[X2Go-User] Newbie probem: Remote desktop terminated soon after pop up

[Eric Tang]

1. x2goclient ran on Ubuntu 14.04, login user=eric.

2. x2goserver ran on AWS EC2 Ubuntu 14.04, login user=mooc.

A black X2GO remote desktop after x2goclient tried to log in. But it was
terminated a few seconds later.

Debug log of x2goserver as follows:
Nov 19 02:23:56 moocvm /usr/bin/x2golistsessions[2503]: x2golistsessions
has been called with no option Nov 19 02:24:04 moocvm anacron[848]: Job
`cron.daily' started Nov 19 02:24:04 moocvm anacron[2553]: Updated
timestamp for job `cron.daily' to 2015-11-19 Nov 19 02:24:04 moocvm
/usr/bin/x2gostartagent: x2gostartagent called with options: 1024x768 adsl
16m-jpeg-9 unix-kde-depth_24 us pc105/us 1 D XFCE Nov 19 02:24:04 moocvm
/usr/bin/x2gostartagent: client announced itself as ,,203.160.68.46'' Nov
19 02:24:04 moocvm /usr/bin/x2gosessionlimit[2587]: x2gosessionlimit has
been called Nov 19 02:24:05 moocvm /usr/bin/x2golistsessions[2590]:
x2golistsessions has been called with options: --all-servers Nov 19
02:24:05 moocvm /usr/lib/x2go/x2gogetdisplays[2607]: db_getdisplays called,
server: moocvm; return value: Nov 19 02:24:05 moocvm
/usr/lib/x2go/x2gogetports[2616]: db_getports called, server: moocvm;
return value: Nov 19 02:24:05 moocvm /usr/lib/x2go/x2goinsertsession[2646]:
db_insertsession called, session ID: mooc-50-1447921445_stDXFCE_dp24,
server: moocvm, session ID: mooc-50-1447921445_stDXFCE_dp24 Nov 19 02:24:05
moocvm /usr/lib/x2go/x2gogetports[2655]: db_getports called, server:
moocvm; return value: Nov 19 02:24:06 moocvm
/usr/lib/x2go/x2goinsertport[2669]: db_insertport called, session ID:
mooc-50-1447921445_stDXFCE_dp24, server: moocvm, SSH port: 30001 Nov 19
02:24:06 moocvm /usr/sbin/x2gocleansessions[2157]:
mooc-50-1447921445_stDXFCE_dp24: state file for this session does not
exist: /tmp/.x2go-mooc/C-mooc-50-1447921445_stDXFCE_dp24/state (this can be
ignored during session startups) Nov 19 02:24:06 moocvm
/usr/lib/x2go/x2gogetports[2707]: db_getports called, server: moocvm;
return value: |30001| Nov 19 02:24:06 moocvm
/usr/lib/x2go/x2goinsertport[2721]: db_insertport called, session ID:
mooc-50-1447921445_stDXFCE_dp24, server: moocvm, SSH port: 30002 Nov 19
02:24:06 moocvm /usr/lib/x2go/x2gogetports[2730]: db_getports called,
server: moocvm; return value: |30001| |30002| Nov 19 02:24:06 moocvm
/usr/lib/x2go/x2goinsertport[2744]: db_insertport called, session ID:
mooc-50-1447921445_stDXFCE_dp24, server: moocvm, SSH port: 30003 Nov 19
02:24:06 moocvm /usr/bin/x2gofeature: x2gofeature called with options:
X2GO_RUN_EXTENSIONS Nov 19 02:24:06 moocvm
/usr/share/x2go/x2gofeature.d/x2goserver-extensions.features:
x2goserver-extensions.features called with options: X2GO_RUN_EXTENSIONS Nov
19 02:24:06 moocvm /usr/bin/x2goserver-run-extensions:
x2goserver-run-extensions called with options:
mooc-50-1447921445_stDXFCE_dp24 pre-start Nov 19 02:24:06 moocvm
/usr/bin/x2gostartagent: successfully started X2Go agent session with ID
mooc-50-1447921445_stDXFCE_dp24 Nov 19 02:24:06 moocvm
