- Device Specific Changes
Etude kernel: Op.13 No.2
Linux 4.9.337. The 4.9 kernel reached EOL from upstream stable kernel release.
built with the latest LLVM Clang 16
backported configurable per-cgroup PSI tracking
guarded a deprecated clang-specific auto zero variable initialization flag
a few fixes for compressed apex and encryption
picked a few fixes for qcacld and sdcardfs
changed f2fs defaults to match the default tuning values in AOSP
aligned Clang ThinLTO flags with mainline kernel to take advantage of thinlto-cache
link vdso32 with -z noexecstack to avoid warnings in bfd from the latest GNU binutils
DO NOT use another kernel. Just don’t.
Disabled per-cgroup PSI accounting to avoid performance overhead because android does not need it
Enabled compressed apex
Fixed carrier video calling by adding the missing [email protected]
Significantly simplified the system-side IMS blobs
Overrode Pixel thermal HAL service initialization to fix boot issues after android 13 QPR1 merge
- ROM Side Changes
January security patch
GApps updated from QPR1 and later builds
We did several changes to try fixing the screen stutter and battery drain caused by Pixel Launcher. If the issue persists for you, try uninstalling previous updates of Android System Intelligence or even do a clean flash. Disabling search related features in launcher settings may also help.
- PE recovery is REQUIRED
DO NOT use any other recovery
Partition scheme has been switched to retrofit dynamic partitioning because polaris is running out of system partition space. No actual re-partition is involved. Instead, the physical system and vendor partition is mapped together to form a logical “super” partition. The size of super partition equals the sum of the physical system and vendor partitions. After that, logical system and vendor partitions are created on top of this super partition. In this way, we are essentially redistributing space between the physical system and vendor partition to accommodate for the increase in size of system libraries and prebuilt apps.
The firmware is included with a different keymaster.img from perseus. DO NOT flash your own firmware.
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 the previous PE 13 builds. You can dirty flash PE 13 Plus on top of the regular PE 13.
You cannot upgrade from android 12 builds. Formatting data is required.