Here are server log during connexion with loglevel=debug :
May 24 09:21:55 test-triolet systemd[1]: Started Session 202 of user root. May 24 09:22:25 test-triolet x2golistsessions_sql: executing external command ,,x2gopath'' with args: libexec May 24 09:22:25 test-triolet x2golistsessions_sql: executing external command ,,/usr/lib/x2go/libx2go-server-db-sqlite3-wrapper'' with args: listsessionsroot,test-triolet May 24 09:22:27 test-triolet x2golistsessions_sql: executing external command ,,x2gopath'' with args: libexec May 24 09:22:27 test-triolet x2golistsessions_sql: executing external command ,,/usr/lib/x2go/libx2go-server-db-sqlite3-wrapper'' with args: listsessionsroot,test-triolet May 24 09:22:29 test-triolet x2golistsessions_sql: executing external command ,,x2gopath'' with args: libexec May 24 09:22:29 test-triolet x2golistsessions_sql: executing external command ,,/usr/lib/x2go/libx2go-server-db-sqlite3-wrapper'' with args: listsessionsroot,test-triolet May 24 09:22:29 test-triolet systemd[1]: Stopping X2Go Server Daemon... May 24 09:22:29 test-triolet systemd[1]: Stopped X2Go Server Daemon. May 24 09:22:29 test-triolet systemd[1]: Starting X2Go Server Daemon... May 24 09:22:29 test-triolet x2gocleansessions: executing external command ,,x2gopath'' with args: libexec May 24 09:22:29 test-triolet x2gocleansessions: executing external command ,,x2gopath'' with args: libexec May 24 09:22:29 test-triolet systemd[1]: Started X2Go Server Daemon. May 24 09:22:31 test-triolet x2gocleansessions: executing external command ,,/usr/lib/x2go/x2golistsessions_sql'' with args: test-triolet May 24 09:22:31 test-triolet x2golistsessions_sql: executing external command ,,x2gopath'' with args: libexec May 24 09:22:31 test-triolet x2golistsessions_sql: executing external command ,,/usr/lib/x2go/libx2go-server-db-sqlite3-wrapper'' with args: listsessionsroot,test-triolet May 24 09:22:33 test-triolet x2gocleansessions: executing external command ,,/usr/lib/x2go/x2golistsessions_sql'' with args: test-triolet May 24 09:22:33 test-triolet x2golistsessions_sql: executing external command ,,x2gopath'' with args: libexec May 24 09:22:34 test-triolet x2golistsessions_sql: executing external command ,,/usr/lib/x2go/libx2go-server-db-sqlite3-wrapper'' with args: listsessionsroot,test-triolet May 24 09:22:36 test-triolet x2gocleansessions: executing external command ,,/usr/lib/x2go/x2golistsessions_sql'' with args: test-triolet May 24 09:22:36 test-triolet x2golistsessions_sql: executing external command ,,x2gopath'' with args: libexec May 24 09:22:36 test-triolet x2golistsessions_sql: executing external command ,,/usr/lib/x2go/libx2go-server-db-sqlite3-wrapper'' with args: listsessionsroot,test-triolet May 24 09:22:38 test-triolet x2gocleansessions: executing external command ,,/usr/lib/x2go/x2golistsessions_sql'' with args: test-triolet May 24 09:22:38 test-triolet x2golistsessions_sql: executing external command ,,x2gopath'' with args: libexec May 24 09:22:38 test-triolet x2golistsessions_sql: executing external command ,,/usr/lib/x2go/libx2go-server-db-sqlite3-wrapper'' with args: listsessionsroot,test-triolet May 24 09:22:40 test-triolet x2gocleansessions: executing external command ,,/usr/lib/x2go/x2golistsessions_sql'' with args: test-triolet May 24 09:22:40 test-triolet x2golistsessions_sql: executing external command ,,x2gopath'' with args: libexec May 24 09:22:40 test-triolet x2golistsessions_sql: executing external command ,,/usr/lib/x2go/libx2go-server-db-sqlite3-wrapper'' with args: listsessionsroot,test-triolet May 24 09:22:42 test-triolet x2gocleansessions: executing external command ,,/usr/lib/x2go/x2golistsessions_sql'' with args: test-triolet May 24 09:22:42 test-triolet x2golistsessions_sql: executing external command ,,x2gopath'' with args: libexec May 24 09:22:42 test-triolet x2golistsessions_sql: executing external command ,,/usr/lib/x2go/libx2go-server-db-sqlite3-wrapper'' with args: listsessionsroot,test-triolet May 24 09:22:44 test-triolet x2gocleansessions: executing external command ,,/usr/lib/x2go/x2golistsessions_sql'' with args: test-triolet May 24 09:22:44 test-triolet x2golistsessions_sql: executing external command ,,x2gopath'' with args: libexec May 24 09:22:44 test-triolet x2golistsessions_sql: executing external command ,,/usr/lib/x2go/libx2go-server-db-sqlite3-wrapper'' with args: listsessionsroot,test-triolet May 24 09:22:46 test-triolet x2gocleansessions: executing external command ,,/usr/lib/x2go/x2golistsessions_sql'' with args: test-triolet May 24 09:22:47 test-triolet x2golistsessions_sql: executing external command ,,x2gopath'' with args: libexec May 24 09:22:47 test-triolet x2golistsessions_sql: executing external command ,,/usr/lib/x2go/libx2go-server-db-sqlite3-wrapper'' with args: listsessionsroot,test-triolet May 24 09:22:49 test-triolet x2gocleansessions: executing external command ,,/usr/lib/x2go/x2golistsessions_sql'' with args: test-triolet May 24 09:22:49 test-triolet x2golistsessions_sql: executing external command ,,x2gopath'' with args: libexec May 24 09:22:49 test-triolet x2golistsessions_sql: executing external command ,,/usr/lib/x2go/libx2go-server-db-sqlite3-wrapper'' with args: listsessionsroot,test-triolet May 24 09:22:49 test-triolet systemd[1]: Started Session 203 of user jkirszling. May 24 09:22:49 test-triolet x2golistsessions: executing external command ,,x2gopath'' with args: libexec May 24 09:22:49 test-triolet x2golistsessions: executing external command ,,x2gopath'' with args: libexec May 24 09:22:49 test-triolet x2golistsessions: x2golistsessions has been called with no option May 24 09:22:49 test-triolet x2golistsessions: executing external command ,,/usr/lib/x2go/libx2go-server-db-sqlite3-wrapper'' with args: listsessions,test-triolet May 24 09:22:49 test-triolet /usr/bin/x2gostartagent: x2gostartagent called with options: 800x600 adsl 16m-jpeg-9 unix-kde-depth_24 us auto 1 D XFCE both May 24 09:22:50 test-triolet /usr/lib/x2go/x2gogetrandomport: x2gogetrandomport called with options: May 24 09:22:50 test-triolet /usr/lib/x2go/x2gogetrandomport: Full SSH port randomization requested. May 24 09:22:50 test-triolet /usr/bin/x2gostartagent: client announced itself as "162.38.105.222" May 24 09:22:50 test-triolet /usr/bin/x2gosessionlimit[26694]: x2gosessionlimit has been called May 24 09:22:50 test-triolet /usr/bin/x2gosessionlimit[26694]: executing external command ,,x2golistsessions'' with args: --all-servers May 24 09:22:50 test-triolet x2golistsessions: executing external command ,,x2gopath'' with args: libexec May 24 09:22:50 test-triolet x2golistsessions: executing external command ,,x2gopath'' with args: libexec May 24 09:22:50 test-triolet x2golistsessions: x2golistsessions has been called with options: --all-servers May 24 09:22:50 test-triolet x2golistsessions: executing external command ,,/usr/lib/x2go/libx2go-server-db-sqlite3-wrapper'' with args: listsessions_all May 24 09:22:50 test-triolet x2gogetdisplays: