<div dir="ltr"><div class="gmail_extra"><div class="gmail_quote"><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex"><span class="gmail-">> hostnamectl set-hostname <a href="http://fedora.local.home.ionic.de" rel="noreferrer" target="_blank">fedora.local.home.ionic.de</a><br>
><br>
> Then, I edited /etc/hosts and added:<br>
><br>
> 192.168.122.128 fedora <a href="http://fedora.local.home.ionic.de" rel="noreferrer" target="_blank">fedora.local.home.ionic.de</a><br>
><br>
> This leads to exactly the problem you described.<br>
><br>
><br>
> If I change "fedora" to resolve to 127.0.0.1 instead (with<br>
> <a href="http://fedora.local.home.ionic.de" rel="noreferrer" target="_blank">fedora.local.home.ionic.de</a> staying on 192.168.122.128), I can connect via X2Go<br>
> again.<br>
><br>
> Can you confirm this?<br></span></blockquote><div><br></div><div>Just making this one change to the /etc/hosts file didn't change anything. However when I used the hostnamectl command I was able to get the dialog box asking me to continue or terminate what had to be 15 sessions. After terminating them all I got the X2Go screen for about 3 seconds and then it quit with the following segfault:</div><div><div><br></div><div>Nov 10 13:58:11 sobolev /usr/bin/x2goruncommand[2728]: dbus wrapper available as /usr/bin/dbus-run-session</div><div>Nov 10 13:58:12 sobolev kernel: glxinfo[2769]: segfault at 0 ip 00007f31b6cc4627 sp 00007fffb61bc838 error 4 in libX11-xcb.so.1.0.0[7f31b6cc4000+1000]</div><div>Nov 10 13:58:12 sobolev systemd[1]: Started Process Core Dump (PID 2773/UID 0).</div><div>Nov 10 13:58:12 sobolev systemd-coredump[2774]: Process 2769 (glxinfo) of user 1000 dumped core.#012#012Stack trace of thread 2769:#012#0 0x00007f31b6cc4627 XGetXCBConnection (libX11-xcb.so.1)#012#1 0x00007f31b838eb46 __glXInitialize (libGLX_indirect.so.0)#012#2 0x00007f31b838a4a4 GetGLXPrivScreenConfig (libGLX_indirect.so.0)#012#3 0x00007f31b838b375 glXChooseVisual (libGLX_indirect.so.0)#012#4 0x000055f5cc3c2b6a main (glxinfo)#012#5 0x00007f31ba57b88a __libc_start_main (libc.so.6)#012#6 0x000055f5cc3c32fa _start (glxinfo)</div><div>Nov 10 13:58:13 sobolev abrt-server[2836]: Deleting problem directory ccpp-2017-11-10-13:58:12.853273-2769 (dup of ccpp-2017-11-10-13:54:22.364670-28375)</div><div>Nov 10 13:58:13 sobolev abrt-notification[2946]: Process 28375 (glxinfo) crashed in XGetXCBConnection()</div><div>Nov 10 13:58:13 sobolev kernel: mate-session[2731]: segfault at 0 ip 00007f3ffb453627 sp 00007ffeda962b68 error 4 in libX11-xcb.so.1.0.0[7f3ffb453000+1000]</div><div>Nov 10 13:58:13 sobolev systemd[1]: Started Process Core Dump (PID 2975/UID 0).</div><div>Nov 10 13:58:14 sobolev systemd-coredump[2976]: Process 2731 (mate-session) of user 1000 dumped core.