I have a very similar experience on Ubuntu MATE 18.04.
/run/user/1000/keyring/ssh is opened by gnome-keyring-daemon
/run/user/1000/keyring/.ssh is opened by /usr/bin/ssh-agent
$SSH_AUTH_SOCK points to /run/user/1000/keyring/ssh
When I try to open an SSH session to another machine it hangs just after "SSH2_MSG_NEWKEYS received"
Changing $SSH_AUTH_SOCK to point to /run/user/1000/keyring/.ssh allows the SSH to complete
I have a very similar experience on Ubuntu MATE 18.04.
/run/user/ 1000/keyring/ ssh is opened by gnome-keyring- daemon 1000/keyring/ .ssh is opened by /usr/bin/ssh-agent 1000/keyring/ ssh
/run/user/
$SSH_AUTH_SOCK points to /run/user/
When I try to open an SSH session to another machine it hangs just after "SSH2_MSG_NEWKEYS received"
Changing $SSH_AUTH_SOCK to point to /run/user/ 1000/keyring/ .ssh allows the SSH to complete