GSI 12 alioth Files

Download system.zip and unzip it to a new folder

Steps for flashing:
Download platform tools from google, unzip them, open unzipped folder , open terminal inside - right click inside folder ( Windows: right click + shift ) then click open terminal/command window/powershell:

./fastboot reboot fastboot ( This is a must , before this reboot phone , hold power down while rebooting to enter fastboot and then issue this command )
./fastboot --disable-verification flash vbmeta ( Drag and drop vbmeta.img from GSI folder to terminal )
./fastboot erase system
./fastboot flash system ( Drag and drop system.img from GSI folder to terminal )
./fastboot -w
./fastboot reboot


Downloaded GSI from: https://developer.android.com/about/versions/12/gsi-release-notes
Image later processed:

Opwn terminal in GSI folder
mkdir system
fallocate -l 5G system.img
fallocate -l 5G system.img
e2fsck -y -E unshare_blocks system.img
sudo mount -t ext4 -o loop system.img system
sudo nautilus - locate the folder where you unzipped the GSI

edit build.prop to add these lines OR use buid.prop provided below to replace the whole file:
ro.audio.ignore_effects=true
debug.hwui.renderer=vulkan
dalvik.vm.image-dex2oat-Xmx=128m
dalvik.vm.dex2oat-Xmx=2048m
pm.dexopt.first-boot=speed
pm.dexopt.boot=speed
pm.dexopt.boot-after-ota=speed
pm.dexopt.post-boot=extract
pm.dexopt.install=speed
pm.dexopt.install-fast=speed
pm.dexopt.install-bulk=speed
pm.dexopt.install-bulk-secondary=speed
pm.dexopt.install-bulk-downgraded=speed
pm.dexopt.install-bulk-secondary-downgraded=extract
pm.dexopt.bg-dexopt=speed
dalvik.vm.minidebuginfo=false
dalvik.vm.dex2oat-minidebuginfo=false
persist.traced.enable=0

sudo umount system
e2fsck -yf system.img
resize2fs -M system.img
e2fsck -yf system.img

That's it. As far as I know everything works , magisk should work as well as long as you followed steps and didn't delete logic parition by following some other guide

- to enable 120fps wait for phone to boot up . Enable USB debugging , connect to pc and issue these:

./adb shell settings put system peak_refresh_rate 120
./adb shell settings put system min_refresh_rate 120