Okay, thank you for info. After small digging in logcat I’ve found this line:
I/CalendarProvider2(16593): Sending notification intent: Intent { act=android.intent.action.PROVIDER_CHANGED dat=content://com.android.calendar }It repeats every minute and invokes android.content.syncmanager.SYNC_ALARM. I don’t know why CalendarProvider2 sends this notifications, so I suppose that turning calendar sync off is the best solution. Or maybe I’ll try to remove apps one by one…
Thank you again for your time.