Featured image of post PixelExperience 12 BETA 20211128-0611 Official Polaris Build

PixelExperience 12 BETA 20211128-0611 Official Polaris Build

Initial PE 12 BETA official release, USB DAC fix, kernel update, and misc improvements.


  • 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/OrangeFox on PE12.
  • You can dirty flash from my previous PE 12 ALPHA builds.

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 in your cmd/powershell/terminal and wait until it finishes
  • Reboot to system

Device Specific Changes:

  • Etude kernel:
    • Linux 4.9.290 and CAF tag LA.UM.9.8.r1-04200-SDM710.0
    • brought back RT group sched
    • DO NOT use another kernel. Just don’t.
  • Fixed audio playback on some external USB audio adapters with DACs
  • Excluded CarrierConfig from RRO overlay to avoid stripping xml attributes
  • Dropped qcom wifi display blobs for now because we are using AOSP wfd
  • Brought back tether offload config interface
  • All changes from previous ALPHA builds

ROM side updates:

  • Initial PE 12 BETA release based on android 12 November security patch
  • Goodies from Pixel 6
  • Many clean ups from ALPHA builds
  • Increased the supported wfd resolution and framerate to 1080p@60fps

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.

Licensed under CC BY-NC-SA 4.0
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