executing external command ,,x2gopath'' with args: libexec May 24 09:22:50 test-triolet x2gogetdisplays: executing external command ,,/usr/lib/x2go/libx2go-server-db-sqlite3-wrapper'' with args: getdisplays,test-triolet May 24 09:22:50 test-triolet x2gogetdisplays: db_getdisplays called, server: test-triolet; return value: May 24 09:22:50 test-triolet x2gogetports: executing external command ,,x2gopath'' with args: libexec May 24 09:22:50 test-triolet x2gogetports: executing external command ,,/usr/lib/x2go/libx2go-server-db-sqlite3-wrapper'' with args: getports,test-triolet May 24 09:22:50 test-triolet x2gogetports: db_getports called, server: test-triolet; return value: May 24 09:22:50 test-triolet /usr/bin/x2gostartagent: initializing new session with ID jkirszling-50-1527146570_stDXFCE_dp24 May 24 09:22:51 test-triolet x2goinsertsession: executing external command ,,x2gopath'' with args: libexec May 24 09:22:51 test-triolet x2goinsertsession: executing external command ,,/usr/lib/x2go/libx2go-server-db-sqlite3-wrapper'' with args: insertsession,50,test-triolet,jkirszling-50-1527146570_stDXFCE_dp24 May 24 09:22:51 test-triolet x2goinsertsession: db_insertsession called, session ID: jkirszling-50-1527146570_stDXFCE_dp24, server: test-triolet, session ID: jkirszling-50-1527146570_stDXFCE_dp24 May 24 09:22:51 test-triolet x2gogetports: executing external command ,,x2gopath'' with args: libexec May 24 09:22:51 test-triolet x2gogetports: executing external command ,,/usr/lib/x2go/libx2go-server-db-sqlite3-wrapper'' with args: getports,test-triolet May 24 09:22:51 test-triolet x2gocleansessions: executing external command ,,/usr/lib/x2go/x2golistsessions_sql'' with args: test-triolet May 24 09:22:51 test-triolet x2gogetports: db_getports called, server: test-triolet; return value: May 24 09:22:51 test-triolet x2golistsessions_sql: executing external command ,,x2gopath'' with args: libexec May 24 09:22:51 test-triolet x2golistsessions_sql: executing external command ,,/usr/lib/x2go/libx2go-server-db-sqlite3-wrapper'' with args: listsessionsroot,test-triolet May 24 09:22:51 test-triolet x2goinsertport: executing external command ,,x2gopath'' with args: libexec May 24 09:22:51 test-triolet x2goinsertport: executing external command ,,/usr/lib/x2go/libx2go-server-db-sqlite3-wrapper'' with args: insertport,test-triolet,jkirszling-50-1527146570_stDXFCE_dp24,30246 May 24 09:22:51 test-triolet x2gocleansessions: executing external command ,,/usr/lib/x2go/x2gogetstatus'' with args: jkirszling-50-1527146570_stDXFCE_dp24 May 24 09:22:51 test-triolet x2gogetstatus: executing external command ,,x2gopath'' with args: libexec May 24 09:22:51 test-triolet x2gogetstatus: executing external command ,,/usr/lib/x2go/libx2go-server-db-sqlite3-wrapper'' with args: getstatus,jkirszling-50-1527146570_stDXFCE_dp24 May 24 09:22:51 test-triolet x2goinsertport: db_insertport called, session ID: jkirszling-50-1527146570_stDXFCE_dp24, server: test-triolet, SSH port: 30246 May 24 09:22:51 test-triolet x2gogetstatus: db_getstatus called, session ID: jkirszling-50-1527146570_stDXFCE_dp24, return value: R May 24 09:22:51 test-triolet x2gocleansessions: jkirszling-50-1527146570_stDXFCE_dp24: state file for this session does not exist: /tmp/.x2go-jkirszling/C-jkirszling-50-1527146570_stDXFCE_dp24/state (this can be ignored during session startups) May 24 09:22:51 test-triolet x2gogetports: executing external command ,,x2gopath'' with args: libexec May 24 09:22:51 