I did try the nx-libs version you suggested in epel-testing. I also tried to use an earlier version of the virtual machine for which I knew that things were working. None of these fixed the problem.

I feel that it should be an issue with the client. I'm using Windows 10 and version 4.0.5.0 of X2Go Client. Could it have been some windows update that broke things? I have tried re-installing the client and completely wiping out everything (the .x2go folder as well as all the registry keys), but still xinerama support seems to have been lost.

Any other ideas?

On Thu, Dec 3, 2015 at 7:15 AM, Orion Poplawski <orion@cora.nwra.com> wrote:
On 12/02/2015 11:27 PM, Dimitri Loizos wrote:
Hi Orion and thanks for the reply.

The server is running CentOS 6.7 and the version of nx-libs is
3.5.0.32-2.el6. From what I saw it was released (at least for Fedora) 4
months ago. Is there a different version that I would better use?

 It was pushed to stable 2 months ago.  Please try https://bodhi.fedoraproject.org/updates/FEDORA-EPEL-2015-021c33c7b0 in epel-testing which hopefully should fix the issue.  If it does, please leave feedback on the update.


On Wed, Dec 2, 2015 at 9:21 PM, Orion Poplawski <orion@cora.nwra.com
<mailto:orion@cora.nwra.com>> wrote:

    On 12/02/2015 08:34 PM, Dimitri Loizos wrote:

        Hello,

        I have been using x2go for a couple of months now and have been very
        happy with it. My configuration is a server running a virtual
        machine (CentOS) on it and x2go server running on that virtual
        machine.
        I connect to it through the x2go client on Windows 10.

        One of the features that I love about x2go is its support for
        multiple
        displays on the client side through xinerama. I have 2 monitors
        and x2go
        treats the session as such. The session will open across both
        monitors
        and I can easily maximize windows on each of these monitors.

        Well, that was until the latest reboot of the server. Now, even
        though I
        have the xinerama option on, the x2go client treats my 2 monitors as
        one: even though the session opens across both monitors, when I
        maximize
        a window, it will be maximized across both monitors.

        I have tried to reset the client, the server, play with different
        options, but so far to no avail.

        Any ideas on how I could get the 2 monitor behavior back?


    What version of nx-libs and the OS on the server?  There have been
    issues with Xinerama support in the Fedora/EPEL nx-libs packages
    recently.  See https://bodhi.fedoraproject.org/updates/?packages=nx-libs

    --
    Orion Poplawski
    Technical Manager 303-415-9701 x222 <tel:303-415-9701%20x222>
    NWRA/CoRA Division                    FAX: 303-415-9702
    <tel:303-415-9702>
    3380 Mitchell Lane orion@cora.nwra.com <mailto:orion@cora.nwra.com>
    Boulder, CO 80301 http://www.cora.nwra.com




--
Orion Poplawski
Technical Manager                     303-415-9701 x222
NWRA/CoRA Division                    FAX: 303-415-9702
3380 Mitchell Lane                  orion@cora.nwra.com
Boulder, CO 80301              http://www.cora.nwra.com