[X2Go-Dev] x2go wiki : self-debugging instructions ?

[Manfred Amoureux]

Ok.

Now that you have attracted my attention this git request ( *nxagent
crashes when moving the session window into another screen* ), it actually
looked more like a client-side issue,
so I tested again from another computer (with Windows 7 and a single
screen) and while at the first attempt the connection failed with a message
that let me think it was because there was an open connection on the server
with this user, after a reboot from the server machine, the connection now
works from this computer.

So I guess it really is a client problem now.
I am first going to to try uninstalling and reinstalling x2go client from
my computer.


Manfred Amoureux
Tel: (+33)6.800.343.16

2018-03-15 15:16 GMT+01:00 Mihai Moldovan <ionic at ionic.de>:

> * On 03/15/2018 03:07 PM, Manfred Amoureux wrote:
> > I recorded a screen capture while trying to start a connection from
> another
> > computer. See the link below.
> > As you can see, it seems the connection gets opened but the window
> crashes
> > immediately. I have tried from several computers (including one with
> Windows) so
> > I don't think it's a problem on the client side.
>
> Classic pattern of https://github.com/ArcticaProject/nx-libs/issues/677
>
> Will be fixed with the next nx-libs release, but I cannot tell when that
> will
> be. Ideally I'd like to see more xinerama changes/fixes to make it
> worthwhile.
>
>
> > I have attached an extract of the /var/log/syslog file these last
> minutes. I see
> > nothing that looks like an error to me. Obviously, you should be able to
> > interpret it better than me.
> > I have also restarted x2go (/sudo systemctl stop x2goserver.service/ and
> then
> > /sudo systemctl start x2goserver.service/ ) after changing the
> > /etc/x2go/x2goserver.conf file with logging to /debug/. That is the
> second text
> > file attached.
> >
> > In it, I can see :
> > Mar 15 14:51:15 ServeurITeN /usr/bin/x2gostartagent: successfully
> started X2Go
> > Agent session with ID manfred-50-1521121872_stDXFCE_dp24
> > Which means, I guess, the session was properly started.
>
> Well, that message is an euphemism. We launched the binary, but everything
> that
> happens after that is unknown since we immediately put the process into
> background. But yeah, having it spawned nxagent is good.
>
>
> > However, further on, I can also see :
> > Mar 15 14:51:22 ServeurITeN x2gogetstatus: db_getstatus called, session
> ID:
> > manfred-50-1521121872_stDXFCE_dp24, return value:
> > Mar 15 14:51:22 ServeurITeN x2gocleansessions:
> > manfred-50-1521121872_stDXFCE_dp24: removed from database, not updating
> status.
> > Mar 15 14:51:22 ServeurITeN x2gocleansessions:
> > manfred-50-1521121872_stDXFCE_dp24: in failed state, but agent is gone,
> forgetting.
> > Is that some kind of failure ?
>
> That indicates that x2goagent/nxagent died after starting up.
>
>
> > It is also interesting to see that when I issue a /who/ command with the
> Linux
> > Terminal , there is one extra session under my login.
>
> Yup, X2Go uses SSH connections for everything.
>
>
> > So I tried opening a x2go session with another login, which also failed
> but with
> > a different error message : "/Failed to start X2Go Agent session with ID
> > formation-50-1521122343_stDXFCE_dp24. X2Go Agent terminated
> unexpectedly.
> > Aborting session startup./" I then restarted the x2goserver.service
> again and
> > tried again with the other user account and got the same error as for
> the first
> > user ("The connection with the remote server was shut down. Please check
> the
> > state of your network connection.").
>
> The first error message is weird, but explainable by the fact that the
> proxy was
> not quick enough to connect in the first place (or something like this).
>
> Right now, you have two options: wait for a new nx-libs release (as said,
> unspecified time) or switch to the nightly/heuler repository that contains
> a fix
> for this issue... and switch back to the stable version once the new
> version has
> been properly released.
>
>
>
> Mihai
>
>
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