/usr/bin/x2gofeature: x2gofeature called with options: X2GO_RUN_EXTENSIONS
Nov 19 02:24:06 moocvm
/usr/share/x2go/x2gofeature.d/x2goserver-extensions.features:
x2goserver-extensions.features called with options: X2GO_RUN_EXTENSIONS Nov
19 02:24:06 moocvm /usr/bin/x2goserver-run-extensions:
x2goserver-run-extensions called with options:
mooc-50-1447921445_stDXFCE_dp24 post-start Nov 19 02:24:06 moocvm
/usr/lib/x2go/x2gocreatesession[2821]: db_createsession called, session ID:
mooc-50-1447921445_stDXFCE_dp24, cookie: 6b7ee6c3f3c2bb7a9209f4fc00b9aa7c,
client: 203.160.68.46, pid: 2788, graphics port: 30001, sound port: 30002,
file sharing port: 30003 Nov 19 02:24:06 moocvm /usr/bin/x2gostartagent:
blocking creation of agent's keyboard file
/tmp/.x2go-mooc/C-mooc-50-1447921445_stDXFCE_dp24/keyboard as requested by
session startup command Nov 19 02:24:11 moocvm /usr/bin/x2goruncommand:
x2goruncommand called with options: 50 2788 mooc-50-1447921445_stDXFCE_dp24
30002 xfce4-session nosnd D Nov 19 02:24:11 moocvm /usr/bin/x2goruncommand:
exporting LD_LIBRARY_PATH=/usr/lib/nx/X11/Xinerama:/usr/lib/nx/X11 Nov 19
02:24:11 moocvm /usr/bin/x2gofeature: x2gofeature called with options:
X2GO_RUN_EXTENSIONS Nov 19 02:24:11 moocvm
/usr/share/x2go/x2gofeature.d/x2goserver-extensions.features:
x2goserver-extensions.features called with options: X2GO_RUN_EXTENSIONS Nov
19 02:24:11 moocvm /usr/bin/x2goserver-run-extensions:
x2goserver-run-extensions called with options:
mooc-50-1447921445_stDXFCE_dp24 pre-runcommand Nov 19 02:24:11 moocvm
/usr/bin/x2goruncommand: running command /usr/bin/xfce4-session Nov 19
02:24:11 moocvm /usr/bin/x2gofeature: x2gofeature called with options:
X2GO_XSESSION Nov 19 02:24:11 moocvm /usr/bin/x2gosetkeyboard:
x2gosetkeyboard called with options: Nov 19 02:24:11 moocvm
/usr/bin/x2gosetkeyboard:
/home/mooc/.x2go/C-mooc-50-1447921445_stDXFCE_dp24/keyboard is blocked, not
setting keyboard parameters from client-side settings Nov 19 02:24:11
moocvm /usr/share/x2go/x2gofeature.d/x2goserver-extensions.features:
x2goserver-extensions.features called with options: X2GO_XSESSION Nov 19
02:24:11 moocvm /usr/share/x2go/x2gofeature.d/x2goserver.features:
x2goserver.features called with options: X2GO_XSESSION Nov 19 02:24:11
moocvm /usr/share/x2go/x2gofeature.d/x2goserver-xsession.features:
x2goserver-xsession.features called with options: X2GO_XSESSION Nov 19
02:24:11 moocvm /usr/bin/x2goruncommand: launching session with
Xsession-x2go mechanism, using STARTUP="xfce4-session" Nov 19 02:24:11
moocvm /etc/x2go/Xsession: executing /etc/x2go/Xsession.d/00upstart Nov 19
02:24:11 moocvm /etc/x2go/Xsession: executing
/etc/x2go/Xsession.d/20x11-common_process-args Nov 19 02:24:11 moocvm
/etc/x2go/Xsession: executing /etc/x2go/Xsession.d/30x11-common_xresources
Nov 19 02:24:19 moocvm /usr/bin/x2gomountdirs[3050]: x2gomountdirs has been
called with options: dir mooc-50-1447921445_stDXFCE_dp24 eric
/home/mooc/.x2go/ssh/key.MT3351
/home/eric/.x2go/S-mooc-50-1447921445_stDXFCE_dp24/
spool__PRINT_SPOOL___REVERSESSH_PORT__30003
Nov 19 02:24:19 moocvm /usr/bin/x2gomountdirs[3050]: mounting
