X2Go Bug report logs - #1269
X2go server crashes on Ubuntu 16.04 starting at 2018-03-08

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Message #5 received at submit@bugs.x2go.org (full text, mbox, reply):

From: krehberg@aol.com

To: submit@bugs.x2go.org

Subject: X2go server crashes on Ubuntu 16.04 starting at 2018-03-08

Date: Fri, 9 Mar 2018 14:14:41 -0500

[Message part 1 (text/plain, inline)]

Package: nxagent
Version: 3.5.99.15 (From the Official Ubuntu PPA)

Hello,

X2go server crashes on Ubuntu 16.04 starting at 2018-03-08.  I am using Windows 10 as the client.  It happens most often when moving the window from one display screen to a second one.  It also happens after a short time online, usually fewer than 5 minutes.  Perhaps a recent Windows 10 update may have caused this since that's the only thing I have changed on these systems.  I am also mounting my Windows 10 drive through the X2go client.  Sound is disabled.

I'm pretty sure nxagent was updated on March 8 to this version:
NXAGENT - Version 3.5.99.15

Here is what I see in the kernel log (dmesg):

[  194.802419] nxagent[3035]: segfault at 0 ip 0000559edeb9c5fb sp 00007ffcbebf71c0 error 4 in nxagent[559edead1000+432000]
[ 9277.059883] nxagent[23367]: segfault at 0 ip 0000562497ecb5fb sp 00007ffcd24230b0 error 4 in nxagent[562497e00000+432000]
[ 9319.625785] nxagent[24275]: segfault at 0 ip 0000557f7e17f5fb sp 00007ffd7cbda740 error 4 in nxagent[557f7e0b4000+432000]
[ 9696.220810] nxagent[25857]: segfault at 0 ip 00005607d52375fb sp 00007ffc87afbb40 error 4 in nxagent[5607d516c000+432000]
[ 9750.298187] nxagent[26894]: segfault at 0 ip 000055c8f5dbd5fb sp 00007ffef53ee0e0 error 4 in nxagent[55c8f5cf2000+432000]

I don't see anything remarkable on the Windows 10 side.

Thank you for your efforts.

Kris Rehberg

[Message part 2 (text/html, inline)]

Message #10 received at 1269@bugs.x2go.org (full text, mbox, reply):

From: Maciej Puzio <maciej@work.swmed.edu>

To: 1269@bugs.x2go.org

Subject: X2go server crashes on Ubuntu 16.04

Date: Tue, 13 Mar 2018 16:53:17 -0500

Package: nxagent
Version: 3.5.99.15-0~201803072246~ubuntu16.04.1
Severity: grave

I can confirm this bug and would like to ask that its severity is changed to GRAVE, as it makes x2go server unusable.

In a nutshell: attempt of starting a session on a client causes a window to briefly appear and then disappear. Server syslog shows a segfault:
kernel: [ 3899.187248] nxagent[7306]: segfault at 0 ip 0000558c9d0045fb sp 00007ffdad91c1f0 error 4 in nxagent[558c9cf39000+432000]

In my case, a routine system update (apt-get update && apt-get dist-upgrade) rendered a production server unusable, with no way to rollback the botched x2go update.
The issue did not appear before the update. I also recreated the issue on a vanilla Ubuntu 16.04 server running in a VM. I use this install as a basis for the description below.

Versions - server:
x2goserver: 4.1.0.0-0~1517~ubuntu16.04.1
nxagent:    3.5.99.15-0~201803072246~ubuntu16.04.1
uname -a:   4.4.0-116-generic
lsb_release -d: Ubuntu 16.04.4 LTS

Versions - client:
x2goclient: 4.0.5.1-1
uname -a:   4.13.0-32-generic
lsb_release -d: Ubuntu 16.04.3 LTS


Steps to reproduce:

1. Install Ubuntu 16.04 server in a VM (from ubuntu-16.04.3-server-amd64.iso downloaded from ubuntu.com).

2. Update the system (apt-get update && apt-get dist-upgrade) and reboot.

3. Install x2go as described on https://wiki.x2go.org/doku.php/wiki:repositories:ubuntu
   All commands run as root (sudo su -)
   apt-add-repository ppa:x2go/stable
   apt-get update
   apt-get install x2goserver x2goserver-xsession --no-install-recommends

4. Install minimal XFCE desktop:
   apt-get install xfwm4 xfce4-panel xfce4-settings xfce4-session xfce4-terminal xfdesktop4 xfce4-taskmanager xfce4-appfinder xfce4-artwork --no-install-recommends

5. Attempt to connect with a x2go client from another machine:
   x2goclient version: 4.0.5.1-1

----------------------------

Messages on client side

NXPROXY - Version 3.5.0

Copyright (C) 2001, 2011 NoMachine.
See http://www.nomachine.com/ for more information.

