* On 03/26/2018 03:45 PM, Qianqian Fang wrote: > 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:
Please make sure that nx-libs 3.5.99.16 is installed on the server side. > 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.* This sounds like a typical incarnation of the DPMS bug, fixed with nx-libs 3.5.99.15. > 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. However, this doesn't sound like it. Normally the DPMS bug only manifests after a pretty long time (say, an hour or 1.5h, depending on DPMS settings), but not right away after starting the session. I haven't yet seen such an error message yet. It's possible that it's caused by the session repositioning on non-first displays/nxagent crashing bug as fixed with nx-libs 3.5.99.16, but normally that incarnates differently (i.e., nxagent is being started successfully, but then dies quickly while starting the session without a client-side error message). Mihai
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