Hello, 

I am working on establishing a connection between an Ubuntu client and Centos server with x2go server on it for a connection with signed certificates. (My x2go server currently uses asymmetric encryption and works as intended but requires manual placement of keys between clients and hosts, which is tedious). So I setup a CA and configured signed certificates to work with ssh-agent because I see x2go supports ssh-agent. 

When I used ssh agent to take in the private key and signed certificate (see commands below), I can ssh to the x2go server using the certificate and private key via command line, but I can't seem to get x2go application to open a display when ticking the (use ssh agent box). I tried to specify the private key or certificate in the "Use RSA/DSA key for ssh connection box" and private key and certificate together and authentication to the server via x2go was not even attempted as the (secure log was empty). Signed certificates are a common and very secure method of authentication, and x2go needs to support this does it already support it and there is something major I might have missed? 

(To authenticate to x2go server via terminal)

with ssh agent I do:

ssh username@ip_address

without ssh agent I do:

ssh -i ~/.ssh/id_rsa-cert.pub -i ~/.ssh/id_rsa username@ip_address