Info: Proxy running in client mode with pid '16432'.
Session: Starting session at 'Tue Mar 13 16:10:36 2018'.
Info: Connecting to remote host 'localhost:37853'.
Info: Connection to remote proxy 'localhost:37853' established.
Info: Connection with remote proxy completed.
Warning: Unrecognized session type 'unix-kde-depth_24'. Assuming agent session.
Info: Using LAN link parameters 1536/24/1/0.
Info: Using pack method '16m-jpeg-9' with session 'unix-kde-depth_24'.
Info: Not using NX delta compression.
Info: Not using ZLIB data compression.
Info: Not using ZLIB stream compression.
Info: Not using a persistent caError: Failure reading from the peer proxy.
Error: Connection with remote peer broken.
Error: Please check the state of your network and retry.
Session: Terminating session at 'Tue Mar 13 16:10:37 2018'.
Session: Session terminated at 'Tue Mar 13 16:10:37 2018'.
che.
Info: Forwarding X11 connections to display ':0'.
Session: Session started at 'Tue Mar 13 16:10:36 2018'.
Info: Established X server connection.
Info: Using shared memory parameters 0/0K.

----------------------------

Server syslog messages (with log level: debug)

Mar 13 16:03:59 nano systemd[1]: Started Session 5 of user testuser.
Mar 13 16:03:59 nano x2golistsessions: executing external command ,,x2gopath'' with args: libexec
Mar 13 16:03:59 nano x2golistsessions: executing external command ,,x2gopath'' with args: libexec
Mar 13 16:03:59 nano x2golistsessions: x2golistsessions has been called with no option
Mar 13 16:03:59 nano x2golistsessions: executing external command ,,/usr/lib/x2go/libx2go-server-db-sqlite3-wrapper'' with args: listsessions,nano
Mar 13 16:03:59 nano /usr/bin/x2gostartagent: x2gostartagent called with options: 1920x1150 lan 16m-jpeg-9 unix-kde-depth_24 us auto 1 D XFCE both
Mar 13 16:03:59 nano /usr/lib/x2go/x2gogetrandomport: x2gogetrandomport called with options:
Mar 13 16:03:59 nano /usr/lib/x2go/x2gogetrandomport: Full SSH port randomization requested.
Mar 13 16:03:59 nano /usr/bin/x2gostartagent: client announced itself as "129.112.10.165"
Mar 13 16:03:59 nano /usr/bin/x2gosessionlimit[7186]: x2gosessionlimit has been called
Mar 13 16:03:59 nano /usr/bin/x2gosessionlimit[7186]: executing external command ,,x2golistsessions'' with args: --all-servers
Mar 13 16:03:59 nano x2golistsessions: executing external command ,,x2gopath'' with args: libexec
Mar 13 16:03:59 nano x2golistsessions: executing external command ,,x2gopath'' with args: libexec
Mar 13 16:03:59 nano x2golistsessions: x2golistsessions has been called with options: --all-servers
Mar 13 16:03:59 nano x2golistsessions: executing external command ,,/usr/lib/x2go/libx2go-server-db-sqlite3-wrapper'' with args: listsessions_all
Mar 13 16:03:59 nano x2gogetdisplays: executing external command ,,x2gopath'' with args: libexec
Mar 13 16:03:59 nano x2gogetdisplays: executing external command ,,/usr/lib/x2go/libx2go-server-db-sqlite3-wrapper'' with args: getdisplays,nano
Mar 13 16:03:59 nano x2gogetdisplays: db_getdisplays called, server: nano; return value:
Mar 13 16:03:59 nano x2gogetports: executing external command ,,x2gopath'' with args: libexec
Mar 13 16:03:59 nano x2gogetports: executing external command ,,/usr/lib/x2go/libx2go-server-db-sqlite3-wrapper'' with args: getports,nano
Mar 13 16:04:00 nano x2gogetports: db_getports called, server: nano; return value:
Mar 13 16:04:00 nano /usr/bin/x2gostartagent: initializing new session with ID testuser-50-1520975040_stDXFCE_dp24
Mar 13 16:04:00 nano x2goinsertsession: executing external command ,,x2gopath'' with args: libexec
Mar 13 16:04:00 nano x2goinsertsession: executing external command ,,/usr/lib/x2go/libx2go-server-db-sqlite3-wrapper'' with args: insertsession,50,nano,testuser-50-1520975040_stDXFCE_dp24
Mar 13 16:04:00 nano x2goinsertsession: db_insertsession called, session ID: testuser-50-1520975040_stDXFCE_dp24, server: nano, session ID: testuser-50-1520975040_stDXFCE_dp24
Mar 13 16:04:00 nano x2gogetports: executing external command ,,x2gopath'' with args: libexec
Mar 13 16:04:00 nano x2gogetports: executing external command ,,/usr/lib/x2go/libx2go-server-db-sqlite3-wrapper'' with args: getports,nano
Mar 13 16:04:00 nano x2gogetports: db_getports called, server: nano; return value:
Mar 13 16:04:00 nano x2goinsertport: executing external command ,,x2gopath'' with args: libexec
Mar 13 16:04:00 nano x2goinsertport: executing external command ,,/usr/lib/x2go/libx2go-server-db-sqlite3-wrapper'' with args: insertport,nano,testuser-50-1520975040_stDXFCE_dp24,49992
Mar 13 16:04:00 nano x2goinsertport: db_insertport called, session ID: testuser-50-1520975040_stDXFCE_dp24, server: nano, SSH port: 49992
Mar 13 16:04:00 nano x2gogetports: executing external command ,,x2gopath'' with args: libexec
Mar 13 16:04:00 nano x2gogetports: executing external command ,,/usr/lib/x2go/libx2go-server-db-sqlite3-wrapper'' with args: getports,nano
Mar 13 16:04:00 nano x2gogetports: db_getports called, server: nano; return value: |49992|
Mar 13 16:04:00 nano x2goinsertport: executing external command ,,x2gopath'' with args: libexec
Mar 13 16:04:00 nano x2goinsertport: executing external command ,,/usr/lib/x2go/libx2go-server-db-sqlite3-wrapper'' with args: insertport,nano,testuser-50-1520975040_stDXFCE_dp24,49993
Mar 13 16:04:00 nano x2goinsertport: db_insertport called, session ID: testuser-50-1520975040_stDXFCE_dp24, server: nano, SSH port: 49993
Mar 13 16:04:00 nano x2gogetports: executing external command ,,x2gopath'' with args: libexec
Mar 13 16:04:00 nano x2gogetports: executing external command ,,/usr/lib/x2go/libx2go-server-db-sqlite3-wrapper'' with args: getports,nano
Mar 13 16:04:00 nano x2gogetports: db_getports called, server: nano; return value: |49992| |49993|
Mar 13 16:04:00 nano x2goinsertport: executing external command ,,x2gopath'' with args: libexec
Mar 13 16:04:00 nano x2goinsertport: executing external command ,,/usr/lib/x2go/libx2go-server-db-sqlite3-wrapper'' with args: insertport,nano,testuser-50-1520975040_stDXFCE_dp24,49994
Mar 13 16:04:01 nano x2goinsertport: db_insertport called, session ID: testuser-50-1520975040_stDXFCE_dp24, server: nano, SSH port: 49994
Mar 13 16:04:01 nano /usr/bin/x2gofeature: x2gofeature called with options: X2GO_RUN_EXTENSIONS
Mar 13 16:04:01 nano /usr/share/x2go/x2gofeature.d/x2goserver.features: x2goserver.features called with options: X2GO_RUN_EXTENSIONS
Mar 13 16:04:01 nano /usr/share/x2go/x2gofeature.d/x2goserver-x2goagent.features: x2goserver-x2goagent.features called with options: X2GO_RUN_EXTENSIONS
Mar 13 16:04:01 nano /usr/share/x2go/x2gofeature.d/x2goserver-xsession.features: x2goserver-xsession.features called with options: X2GO_RUN_EXTENSIONS