/tmp/.x2go-mooc/spool/C-mooc-50-1447921445_stDXFCE_dp24, mount point type
is print spool directory Nov 19 02:24:19 moocvm
/usr/bin/x2gomountdirs[3050]: db_insertmount called, session ID:
mooc-50-1447921445_stDXFCE_dp24, path:
/tmp/.x2go-mooc/spool/C-mooc-50-1447921445_stDXFCE_dp24, client: 127.0.0.1;
return value: 1 Nov 19 02:24:19 moocvm /usr/bin/x2gomountdirs[3050]: SSH
key file has arrived: /home/mooc/.x2go/ssh/key.MT3351 Nov 19 02:24:19
moocvm /usr/bin/x2gomountdirs[3050]: SSH host key has arrived:
/home/mooc/.x2go/ssh/key.MT3351.ident Nov 19 02:24:19 moocvm
/usr/bin/x2gomountdirs[3050]: executing: timeout 30 sshfs  -o
idmap=user,uid=`id -u`,gid=`id
-g`,default_permissions,ServerAliveInterval=300,Cipher=blowfish,
IdentityFile=/home/mooc/.x2go/ssh/key.MT3351,UserKnownHostsFile=
/home/mooc/.x2go/ssh/key.MT3351.ident
"eric"@127.0.0.1:"/home/eric/.x2go/S-mooc-50-1447921445_stDXFCE_dp24/spool"
"/tmp/.x2go-mooc/spool/C-mooc-50-1447921445_stDXFCE_dp24" -p 30003 Nov 19
02:24:28 moocvm /etc/x2go/Xsession: executing
/etc/x2go/Xsession.d/35x11-common_xhost-local Nov 19 02:24:28 moocvm
/etc/x2go/Xsession: executing /etc/x2go/Xsession.d/40x11-common_xsessionrc
Nov 19 02:24:28 moocvm /etc/x2go/Xsession: executing
/etc/x2go/Xsession.d/50x11-common_determine-startup Nov 19 02:24:28 moocvm
/etc/x2go/Xsession: executing /etc/x2go/Xsession.d/55xfce4-session Nov 19
02:24:28 moocvm /etc/x2go/Xsession: executing
/etc/x2go/Xsession.d/60x11-common_localhost Nov 19 02:24:28 moocvm
/etc/x2go/Xsession: executing /etc/x2go/Xsession.d/60x11-common_xdg_path
Nov 19 02:24:28 moocvm /etc/x2go/Xsession: executing
/etc/x2go/Xsession.d/60xdg-user-dirs-update Nov 19 02:24:28 moocvm
/etc/x2go/Xsession: executing /etc/x2go/Xsession.d/70gconfd_path-on-session
Nov 19 02:24:29 moocvm /etc/x2go/Xsession: executing
/etc/x2go/Xsession.d/70im-config_launch Nov 19 02:24:29 moocvm
/etc/x2go/Xsession: executing /etc/x2go/Xsession.d/75dbus_dbus-launch Nov
19 02:24:29 moocvm /etc/x2go/Xsession: executing
/etc/x2go/Xsession.d/90qt-a11y Nov 19 02:24:29 moocvm /etc/x2go/Xsession:
executing /etc/x2go/Xsession.d/90x11-common_ssh-agent Nov 19 02:24:29
moocvm /etc/x2go/Xsession: executing /etc/x2go/Xsession.d/98vboxadd-xclient
Nov 19 02:24:29 moocvm /etc/x2go/Xsession: executing
/etc/x2go/Xsession.d/99upstart Nov 19 02:24:29 moocvm /etc/x2go/Xsession:
executing /etc/x2go/Xsession.d/99x11-common_start Nov 19 02:24:29 moocvm
/usr/bin/x2goruncommand: command /usr/bin/xfce4-session has finished Nov 19
02:24:29 moocvm /usr/bin/x2gofeature: x2gofeature called with options:
X2GO_RUN_EXTENSIONS Nov 19 02:24:29 moocvm
/usr/share/x2go/x2gofeature.d/x2goserver-extensions.features:
x2goserver-extensions.features called with options: X2GO_RUN_EXTENSIONS Nov
19 02:24:29 moocvm /usr/bin/x2goserver-run-extensions:
x2goserver-run-extensions called with options:
mooc-50-1447921445_stDXFCE_dp24 post-runcommand Nov 19 02:24:29 moocvm
/usr/bin/x2gofeature: x2gofeature called with options: X2GO_DESKTOPSHARING
Nov 19 02:24:29 moocvm
/usr/share/x2go/x2gofeature.d/x2goserver-extensions.features:
