That’s the reason why I only mentioned uncompressed backup in my post. Compression (well, at least gzip that I’ve tried) is quite slower and doesn’t seem to be helping much.
I don’t remember having seen any banding since I started using Android 12 (along with Android 12 binaries), but I haven’t tested it with nightish. I’ll give it a try.
Well, I’ve only ever used A12 binaries together with Android 12 OS as base for SFOS (and that was actually the reason of using them - to have a matching pair), so I can’t tell how they behave on top of Android 11.
Anyway, as I wrote earlier, I actually haven’t noticed any improvements that would result from changing the binaries because all fixes (including the echo issue, banding/color tint and fingerprint sensor functionality) apparently come from upgrading the underlying Android OS to version 12 or 13, and not the binaries. So I guess it is OK to just stick with Jolla recommended A11 binaries, or in case of using Android 12 as base OS for SFOS one may also use A12 (v2a) binaries to have a matching pair that may POSSIBLY give some advantages (or not ) but in that specific combination (Android 12 62.1.A.0.675 as underlying OS, Android 12 v2a binaries) after weeks of tests don’t seem to be causing any issues.
You do need to reinstall SFOS prior to restoring the backup in the case that you wiped the existing SFOS installation (e.g. by reflashing Android using EMMA). Or in such case you need to at least manually flash the remaining partitions that SFOS uses, which are not in your /dev/sda79 backup (that only contains rootfs and home). Namely:
fastboot flash boot_a hybris-boot.img
fastboot flash boot_b hybris-boot.img
fastboot flash dtbo_a dtbo.img
fastboot flash dtbo_b dtbo.img
fastboot flash oem_a Sony_binaries.img