Mar 13 16:04:01 nano /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" ('"/home/testuser/.Xauthority"') agent_geometry ('-geometry 1920x1150') -name "SESSION_WINDOW_TITLE" ('"X2GO-testuser-50-1520975040_stDXFCE_dp24"') "NX_AGENT" ('":50"') 2>"SESSION_LOG" ('"/tmp/.x2go-testuser/C-testuser-50-1520975040_stDXFCE_dp24/session.log"') &
Mar 13 16:04:01 nano /usr/bin/x2gostartagent: creating new session: testuser-50-1520975040_stDXFCE_dp24 69296b548dda88e17aa006bccb70a4e5 7306 129.112.10.165 49992 49993 49994 -1 -1
Mar 13 16:04:01 nano x2gocreatesession: executing external command ,,x2gopath'' with args: libexec
Mar 13 16:04:01 nano x2gocreatesession: executing external command ,,/usr/lib/x2go/libx2go-server-db-sqlite3-wrapper'' with args: createsession,testuser-50-1520975040_stDXFCE_dp24,69296b548dda88e17aa006bccb70a4e5,7306,129.112.10.165,49992,49993,49994,-1,-1
Mar 13 16:04:01 nano x2gocreatesession: db_createsession called, session ID: testuser-50-1520975040_stDXFCE_dp24, cookie: 69296b548dda88e17aa006bccb70a4e5, client: 129.112.10.165, pid: 7306, graphics port: 49992, sound port: 49993, file sharing port: 49994. telekinesis ctrl port: -1, telekinesis data port: -1
Mar 13 16:04:01 nano /usr/bin/x2gostartagent: successfully started X2Go Agent session with ID testuser-50-1520975040_stDXFCE_dp24
Mar 13 16:04:01 nano /usr/bin/x2gofeature: x2gofeature called with options: X2GO_RUN_EXTENSIONS
Mar 13 16:04:01 nano /usr/share/x2go/x2gofeature.d/x2goserver.features: x2goserver.features called with options: X2GO_RUN_EXTENSIONS
Mar 13 16:04:01 nano /usr/share/x2go/x2gofeature.d/x2goserver-x2goagent.features: x2goserver-x2goagent.features called with options: X2GO_RUN_EXTENSIONS
Mar 13 16:04:01 nano /usr/share/x2go/x2gofeature.d/x2goserver-xsession.features: x2goserver-xsession.features called with options: X2GO_RUN_EXTENSIONS
Mar 13 16:04:01 nano /usr/bin/x2goruncommand: x2goruncommand called with options: 50 7306 testuser-50-1520975040_stDXFCE_dp24 49993 xfce4-session nosnd D
Mar 13 16:04:01 nano /usr/bin/x2gofeature: x2gofeature called with options: X2GOAGENT_RANDRXINERAMA
Mar 13 16:04:01 nano /usr/share/x2go/x2gofeature.d/x2goserver.features: x2goserver.features called with options: X2GOAGENT_RANDRXINERAMA
Mar 13 16:04:01 nano /usr/share/x2go/x2gofeature.d/x2goserver-x2goagent.features: x2goserver-x2goagent.features called with options: X2GOAGENT_RANDRXINERAMA
Mar 13 16:04:01 nano /usr/bin/x2gofeature: x2gofeature called with options: X2GO_RUN_EXTENSIONS
Mar 13 16:04:01 nano /usr/share/x2go/x2gofeature.d/x2goserver.features: x2goserver.features called with options: X2GO_RUN_EXTENSIONS
Mar 13 16:04:01 nano /usr/share/x2go/x2gofeature.d/x2goserver-x2goagent.features: x2goserver-x2goagent.features called with options: X2GO_RUN_EXTENSIONS
Mar 13 16:04:01 nano /usr/share/x2go/x2gofeature.d/x2goserver-xsession.features: x2goserver-xsession.features called with options: X2GO_RUN_EXTENSIONS
Mar 13 16:04:01 nano /usr/bin/x2goruncommand: running command /usr/bin/xfce4-session
Mar 13 16:04:01 nano /usr/bin/x2gosetkeyboard: x2gosetkeyboard called with options:
Mar 13 16:04:01 nano /usr/bin/x2gofeature: x2gofeature called with options: X2GO_XSESSION
Mar 13 16:04:01 nano /usr/bin/x2gosetkeyboard: Setting X keyboard according to /home/testuser/.x2go/C-testuser-50-1520975040_stDXFCE_dp24/keyboard
Mar 13 16:04:01 nano /usr/share/x2go/x2gofeature.d/x2goserver.features: x2goserver.features called with options: X2GO_XSESSION
