btw: “adb logcat” shows following short after phone restart:
07-30 11:11:30.676 4600 4787 I BackupManagerService: Starting service for user: 0
07-30 11:11:30.676 4600 4787 V BackupManagerService: [UserID:0] Starting with transport com.stevesoltys.seedvault.transport.ConfigurableBackupTransport
07-30 11:11:30.677 4600 4787 D BackupManagerService: [UserID:0] Started thread backup-0
07-30 11:11:30.701 4600 4787 E BackupPasswordManager: Unable to read backup pw version
07-30 11:11:30.701 4600 4787 E BackupPasswordManager: Unable to read saved backup pw hash
07-30 11:11:30.728 4600 4787 V BackupManagerService: [UserID:0] No ancestral data
07-30 11:11:30.737 4600 4787 I BackupManagerService: isBackupEnabled() => false due to absent settings file
07-30 11:11:30.737 4600 4787 D BackupManagerService: user:0 readBackupEnableState enabled:false
07-30 11:11:30.737 4600 4787 I BackupManagerService: [UserID:0] Backup enabled => false
07-30 11:11:30.737 4600 4787 D BackupManagerService: user:0 writeBackupEnableState enable:false
found also that now while grep through “adb logcat”
07-30 16:58:41.867 18347 18347 W ProcStatsManager: No process com.stevesoltys.seedvault/10127 for service com.stevesoltys.seedvault.transport.ConfigurableBackupTransportService
Ok I misunderstood. Thanks for pointing that out: it indeed seems that there may be this issue for the devices that are have not been reset after we integrated Seedvault. We’ll look for a solution.
btw: seedvault is not required, it may just be a convenient way to backup & restore apps and some data. It is still possible to backup all important data (photos and so on), and restart from scratch. Also note that some apps cannot be backed up by seedvault.
A ‘clean install’ of build iode-3.1-20220726-starlte including SeedVault v12-3.0
that would be great, meanwhile I did a factory reset on my test phone and confirm that “Backup” appears then. So it’s related to my productive long running S9, which afair had never a factory reset between all the updates and sidegrades LOS (dropped support) → e/OS (stayed on Android 10 at the time) → iode (available Android 11).
After updating from 2.6 to 2.7 it still not appears 
Is there still something on the roadmap for 2.x or is the install of (now 3.2) and reconfigure from scratch the only option?
“Seedvault” is still not visible in 2.9, can I run some steps on non-rooted phone using “adb” to enable it?
Let’s have a look in settings/apps/all apps/show system apps/ → serach for seedvault
Must be there
Or
adb shell ‘pm list packages -f’ | sed -e ‘s/.*=//’ | sort | grep seedvault
Should shown as com.stevesoltys.seedvault
If it is there but you cannot see it in settings/system/backup then something is wrong with the overlay
UI: Settings → Apps → Search for “Seedvault” → found with status:
- not able to to deactivate
- able to force stop
unlike other apps unable to “open”
adb shell 'pm list packages -f' | sed -e 's/.*=//' | sort | grep seedvault
com.stevesoltys.seedvault
So it’s available, but somehow invisible and unable to start/open via UI.
Can I start/open it using adb?