Note

• Formatting data with PE recovery is REQUIRED for clean flash
  • DO NOT use any other recovery
  • The firmware is included with a different keymaster.img from perseus. DO NOT flash your own firmware.
  • Keymaster is bumped to 4.0 for encryption, and cust partition is mounted as /metadata. You WILL NOT be able to boot TWRP on PE12. OrangeFox R11.1_1 or newer can boot but is not capable of decrypting the data partition.
  • To switch to other ROMs, format data in PE recovery first, and then install another recovery. You may need to re-flash the required firmware, if the ROM you are going to flash does not include one.
• You can dirty flash from my previous PE 12 builds.
• You cannot upgrade from android 11 directly. Formatting data is required.

PE recovery flash guide

• Download PE recovery from the official PE website
• Boot your phone into fastboot mode. You can either
  • hold power + volume down button
  • or adb reboot bootloader
  • or use the Reboot to bootloader option in TWRP/OrangeFox
• Connect your phone to a computer
• Run fastboot flash recovery pe_recovery_file_name.img in your cmd/powershell/terminal
• Hold power + volume up to boot into recovery

PE 12 flash guide

• Boot into PE recovery
• Select Factory reset" --> "Format data/factory reset. You phone should say that /data, /cache, and /metadata have been formatted.
• Go back to main menu and select “Apply update” –> “Apply from ADB”
• Connect your phone to a computer
• Run adb sideload pe_rom_file_name.zip in your cmd/powershell/terminal and wait until it finishes
• Reboot to system

Device Specific Changes

• Etude kernel: Op.12 No.2
  • Linux 4.9.303 and CAF tag LA.UM.10.3.r1-00900-sdm845.0
  • removed 2 bytes of padding in network buffers
  • upstreamed generic locking/refcount from 4.14
  • ported arm64-specific fast refcount checking
  • enabled HID WACOM driver
  • wireguard 1.0.20211208
  • DO NOT use another kernel. Just don’t.
• Brought back qcom wfd implementation
• Properly disabled surfaceflinger backpressure propagation to reduce jank in certain scenarios
  • we had it disabled on android 11, but a change in surfaceflinger property on android 12 accidentally enabled it again
• Updated adreno blobs from LA.UM.9.3.r1-02700-sdm845.0
• Updated parts to newer APIs like TaskStackListener and TaskInfo
  • also fixed some harmless log spams caused by SElinux
• Whitelisted an intent broadcast for the new ims.apk
• Dropped obsolete eBPF prop
• Implemented a boost after fingerprint authentication to speed up the unlocking process and avoid animation janks

ROM Side Changes

• February security patch
• Brought back Face Unlock, and it also works in apps using the standard biometric authentication mechanism
• Translation updates and misc bug fixes

Known Issues

• Rounded corners are broken. It does not seem to be an issue on the device side, as debug info reports correct values

Download | XDA thread

Please report issues to jjpprrrr.