/usr/lib/gnome-keyring/gnome-keyring-ask is the program prompting with
the dialogue box, from package gnome-keyring 2.22.2-0ubuntu1.
** Summary changed:
- seahorse asks for passphrase for plain `ssh-add -l'
+ gnome-keyring asks for passphrase for plain `ssh-add -l'
--
gnome-keyring asks for
The above was originally
https://answers.launchpad.net/ubuntu/+source/openssh/+question/36438
rather than a bug. However, on thinking about it, prompting for the
passphrase for `ssh-add -l' seems broken compared to the old behaviour.
--
seahorse asks for passphrase for plain `ssh-add -l'