Hovatek Forum DEVELOPMENT Android SPD ResearchDownload/UpgradeDownload tools reject custom files for flashing
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SPD ResearchDownload/UpgradeDownload tools reject custom files for flashing

SPD ResearchDownload/UpgradeDownload tools reject custom files for flashing

Bergamot
Bergamot
Bergamot
Enthusiastic Member
6
09-10-2022, 07:18 PM
#1



Hi, I'm trying to flash TWRP image made with Hovatek auto porter onto INOI 2 Lite 2021 (sp7731e). When download process gets to recovery.img, it fills progress bar, hangs there for a few seconds, then aborts with "downloading failed: wait input time out".
I also tried flashing blank vbmeta, it hangs on this file then fails as well. Any original files are getting flashed correctly. If I flash my stock .pac without any modifications, all goes well. ResearchDownload/UpgradeDownload tools are also of their latest versions.
What could be wrong?
Gargoyle
Gargoyle
Gargoyle
Contributor
505
10-10-2022, 12:20 AM
#2
You need to sign twrp recovery create your own vbmeta.

How to use AVBtool and a private key to sign a Unisoc (SPD) image.
https://www.hovatek.com/forum/thread-32674.html

How to create a custom signed vbmeta.img for Unisoc using AVBtool.
https://www.hovatek.com/forum/thread-32664.html
Bergamot
Bergamot
Bergamot
Enthusiastic Member
6
10-10-2022, 12:59 PM
#3
(10-10-2022, 12:20 AM)Gargoyle You need to sign twrp recovery create your own vbmeta.

How to use AVBtool and a private key to sign a Unisoc (SPD) image.
https://www.hovatek.com/forum/thread-32674.html

How to create a custom signed vbmeta.img for Unisoc using AVBtool.
https://www.hovatek.com/forum/thread-32664.html
Both guides mention that I need to have bootloader unlocked. I can't unlock it due to lack of OEM's private key
Gargoyle
Gargoyle
Gargoyle
Contributor
505
10-10-2022, 09:40 PM
#4
(10-10-2022, 12:59 PM)Bergamot
(10-10-2022, 12:20 AM)Gargoyle You need to sign twrp recovery create your own vbmeta.

How to use AVBtool and a private key to sign a Unisoc (SPD) image.
https://www.hovatek.com/forum/thread-32674.html

How to create a custom signed vbmeta.img for Unisoc using AVBtool.
https://www.hovatek.com/forum/thread-32664.html
Both guides mention that I need to have bootloader unlocked. I can't unlock it due to lack of OEM's private key
Unlocked bootloader is not that necessary, I have rooted two Unisoc devices with locked bootloader, but the OEM key is necessary, if rsa4096_vbmeta.pem doesn't work to sign boot, recovery and vbmeta, I think you won't get any further, the OEM key will certainly not be provided by the manufacturer.
hovatek
hovatek
hovatek
Administrator
49,617
12-10-2022, 05:15 PM
#5



(10-10-2022, 09:40 PM)Gargoyle Unlocked bootloader is not that necessary, I have rooted two Unisoc devices with locked bootloader, but the OEM key is necessary, if rsa4096_vbmeta.pem doesn't work to sign boot, recovery and vbmeta, I think you won't get any further, the OEM key will certainly not be provided by the manufacturer.

I think this would only apply for brands that signed images using the generic keys. Could you share the models?

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Gargoyle
Gargoyle
Gargoyle
Contributor
505
13-10-2022, 10:02 AM
#6
(12-10-2022, 05:15 PM)hovatek
(10-10-2022, 09:40 PM)Gargoyle Unlocked bootloader is not that necessary, I have rooted two Unisoc devices with locked bootloader, but the OEM key is necessary, if rsa4096_vbmeta.pem doesn't work to sign boot, recovery and vbmeta, I think you won't get any further, the OEM key will certainly not be provided by the manufacturer.

I think this would only apply for brands that signed images using the generic keys. Could you share the models?

Of course, provided that the manufacturer uses generic keys.

My tablet devices:
1) iGET SMART L203 / Unisoc SC9863A
2) iGET SMART L206 / Unisoc UMS512_Tiger T610
No need for an unlocked bootloader.
hovatek
hovatek
hovatek
Administrator
49,617
14-10-2022, 07:31 PM
#7
(13-10-2022, 10:02 AM)Gargoyle Of course, provided that the manufacturer uses generic keys.

My tablet devices:
1) iGET SMART L203 / Unisoc SC9863A
2) iGET SMART L206 / Unisoc UMS512_Tiger T610
No need for an unlocked bootloader.

Thanks

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