#012#012Stack trace of thread 2731:#012#0 0x00007f3ffb453627 XGetXCBConnection (libX11-xcb.so.1)#012#1 0x00007f3ffc2b9b46 __glXInitialize (libGLX_indirect.so.0)#012#2 0x00007f3ffc2b54a4 GetGLXPrivScreenConfig (libGLX_indirect.so.0)#012#3 0x00007f3ffc2b5d11 glXQueryServerString (libGLX_indirect.so.0)#012#4 0x00007f40098b8939 epoxy_glx_version (libepoxy.so.0)#012#5 0x00007f400cbeb869 gdk_x11_screen_init_gl (libgdk-3.so.0)#012#6 0x00007f400cbebc3a _gdk_x11_screen_update_visuals_for_gl (libgdk-3.so.0)#012#7 0x00007f400cbf4965 _gdk_x11_screen_init_visuals (libgdk-3.so.0)#012#8 0x00007f400cbf1990 _gdk_x11_screen_new (libgdk-3.so.0)#012#9 0x00007f400cbe154d _gdk_x11_display_open (libgdk-3.so.0)#012#10 0x00007f400cbb5c13 gdk_display_manager_open_display (libgdk-3.so.0)#012#11 0x00007f400d0a4f50 gtk_init_with_args (libgtk-3.so.0)#012#12 0x000055e55977eace main (mate-session)#012#13 0x00007f400ac7588a __libc_start_main (libc.so.6)#012#14 0x000055e55977f66a _start (mate-session)</div><div>Nov 10 13:58:14 sobolev /usr/bin/x2gofeature[2987]: x2gofeature called with options: X2GO_RUN_EXTENSIONS</div><div>Nov 10 13:58:14 sobolev /usr/share/x2go/x2gofeature.d/x2goserver-extensions.features[2993]: x2goserver-extensions.features called with options: X2GO_RUN_EXTENSIONS</div><div>Nov 10 13:58:14 sobolev /usr/bin/x2goserver-run-extensions[3000]: x2goserver-run-extensions called with options: localguy-51-1510340283_stDMATE_dp32 post-runcommand</div><div>Nov 10 13:58:14 sobolev /usr/bin/x2gofeature[3021]: x2gofeature called with options: X2GO_DESKTOPSHARING</div><div>Nov 10 13:58:14 sobolev /usr/share/x2go/x2gofeature.d/x2goserver-extensions.features[3041]: x2goserver-extensions.features called with options: X2GO_DESKTOPSHARING</div><div>Nov 10 13:58:14 sobolev /usr/share/x2go/x2gofeature.d/x2goserver.features[3047]: x2goserver.features called with options: X2GO_DESKTOPSHARING</div><div>Nov 10 13:58:15 sobolev abrt-server[2995]: Deleting problem directory ccpp-2017-11-10-13:58:14.112723-2731 (dup of ccpp-2017-11-10-13:54:24.515378-28338)</div><div>Nov 10 13:58:15 sobolev /usr/share/x2go/x2gofeature.d/x2goserver-xsession.features[3054]: x2goserver-xsession.features called with options: X2GO_DESKTOPSHARING</div></div><div><br></div><div><br></div><div><br></div><div> Weirdly, this seems not to happen if the hostname is *not* set to a FQDN. I have</div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex">
a machine that is working flawlessly with such a setup:<br>
<br>
hostname: shortname<br>
/etc/hosts: shortname or FQDN not set<br>
dns: returning public IPv4 and IPv6 addresses for FQDN; shortname will be<br>
extended to FQDN automatically (and hence also resolves to these public addresses)<br>
<br>
In this scenario, connecting via X2Go works just fine, even though neither<br>
address is 127.0.0.1.<br></blockquote><div><br></div><div>Just to confirm the /etc/hosts file now looks like this:</div><div><div>127.0.0.1 localhost localhost.localdomain localhost4 localhost4.localdomain4</div><div>::1 localhost localhost.localdomain localhost6 localhost6.localdomain6</div><div><br></div><div>#150.108.64.57 <a href="http://sobolev.dsm.fordham.edu">sobolev.dsm.fordham.edu</a> sobolev</div><div>150.108.64.57 <a href="http://sobolev.dsm.fordham.edu">sobolev.dsm.fordham.edu</a> 127.0.0.1</div><div>150.108.64.65 <a href="http://mandelbrot.dsm.fordham.edu">mandelbrot.dsm.fordham.edu</a> mandelbrot</div><div>150.108.64.52 <a href="http://dsm.dsm.fordham.edu">dsm.dsm.fordham.edu</a> dsm</div></div><div><br></div><div><br></div><div><br></div><div> </div></div></div></div>