Deja Dup`s "Back Up Now" button is not highlighted
Shorter version
Ctrl+Alt+t to open a terminal
pkill deja-dup
Re-run the "Backups" program and try again.
In my case, there was no backup running but deja-dup had a couple of things running.
I did a ps -eaf | grep dup
and killed the pids. Then I started DejaDup from the menu and the button was active.
That button is grayed out when a backup (or restore) is already in progress. Maybe one was running in the background?
Is the button enabled now?
ps aux | grep deja
kill <pid of "deja-dup --backup --auto">
Immediately the backup button becomes active.
This should be reported as a bug as the frontend should either have a button to terminate running backups or automatically reconcile concurrent backups.
My 'back up now' button was disabled. In my case the problem was that when I opened the Deja Dup config, the 'storage' option was set to 'Ubuntu One', and it opened another window for logging into that.
I changed the storage setting to a local drive, but it took me a while to realise I had to cancel the Ubuntu One login before Deja Dup would allow me to run a backup.