test-triolet x2gogetports: executing external command ,,/usr/lib/x2go/libx2go-server-db-sqlite3-wrapper'' with args: getports,test-triolet May 24 09:22:51 test-triolet x2gogetports: db_getports called, server: test-triolet; return value: |30246| May 24 09:22:51 test-triolet x2goinsertport: executing external command ,,x2gopath'' with args: libexec May 24 09:22:51 test-triolet x2goinsertport: executing external command ,,/usr/lib/x2go/libx2go-server-db-sqlite3-wrapper'' with args: insertport,test-triolet,jkirszling-50-1527146570_stDXFCE_dp24,30247 May 24 09:22:52 test-triolet x2goinsertport: db_insertport called, session ID: jkirszling-50-1527146570_stDXFCE_dp24, server: test-triolet, SSH port: 30247 May 24 09:22:52 test-triolet x2gogetports: executing external command ,,x2gopath'' with args: libexec May 24 09:22:52 test-triolet x2gogetports: executing external command ,,/usr/lib/x2go/libx2go-server-db-sqlite3-wrapper'' with args: getports,test-triolet May 24 09:22:52 test-triolet x2gogetports: db_getports called, server: test-triolet; return value: |30246| |30247| May 24 09:22:52 test-triolet x2goinsertport: executing external command ,,x2gopath'' with args: libexec May 24 09:22:52 test-triolet x2goinsertport: executing external command ,,/usr/lib/x2go/libx2go-server-db-sqlite3-wrapper'' with args: insertport,test-triolet,jkirszling-50-1527146570_stDXFCE_dp24,30248 May 24 09:22:52 test-triolet x2goinsertport: db_insertport called, session ID: jkirszling-50-1527146570_stDXFCE_dp24, server: test-triolet, SSH port: 30248 May 24 09:22:52 test-triolet /usr/bin/x2gofeature: x2gofeature called with options: X2GO_RUN_EXTENSIONS May 24 09:22:52 test-triolet /usr/share/x2go/x2gofeature.d/x2goserver-extensions.features: x2goserver-extensions.features called with options: X2GO_RUN_EXTENSIONS May 24 09:22:52 test-triolet /usr/bin/x2goserver-run-extensions: x2goserver-run-extensions called with options: jkirszling-50-1527146570_stDXFCE_dp24 pre-start May 24 09:22:52 test-triolet /usr/bin/x2gostartagent: started nxagent: NX_TEMP=/tmp x2goagent X2GO_NXAGENT_OPTIONS (' -nolisten tcp') NOLISTOPT ('-nolisten tcp') X2GODPIOPTION_ ('-dpi 96') XDMCPPOPT ('') -SESSION_TYPE ('-D') NOEXITPARAM ('') -auth "XAUTHORITY" ('"/auto_home/jkirszling/.Xauthority"') agent_geometry ('-geometry 800x600') -name "SESSION_WINDOW_TITLE" ('"X2GO-jkirszling-50-1527146570_stDXFCE_dp24"') "NX_AGENT" ('":50"') 2>"SESSION_LOG" ('"/tmp/.x2go-jkirszling/C-jkirszling-50-1527146570_stDXFCE_dp24/session.log"') & May 24 09:22:52 test-triolet /usr/bin/x2gostartagent: creating new session: jkirszling-50-1527146570_stDXFCE_dp24 e38bf19b0d7abb0bc596dfb50f615d35 26820 162.38.105.222 30246 30247 30248 -1 -1 May 24 09:22:52 test-triolet x2gocreatesession: executing external command ,,x2gopath'' with args: libexec May 24 09:22:52 test-triolet x2gocreatesession: executing external command ,,/usr/lib/x2go/libx2go-server-db-sqlite3-wrapper'' with args: createsession,jkirszling-50-1527146570_stDXFCE_dp24,e38bf19b0d7abb0bc596dfb50f615d35,26820,162.38.105.222,30246,30247,30248,-1,-1 May 24 09:22:53 test-triolet x2gocreatesession: db_createsession called, session ID: jkirszling-50-1527146570_stDXFCE_dp24, cookie: e38bf19b0d7abb0bc596dfb50f615d35, client: 162.38.105.222, pid: 26820, graphics port: 30246, sound port: 30247, file sharing port: 30248. telekinesis ctrl port: -1, telekinesis data port: -1 May 24 09:22:53 test-triolet /usr/bin/x2gostartagent: Failed to start X2Go Agent session with ID