x2goserver-extensions.features called with options: X2GO_DESKTOPSHARING Nov
19 02:24:29 moocvm /usr/share/x2go/x2gofeature.d/x2goserver.features:
x2goserver.features called with options: X2GO_DESKTOPSHARING Nov 19
02:24:29 moocvm /usr/share/x2go/x2gofeature.d/x2goserver-xsession.features:
x2goserver-xsession.features called with options: X2GO_DESKTOPSHARING Nov
19 02:24:30 moocvm /usr/lib/x2go/x2gochangestatus[3396]: db_changestatus
called, session ID: mooc-50-1447921445_stDXFCE_dp24, new status: F Nov 19
02:24:30 moocvm /usr/bin/x2goumount-session[3404]: x2goumount-session has
been called with options: mooc-50-1447921445_stDXFCE_dp24 Nov 19 02:24:30
moocvm /usr/bin/x2goumount-session[3404]: db_getdisplay called, session ID:
mooc-50-1447921445_stDXFCE_dp24; return value: 50 Nov 19 02:24:30 moocvm
/usr/bin/x2goumount-session[3404]: db_getmounts called, session ID:
mooc-50-1447921445_stDXFCE_dp24; return value:
127.0.0.1|/tmp/.x2go-mooc/spool/C-mooc-50-1447921445_stDXFCE_dp24| Nov 19
02:24:30 moocvm /usr/bin/x2goumount-session[3404]: found mounted share
eric at 127.0.0.1:/home/eric/.x2go/S-mooc-50-1447921445_stDXFCE_dp24/spool
/tmp/.x2go-mooc/spool/C-mooc-50-1447921445_stDXFCE_dp24 fuse.sshfs
rw,nosuid,nodev,default_permissions,user=mooc 0 0 Nov 19 02:24:30 moocvm
/usr/bin/x2goumount-session[3404]: successfully unmounted
"/tmp/.x2go-mooc/spool/C-mooc-50-1447921445_stDXFCE_dp24" Nov 19 02:24:30
moocvm /usr/bin/x2gofeature: x2gofeature called with options:
X2GO_FMBINDINGS Nov 19 02:24:30 moocvm
/usr/share/x2go/x2gofeature.d/x2goserver-extensions.features:
x2goserver-extensions.features called with options: X2GO_FMBINDINGS Nov 19
02:24:30 moocvm /usr/share/x2go/x2gofeature.d/x2goserver.features:
x2goserver.features called with options: X2GO_FMBINDINGS Nov 19 02:24:30
moocvm /usr/share/x2go/x2gofeature.d/x2goserver-xsession.features:
x2goserver-xsession.features called with options: X2GO_FMBINDINGS Nov 19
02:24:30 moocvm /usr/bin/x2goumount-session[3404]: db_deletemount called,
session ID: mooc-50-1447921445_stDXFCE_dp24, path:
/tmp/.x2go-mooc/spool/C-mooc-50-1447921445_stDXFCE_dp24 Nov 19 02:24:31
moocvm /usr/lib/x2go/x2golistsessions_sql[3455]: dbsys_deletemounts called,
session ID: mooc-50-1447921445_stDXFCE_dp24 Nov 19 02:24:31 moocvm
/usr/lib/x2go/x2golistsessions_sql[3455]: Purging finished session from
X2Go db, session ID: mooc-50-1447921445_stDXFCE_dp24 Nov 19 02:24:31 moocvm
/usr/sbin/x2gocleansessions[2157]: mooc-50-1447921445_stDXFCE_dp24 is
blocked Nov 19 02:24:31 moocvm /usr/sbin/x2gocleansessions[2157]:
mooc-50-1447921445_stDXFCE_dp24: unmounting all shares Nov 19 02:24:31
moocvm /usr/bin/x2goumount-session[3467]: x2goumount-session has been
called with options: mooc-50-1447921445_stDXFCE_dp24 Nov 19 02:24:31 moocvm
/usr/bin/x2goumount-session[3467]: db_getdisplay called, session ID:
mooc-50-1447921445_stDXFCE_dp24; return value: Nov 19 02:24:31 moocvm
/usr/bin/x2goumount-session[3467]: db_getmounts called, session ID:
mooc-50-1447921445_stDXFCE_dp24; return value: Nov 19 02:24:31 moocvm
/usr/lib/x2go/x2gormforward[3478]: Terminating SSHD process: 2492