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

[Mihai Moldovan]

* 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

-------------- next part --------------
A non-text attachment was scrubbed...
Name: signature.asc
Type: application/pgp-signature
Size: 898 bytes
Desc: OpenPGP digital signature
URL: <http://lists.x2go.org/pipermail/x2go-dev/attachments/20180315/8c7a2a02/attachment.sig>