jkirszling-50-1527146570_stDXFCE_dp24. X2Go Agent terminated unexpectedly. Aborting session startup. May 24 09:22:53 test-triolet /usr/bin/x2gofeature: x2gofeature called with options: X2GO_RUN_EXTENSIONS May 24 09:22:53 test-triolet /usr/share/x2go/x2gofeature.d/x2goserver-extensions.features: x2goserver-extensions.features called with options: X2GO_RUN_EXTENSIONS May 24 09:22:53 test-triolet /usr/bin/x2goserver-run-extensions: x2goserver-run-extensions called with options: jkirszling-50-1527146570_stDXFCE_dp24 fail-start May 24 09:22:53 test-triolet x2gocleansessions: executing external command ,,/usr/lib/x2go/x2golistsessions_sql'' with args: test-triolet May 24 09:22:53 test-triolet x2golistsessions_sql: executing external command ,,x2gopath'' with args: libexec May 24 09:22:53 test-triolet x2golistsessions_sql: executing external command ,,/usr/lib/x2go/libx2go-server-db-sqlite3-wrapper'' with args: listsessionsroot,test-triolet May 24 09:22:53 test-triolet x2gocleansessions: executing external command ,,/usr/lib/x2go/x2gogetstatus'' with args: jkirszling-50-1527146570_stDXFCE_dp24 May 24 09:22:53 test-triolet x2gogetstatus: executing external command ,,x2gopath'' with args: libexec May 24 09:22:53 test-triolet x2gogetstatus: executing external command ,,/usr/lib/x2go/libx2go-server-db-sqlite3-wrapper'' with args: getstatus,jkirszling-50-1527146570_stDXFCE_dp24 May 24 09:22:53 test-triolet x2gogetstatus: db_getstatus called, session ID: jkirszling-50-1527146570_stDXFCE_dp24, return value: R May 24 09:22:55 test-triolet x2gocleansessions: executing external command ,,/usr/lib/x2go/x2golistsessions_sql'' with args: test-triolet May 24 09:22:56 test-triolet x2golistsessions_sql: executing external command ,,x2gopath'' with args: libexec May 24 09:22:56 test-triolet x2golistsessions_sql: executing external command ,,/usr/lib/x2go/libx2go-server-db-sqlite3-wrapper'' with args: listsessionsroot,test-triolet May 24 09:22:56 test-triolet x2gocleansessions: executing external command ,,/usr/lib/x2go/x2gogetstatus'' with args: jkirszling-50-1527146570_stDXFCE_dp24 May 24 09:22:56 test-triolet x2gogetstatus: executing external command ,,x2gopath'' with args: libexec May 24 09:22:56 test-triolet x2gogetstatus: executing external command ,,/usr/lib/x2go/libx2go-server-db-sqlite3-wrapper'' with args: getstatus,jkirszling-50-1527146570_stDXFCE_dp24 May 24 09:22:56 test-triolet x2gogetstatus: db_getstatus called, session ID: jkirszling-50-1527146570_stDXFCE_dp24, return value: R May 24 09:22:58 test-triolet x2gocleansessions: executing external command ,,/usr/lib/x2go/x2golistsessions_sql'' with args: test-triolet May 24 09:22:58 test-triolet x2golistsessions_sql: executing external command ,,x2gopath'' with args: libexec May 24 09:22:58 test-triolet x2golistsessions_sql: executing external command ,,/usr/lib/x2go/libx2go-server-db-sqlite3-wrapper'' with args: listsessionsroot,test-triolet May 24 09:22:58 test-triolet x2gocleansessions: executing external command ,,/usr/lib/x2go/x2gogetstatus'' with args: jkirszling-50-1527146570_stDXFCE_dp24 May 24 09:22:58 test-triolet x2gogetstatus: executing external command ,,x2gopath'' with args: libexec May 24 09:22:58 test-triolet x2gogetstatus: executing external command ,,/usr/lib/x2go/libx2go-server-db-sqlite3-wrapper'' with args: getstatus,jkirszling-50-1527146570_stDXFCE_dp24 May 24 09:22:58 test-triolet x2gogetstatus: db_getstatus called, session ID: jkirszling-50-1527146570_stDXFCE_dp24, return value: R