Comment 6 for bug 1812247

Hi,
I tried the same on Bionic/Cosmic/Disco (a VM each running the same commands)
1. created an ssh key (ssh-keygen)
2. added it to authorized key (cat ~/.ssh/id_rsa.pub >> ~/.ssh/authorized_keys)
3. added it with ssh-add (ssh-add)
4. verified it was added (ssh-add -l)
5. logged to local IP via ssh using the key (ssh ubuntu@127.0.0.1 uname -a)
   (working)
6. removed the key (ssh-add -d)
7. added the key in confirm mode (ssh-add -c)
8. logged to local IP via ssh using the key (ssh ubuntu@127.0.0.1 uname -a)
   Got the confirmation prompt

I only got the "sign_and_send_pubkey: signing failed: agent refused operation" if in the prompt that asked me if I should use the key I hit "cancel".
That seems reasonable thou.

Is the following sequence failing for you?
If so would you report the full output for that sequence of commands that you get?
Note: I used a clean VM with ssh -XY to allow the popup to come through to my host.
sudo apt-get install ssh-askpass-gnome
eval `ssh-agent -s`
ssh-keygen
cat ~/.ssh/id_rsa.pub >> ~/.ssh/authorized_keys
ssh-add
ssh-add -l
ssh ubuntu@127.0.0.1 uname -a
ssh-add -d
ssh-add -c
ssh-add -l
ssh ubuntu@127.0.0.1 uname -a
  # pupup should appear