On Nov 15, 2017, at 4:11 PM, Mihai Moldovan <ionic@ionic.de> wrote:

* On 11/15/2017 10:05 PM, Robert Kudyba wrote:
I’m taking another shot with providing logs as there appears to be more than
last time. Here are debug logs from the client and then server. I take it the
core dumps from MATE, GLXINFO or XFCE won’t help?

Seems to crash in a similar place, from the gdb of the MATE core dump:
Program terminated with signal SIGSEGV, Segmentation fault.
#0  0x00007f95cdc26627 in XGetXCBConnection (dpy=dpy@entry=0x5570c096b000) at
x11_xcb.c:9
9return dpy->xcb->connection;

It's really the same information, your applications crash because they can't
establish a connection via XCB.

This lead me to something else, though.

Server-side: rpm -qa '*x2goagent*' please.

rpm -qa '*x2goagent*'
x2goagent-3.5.0.34-0.0x2go1.0.git20171111.778.heuler.fc26.x86_64