Do not try to sync / notify the failure when device is offline

[dylanbob]

Hi
First of all, thank you for your amazing work.

This is kind of a feature request. I have been using your app for a few years now with my own personal nextcloud server on a dedicated server.

I switch to airplane mode often. Each time I do, I get notified by the davsync app that sync failed. When I open the app, I can see that it knows that my android device is on airplane mode.

Why is the app trying to sync when the device is completely offline? I know you can still enable wi-fi when in airplane mode, but wouldn't that be possible for the app to acknowledge that the device is completely offline and thus NOT try to sync? That would save battery, cpu and human attention (no annoying error notifications).

I am using the app on both a samsung galaxy A41 and a samsung galaxy tab S7+

[rfc2822]

Hi,

The sync is currently not started/managed by DAVx5 itself, but by the Android sync framework. This framework requires Internet connection before it will initiate a sync. So if you're in airplane mode, DAVx5 should not sync automatically… very strange.

Can you provide steps to reproduce? Is it enough to go to airplane mode and wait?

[dylanbob]

Yes. Steps to reproduce:

• check that davx5 notifications are activated and not silenced
• change the account sync time to the minimum 15 minutes on calendars (so that the bug occurs more quickly)
• go to the main menu and check that the device is NOT currently syncing account(s), or wait until the sync finishes
• activate airplane mode and then check that your device is really offline
• (at this point you can go to the device home/launcher or even lock it) wait until you get the error notifications for calendars, one by one (for me it occurs after a few minutes)

[rfc2822]

Seems that the device then ignores airplane mode for the sync framework. Which device / Android version?

[dylanbob]

• Samsung Galaxy A41 (SM-A415F/DSN) up to date Android 11 One UI 3.1
• Samsung Galaxy Tab S7+ (SM-T976B) up to date Android 12 One UI 4.1
  I also had the same problem on my previous smartphone (Nokia 7.1 up to date) and tablet (Samsung Galaxy tab S3 4G up to date)

[rfc2822]

Can you turn on verbose logs and then put it to airplane mode, wait until the notification appears and post the anonymized logs here (or upload them here if they contain private data: https://www.davx5.com/support)?

[dylanbob]

I have sent the requested redacted logs using the support page with name 'dylanbob' and referencing this discussion

[kleinarne]

I get a lot of that error because I have a locally hosted NextCloud instance that is only available in my local network. When I leave the house, syncs (that take a rather long time because I sync years of past events) get interrupted resulting in errors, even though DAVx⁵ is set to snyc only in my WiFi network.

Is there any way of suppressing these errors if the network connection changes, or is that also handled by the sync framework?