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

[Qianqian Fang]

On 03/26/2018 03:53 PM, Mihai Moldovan wrote:
> Please make sure that nx-libs 3.5.99.16 is installed on the server side.
> This sounds like a typical incarnation of the DPMS bug, fixed with 
> nx-libs 3.5.99.15. 

thanks Mihai


I confirm that the server giving the first error, i.e. "The remote proxy 
closed the connection while negotiating..."
has indeed installed an older version of libnx-x11 (3.5.0.33~710).

after letting apt-get to upgrade the nx libraries and x2go packages,
I saw the libnx-x11 was replaced by a new package named libnx-x11-6, and
the version is now 3.5.99.16. However, now I start seeing the 2nd error
message on those machines, i.e. "connection failed".

> 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).

here is a dump of the session.log file under the failed session:


|NXAGENT - Version 3.5.99.16||
||
||Copyright (c) 2001, 2011 NoMachine (http://www.nomachine.com)||
||....||
||See https://github.com/ArcticaProject/nx-libs for more information.||
||
||Info: Agent running with pid '17844'.||
||Session: Starting session at 'Mon Mar 26 16:56:11 2018'.||
||Error: Aborting session with 'Unable to open display 
'nx/nx,options=/tmp/.x2go-fangq/C-fangq-50-1522097770_stDXFCE_dp24/options:50''.||
||Session: Aborting session at 'Mon Mar 26 16:56:11 2018'.||
||Session: Session aborted at 'Mon Mar 26 16:56:11 2018'.||
|


strangely, the x2go window reports something differently, it says (see 
attached screenshot)

|"PANIC!" Failure negotiating the session in stage 7||
||...||
||Wrong version or invalid session authentication cookie.||
||....||
|

are these two error messages caused by a single issue or multiple?

I've already restarted x2gosever, but no dice. any other files that I 
need to reset/clear?

thanks

Qianqian

>
>
>
> Mihai
>

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