Version 42.3 did fix an error with scheduled backups to encrypted drives! I suspect that might be what you're hitting? Can you try the snap and see if that fixes things? Might want to make a manual backup first just to confirm everything is working.
snap install deja-dup --classic sudo apt remove deja-dup Maybe we should backport that patch to 20.04. ** Changed in: deja-dup (Ubuntu) Status: New => Incomplete -- You received this bug notification because you are a member of Desktop Packages, which is subscribed to deja-dup in Ubuntu. https://bugs.launchpad.net/bugs/1901340 Title: Backup doesn't automatically start when drive is inserted Status in deja-dup package in Ubuntu: Incomplete Bug description: I have Deja Dup set up to automatically backup onto a removable drive encrypted with LUKS every day. Each morning I would get a notification saying that the backup will automatically start when the drive is connected. When I insert the drive, it is automatically unlocked since I have the password saved on the computer. But after waiting for around half an hour the backup doesn't seem to have started. When I open Deja Dup it says that the last backup was yesterday and the next backup is today. Clicking the Back Up Now button starts the backup. The drive is GPT partitioned with a single partition containing ext4 inside LUKS. ProblemType: Bug DistroRelease: Ubuntu 20.10 Package: deja-dup 42.2-1ubuntu1 ProcVersionSignature: Ubuntu 5.8.0-25.26-generic 5.8.14 Uname: Linux 5.8.0-25-generic x86_64 ApportVersion: 2.20.11-0ubuntu50 Architecture: amd64 CasperMD5CheckResult: skip CurrentDesktop: ubuntu:GNOME Date: Sat Oct 24 11:09:42 2020 ExecutablePath: /usr/bin/deja-dup InstallationDate: Installed on 2020-10-20 (4 days ago) InstallationMedia: Ubuntu 20.04.1 LTS "Focal Fossa" - Release amd64 (20200731) ProcEnviron: SHELL=/bin/bash XDG_RUNTIME_DIR=<set> PATH=(custom, user) LANG=en_US.UTF-8 SourcePackage: deja-dup UpgradeStatus: Upgraded to groovy on 2020-10-23 (1 days ago) To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/deja-dup/+bug/1901340/+subscriptions -- Mailing list: https://launchpad.net/~desktop-packages Post to : desktop-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~desktop-packages More help : https://help.launchpad.net/ListHelp