[X2Go-User] x2go stops working on some Ubuntu 14.04 boxes

[Qianqian Fang]

Dear list,

I run a small cluster for my lab, including about 12 Linux boxes running 
Ubuntu 14.04 (1x with 16.04). We have been using x2go and ssh as the 
primary tool to access these computing resources.

Recently (started a month ago), I noticed there were package updates of 
x2go server (now 4.1.0.0-0-1517), client (now 4.1.1.1-0-1719) and the 
nx11 libraries, on the other hand, I started having difficulty log on to 
some of my servers, and this list starts to grow. I am not sure if this 
was the result of the recent package upgrade, or the reason motivated 
the package updates, but I started seeing the below two types of messages:

For some of the machines, I saw the below message initially:

*The remote proxy closed the connection while negotiating*

**

*the session. This may be due to the wrong authentication*

**

*credentials passed to the server.*

for some other servers, I am getting the below message:

*Connection failed.**Failed to start X2Go Agent session with ID 
account-xxxxxx_stDXFCE_dp24. X2Go Agent terminated unexpectedly. 
Aborting session startup. *

The 1st message appeared first, after I tried to restart x2goserver or 
rebooting

the machine, or apply the updates, deleting the ~/.x2go folder, or a 
reboot, those

machines typically display the 2nd message; none of those were fixed 
using the

above procedures.

right now, I have about 2/3 of the my servers are not accessible via x2go.

I would like to know if there is a workaround. thanks

Qianqian

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