When creating snapshot: dbus.exceptions.DBusException: error.unknown_config: org.freedesktop.DBus.Error.Failed

[jbrepogmailcom]

This error I get when I try to create btrfs snapshot.

[PotcFdk]

First reported here

[ricardomv]

You need to provide more information on the issue. Are you able to create snapshots using the command line interface?

[AlexanderGabriel]

I installed a new Debian 11.4 on a VM and tried snapper-gui.
Had the same error when trying to make a snapshot with snapper-gui. no matter if i uesed the debian package or the latest git, i got the folllowing error:

Traceback (most recent call last):
File "/usr/local/lib/python3.9/dist-packages/snappergui/mainWindow.py", line 94, in on_create_snapshot
newSnapshot = snapper.CreateSingleSnapshot(dialog.config,
File "/usr/lib/python3/dist-packages/dbus/proxies.py", line 141, in call
return self._connection.call_blocking(self._named_service,
File "/usr/lib/python3/dist-packages/dbus/connection.py", line 652, in call_blocking
reply_message = self.send_message_with_reply_and_block(
dbus.exceptions.DBusException: error.unknown_config: org.freedesktop.DBus.Error.Failed

I was able to make a snapshot with btrfs command:
root@btrfs:~# btrfs subvolume snapshot / /test
Create a snapshot of '/' in '//test'

So i tried to use snapper and there was no config at snapper list-config. After i created one, it worked.

Maybe you can catch this error or disable the snapshot function and tell the user to first create a config before opening the create snapshot dialog.