*** This bug is a duplicate of bug 918489 ***
https://bugs.launchpad.net/bugs/918489
After some testing, I think I know what could cause this (now very old)
bug. There was a bug in deja-dup/duplicity that allowed for an
accidental change in password when making the occasional full backup
checkpoint (bug 918489, fixed in deja-dup 34.3).
Here's how this would be reproduced, using deja-dup <= 34.2:
- Create a new backup with password 'a'
- Keep backing up until deja-dup decides to make a new backup. Then either
have a different password saved in gnome-keyring or enter a different password
when it prompts. Say, 'b'
- Now you have two backup chains with different passwords, but deja-dup will
keep adding new backups.
- Until either your cache gets blown away or deja-dup decides to do its
every-two-months backup-validation check. (Or heaven forbid, your hard drive
gets blown away and you need to restore.)
- When either happens, duplicity will try to download the encrypted manifest
files for all the backups and deja-dup will prompt you for the decryption
password.
- If you enter 'a', it will choke on your second backup and show the password
prompt again. If you enter 'b' it will choke on the first. Thus you get
eternal backup prompts.
The only way to recover is to blow away older backups (or the whole
thing) and start over. If you were trying to restore, your files can be
manually recovered using duplicity though.
Anyway. That's my research into what this bug was likely about. I'll
mark it as a dup of bug 918489.
** This bug has been marked a duplicate of bug 918489
duplicity allows bad passphrase on full backup if archive cache exists
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https://bugs.launchpad.net/bugs/1219187
Title:
deja-dup cannot decrypt my backup any more, GPG reports "bad session
key"
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