'Backup Failed' message when external backup drive first inserted

[Tom Wright]

An error message entitled 'Backup Failed' with the text 'An operation is already pending' is displayed when I first plug in by external backup drive and Deja Dup attempts to perform a scheduled backup, although it succeeds on subsequent attempts (either scheduled or manual).

The fstab entry for the drive is as follows:
/dev/disk/by-uuid/1a1374a1-4bb9-4416-b21c-9350e57b70f1 /media/thomas/Tom\040WD\040HD auto nosuid,nodev,nofail,noauto,compress=lzo,space_cache,uhelper=udisk 0 0

I presume this is either due to both Gnome and Deja Dup attempting to mount the drive, or Deja Dup not waiting until the drive has been successfully mounted.

ProblemType: Bug
DistroRelease: Ubuntu 12.10
Package: deja-dup 24.0-0ubuntu1
ProcVersionSignature: Ubuntu 3.5.0-16.25-generic 3.5.4
Uname: Linux 3.5.0-16-generic x86_64
ApportVersion: 2.6.1-0ubuntu1
Architecture: amd64
Date: Fri Oct 5 11:45:05 2012
EcryptfsInUse: Yes
InstallationMedia: Ubuntu GNOME Remix 12.10 "Quantal Quetzal" - Alpha amd64(20120913)
SourcePackage: deja-dup
UpgradeStatus: No upgrade log present (probably fresh install)

[Launchpad Janitor (janitor)]

Status changed to 'Confirmed' because the bug affects multiple users.

[Matthias Niess (mniess)]

This bug appeared for me every since I upgraded to quantal.

[Matthias Niess (mniess)]

@Tom are you sure this is another bug and not the same as #617012?

[Tom Wright (twright-tdw)]

This bug stopped occurring for me a while ago.
On 6 Mar 2013 17:35, "Matthias Niess" <email address hidden> wrote:

> @Tom are you sure this is another bug and not the same as #617012?
>
> --
> You received this bug notification because you are subscribed to the bug
> report.
> https://bugs.launchpad.net/bugs/1062186
>
> Title:
> 'Backup Failed' message when external backup drive first inserted
>
> To manage notifications about this bug go to:
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> https://bugs.launchpad.net/ubuntu/+source/deja-dup/+bug/1062186/+subscriptions
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[TomasHnyk (sup)]

It still happens to me (just now) on 12.10 64bit. It has been happeninng ever since I upgraded to Quantal, if I recall correctly.

[TomasHnyk (sup)]

As for #617012, there is nothing about d-bus in the error message, see screenshot attached.

[Matthias Niess (mniess)]

This is the exact error I get. How can we get more detailed information to post here?

[Bèr Kessels (berkes) (ber)]

«I presume this is either due to both Gnome and Deja Dup attempting to mount the drive, or Deja Dup not waiting until the drive has been successfully mounted.»

Here is a trick that makes that suspicion even more probable:

1. Disconnect the drive.
2. Log out of your account, or lock the screen.
3. Connect the drive.
4. Log-in.

On my machine, in this case, Deja-Dup wins the race and mounts the Drive. Now Gnome complains that it cannot mount the drive becauase "it is already in use".

Seems like a "Race-condition" mostly.

[Matthias Niess (mniess)]

I added deja-dup to the bug-report so that this appears in *their* bugtracker and not the ubuntu-packages. I'm sure this is a race condition.

I get the error when I plug in my slow external HDD. Leaving it plugged in I trigger the backups again by pluggin in another USB device. As the backup-drive is already mounted there is no race-condition and the backup works.

[Markcortbass (markcortbass)]

It still happens to me on 13.10 64bit with an external HDD.

[Joe Mooring (jmooring)]

Thanks Matthias. Your suggestion to connect another USB device to trigger the backups works nicely. I'm experiencing this problem on 14.04 Beta 2.

[delki8 (delki8)]

Same problem on a recent dist-upgrade from Ubuntu 13.10 to 14.04.

[Matthias Niess (mniess)]

I can confirm this problem still exists on a fresh install (not upgraded) of 14.04 with a freshly set up backup.

[Bèr Kessels (berkes) (ber)]

I would like everyone ask who participated in this bug and is affected by this, to mark bug #617012 as "affects me too". This way it might get on the devlopers radar sooner.

[Olivier Febwin (febcrash)]

This problem still exists on 15.04

[Arthur Rodrigues (araruna)]

Still happens in 15.10...

Four years already...

[Or Schiro (orschiro)]

And in 16.04 as well.