochowgreen2022:
Thanks ViAlexSt for such a quick reply.

Yes, I have installed the V919 AIR CH touch driver (2016-09-12) on the official website of Onda , but I install completed and restarted, it still has no effect.

Thank you for your provide file z8300_touch_drivers_x64, is it applicable to V919 air CH ?

OK, I'll try to install and test it .

Thank you very much.
[Miscellaneous Android Development] ViAlexSt:
Yes
[Miscellaneous Android Development] Im-Kane:
This tutorial is great! but much to my regret I can't do anything since I don't have access to the Android part, I can only enter the BIOS with the keyboard. I can't start either Windows or Android, I can select the boot options (UEFI, BIOS or PENDRIVE) by pressing F7 but nothing else, neither Windows nor Android starts, it restarts constantly, I have tried to start by pressing the different buttons but it restarts anyway.

Can anyone help me or tell me if I can get it back? thank you!

EDIT

My tablet is an onda v919 air dual OS v9
[Miscellaneous Android Development] ViAlexSt:
Maybe try reinstalling Android? Only use the full stock firmware.