Might try re-installing libc on the off chance it was corrupted.

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On Tue, 25 Oct 2016, Thackeray, Neil L wrote:

Date: Tue, 25 Oct 2016 21:01:37 +0000
From: "Thackeray, Neil L" <[email protected]>
To: "[email protected]" <[email protected]>
Subject: Re: [X2Go-User] Segfault on some applications

This is a list of packages that were upgraded. I wonder if there was a change 
in libc that is causing the problem?

accountsservice apparmor bamfdaemon compiz compiz-core compiz-gnome 
compiz-plugins-default cups-browsed
 cups-filters cups-filters-core-drivers distro-info-data fuse fwupd 
gir1.2-dbusmenu-glib-0.4
 gnome-calculator gnome-calendar gnome-font-viewer gnome-software 
gnome-software-common gnome-sudoku
 gnome-system-monitor grub-common grub-pc grub-pc-bin grub2-common 
gtk2-engines-murrine ifupdown init
 init-system-helpers initramfs-tools initramfs-tools-bin initramfs-tools-core 
isc-dhcp-client
 isc-dhcp-common kbd klibc-utils language-selector-common 
language-selector-gnome less libaccountsservice0
 libapparmor-perl libapparmor1 libappstream-glib8 libbamf3-2 libc-bin 
libc-dev-bin libc6 libc6-dbg libc6-dev
 libcompizconfig0 libcupsfilters1 libdbusmenu-glib4 libdbusmenu-gtk3-4 
libdbusmenu-gtk4 libdecoration0
 libdfu1 libdrm-amdgpu1 libdrm-intel1 libdrm-nouveau2 libdrm-radeon1 libdrm2 
libegl1-mesa libfontembed1
 libframe6 libfuse2 libfwupd1 libgbm1 libgl1-mesa-dri libgl1-mesa-glx 
libglapi-mesa libgweather-3-6
 libgweather-common libklibc liblightdm-gobject-1-0 libllvm3.8 libmysqlclient20 
libnautilus-extension1a
 libnm-glib-vpn1 libnm-glib4 libnm-gtk-common libnm-gtk0 libnm-util2 libnm0 
libnma-common libnma0
 libp11-kit0 libpam-systemd libpoppler-glib8 libpoppler58 libpython3.5 
libpython3.5-minimal
 libpython3.5-stdlib libsystemd0 libudev1 libunity-core-6.0-9 
libwayland-egl1-mesa libxatracker2
 light-themes lightdm linux-firmware locales mtools multiarch-support 
mysql-client-core-5.7 mysql-common
 mysql-server-core-5.7 nautilus nautilus-data network-manager 
network-manager-gnome p11-kit p11-kit-modules
 poppler-utils python3-distupgrade python3-update-manager python3.5 
python3.5-minimal snapd sudo
 suru-icon-theme systemd systemd-sysv ubuntu-artwork ubuntu-core-launcher 
ubuntu-drivers-common
 ubuntu-mobile-icons ubuntu-mono ubuntu-release-upgrader-core 
ubuntu-release-upgrader-gtk ubuntu-software
 udev unity unity-schemas unity-services update-manager update-manager-core 
vino xdiagnose xserver-xorg-core
 xserver-xorg-video-intel

-----Original Message-----
From: Thackeray, Neil L
Sent: Tuesday, October 25, 2016 3:37 PM
To: [email protected]
Subject: RE: [X2Go-User] Segfault on some applications

I wasn't specific enough, it is 16.04.1. I've installed on a test computer as 
well and the problem replicates. This problem didn't happen until I did an 
apt-get dist-upgrade today.

Distributor ID: Ubuntu
Description:    Ubuntu 16.04.1 LTS
Release:        16.04
Codename:       xenial

-----Original Message-----
From: Robert Dinse [mailto:[email protected]]
Sent: Tuesday, October 25, 2016 2:27 PM
To: Thackeray, Neil L <[email protected]>
Cc: [email protected]
Subject: Re: [X2Go-User] Segfault on some applications


     I am using 16.04.1 LTS and do not have this problem.  If you are just on 
16.04 and not 16.04.1, I would suggest upgrading.  I had a lot of problems with 
16.04 as well.  I think it was released a little ahead of being ready for 
primetime.

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 Eskimo North Linux Friendly Internet Access, Shell Accounts, and Hosting.
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 See our web site: http://www.eskimo.com/ (206) 812-0051 or (800) 246-6874.

On Tue, 25 Oct 2016, Thackeray, Neil L wrote:

Date: Tue, 25 Oct 2016 19:03:26 +0000
From: "Thackeray, Neil L" <[email protected]>
To: "[email protected]" <[email protected]>
Subject: [X2Go-User] Segfault on some applications

I just upgraded Ubuntu from 14 to 16.04, and I really regret it now. Many 
things now don't work within X2go. I've completely lost KDE, which I see is a 
known issue, but for some reason now Firefox and many other applications don't 
work. I even tried gnome-calculator and it doesn't work now, but LibreOffice 
does. I'm not sure if it's because of the graphical toolset used or not. The 
most important app not working for us is Eclipse. All of the applications that 
don't work function fine with an exported X session, but there is just 
something in X2go that is keeping it from working.

kernel: [12762.555968] firefox[65546]: segfault at 0 ip
00007f9d91f649bf sp 00007ffecd72a238 error 4 in
libc-2.23.so[7f9d91ecf000+1bf000]
kernel: [12762.572675] crashreporter[65553]: segfault at 0 ip
00007f4bf9c009bf sp 00007ffe73a9d248 error 4 in
libc-2.23.so[7f4bf9b6b000+1bf000]

kernel: [12787.466816] [UFW BLOCK] IN=eth0 OUT=
MAC=01:00:5e:00:00:01:00:25:00:ef:46:fb:08:00 SRC=128.174.227.254
DST=224.0.0.1 LEN=44 TOS=0x00 PREC=0x00 TTL=1 ID=63656 PROTO=UDP
SPT=52742 DPT=8612 LEN=24
kernel: [12800.095585] gnome-calculato[65714]: segfault at 0 ip
00007fcfab8999bf sp 00007ffd744e1ff8 error 4 in
libc-2.23.so[7fcfab804000+1bf000]

kernel: [13492.855643] eclipse[68620]: segfault at 0 ip
00007f4bca47c9bf sp 00007ffd8d26b2b8 error 4 in 
libc-2.23.so[7f4bca3e7000+1bf000]

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