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This repository was archived by the owner on Jan 27, 2025. It is now read-only.
This repository was archived by the owner on Jan 27, 2025. It is now read-only.

can't flash vbmeta, or can't boot GSI - unisoc device sc9863a #1602

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@mccalas89

Hi, I have a Blu V70 (same hardware/software as G60 - device codename G0270WW) with a Unisoc sc9863 processor. I unlocked bootloader using a modified fastboot posted on hovatek.com and used the signidentifier token to do so. In order to root with Magisk, i had to patch the recovery.img (my ramdisk in recovery), create a custom signed vbmeta.img, and then flash both before device would accept.

I wanted to try running GSI rom (my device is Treble enabled, slot A only, system-as-root), but I have been unable to do so. I have followed the instructions from many different places (various XDA threads, google's GSI page), but I can't seem to get things to work.

  1. my device will not accept any vbmeta.img that's not 1024 kB : after 'fastboot flash vbmeta vbmeta.img', with or without --disable-verifty/verification, fastboot hangs on "writing vbmeta." This seems to be an issue with this vbmeta being unsigned or not being the expected size. Neither will it accept a stock vbmeta.img with "--disable-verity" or "--disable-verification". However, if i pad a blank vbmeta (or another that comes with google's android gsi-pie image, for example) to match the stock size, THEN i can flash vbmeta (and was able to --disable-verification).

  2. without flashing vbmeta.img, the GSI system.img flashes, but bootloops (very quickly i might add, it briefly hangs for a second on boot, then reboots). with flashing a vbmeta (a blank padded one) the GSI system flashes, but bootloops again (slightly differently. it hangs for 5-10 seconds on boot, then reboots).

Does anyone have any suggestions? Ideas? I hope this is an ok place to ask, wasn't sure where to go. Thanks for any help.

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