Mar 13 16:04:02 nano /usr/share/x2go/x2gofeature.d/x2goserver-x2goagent.features: x2goserver-x2goagent.features called with options: X2GO_XSESSION
Mar 13 16:04:02 nano /usr/share/x2go/x2gofeature.d/x2goserver-xsession.features: x2goserver-xsession.features called with options: X2GO_XSESSION
Mar 13 16:04:02 nano /usr/bin/x2goruncommand: launching session with Xsession-x2go mechanism, using STARTUP="xfce4-session"
Mar 13 16:04:02 nano /usr/bin/x2goruncommand: dbus wrapper available as /usr/bin/dbus-run-session
Mar 13 16:04:02 nano /etc/x2go/Xsession: executing /etc/x2go/Xsession.d/20x11-common_process-args
Mar 13 16:04:02 nano /etc/x2go/Xsession: executing /etc/x2go/Xsession.d/30x11-common_xresources
Mar 13 16:04:02 nano /etc/x2go/Xsession: executing /etc/x2go/Xsession.d/35x11-common_xhost-local
Mar 13 16:04:02 nano /etc/x2go/Xsession: executing /etc/x2go/Xsession.d/40x11-common_xsessionrc
Mar 13 16:04:02 nano /etc/x2go/Xsession: executing /etc/x2go/Xsession.d/50x11-common_determine-startup
Mar 13 16:04:02 nano /etc/x2go/Xsession: executing /etc/x2go/Xsession.d/55xfce4-session
Mar 13 16:04:02 nano /etc/x2go/Xsession: executing /etc/x2go/Xsession.d/60x11-common_localhost
Mar 13 16:04:02 nano /etc/x2go/Xsession: executing /etc/x2go/Xsession.d/60x11-common_xdg_path
Mar 13 16:04:02 nano /etc/x2go/Xsession: executing /etc/x2go/Xsession.d/60xdg-user-dirs-update
Mar 13 16:04:02 nano /etc/x2go/Xsession: executing /etc/x2go/Xsession.d/65snappy
Mar 13 16:04:02 nano /etc/x2go/Xsession: executing /etc/x2go/Xsession.d/75dbus_dbus-launch
Mar 13 16:04:02 nano /etc/x2go/Xsession: executing /etc/x2go/Xsession.d/90x11-common_ssh-agent
Mar 13 16:04:02 nano /etc/x2go/Xsession: executing /etc/x2go/Xsession.d/95dbus_update-activation-env
Mar 13 16:04:02 nano /etc/x2go/Xsession: executing /etc/x2go/Xsession.d/99x11-common_start
Mar 13 16:04:02 nano kernel: [ 3899.187248] nxagent[7306]: segfault at 0 ip 0000558c9d0045fb sp 00007ffdad91c1f0 error 4 in nxagent[558c9cf39000+432000]
Mar 13 16:04:02 nano /usr/bin/x2goruncommand: command /usr/bin/xfce4-session has finished
Mar 13 16:04:02 nano /usr/bin/x2gofeature: x2gofeature called with options: X2GO_RUN_EXTENSIONS
Mar 13 16:04:02 nano /usr/bin/x2gocmdexitmessage: x2gocmdexitmessage called with options: testuser-50-1520975040_stDXFCE_dp24
Mar 13 16:04:02 nano /usr/share/x2go/x2gofeature.d/x2goserver.features: x2goserver.features called with options: X2GO_RUN_EXTENSIONS
Mar 13 16:04:02 nano /usr/bin/x2gocmdexitmessage: command output starts with: exec xfce4-session Loading profile from /etc/profile Loading profile from /home/testuser/.profile Activating service name='org.freedesktop.systemd1' Activated service 'org.freedesktop.systemd1' failed: Process org.freedesktop.systemd1 exited with status 1
Mar 13 16:04:02 nano /usr/share/x2go/x2gofeature.d/x2goserver-x2goagent.features: x2goserver-x2goagent.features called with options: X2GO_RUN_EXTENSIONS
Mar 13 16:04:03 nano /usr/share/x2go/x2gofeature.d/x2goserver-xsession.features: x2goserver-xsession.features called with options: X2GO_RUN_EXTENSIONS
Mar 13 16:04:03 nano /usr/bin/x2gofeature: x2gofeature called with options: X2GO_DESKTOPSHARING
Mar 13 16:04:03 nano /usr/share/x2go/x2gofeature.d/x2goserver.features: x2goserver.features called with options: X2GO_DESKTOPSHARING
Mar 13 16:04:03 nano /usr/share/x2go/x2gofeature.d/x2goserver-x2goagent.features: x2goserver-x2goagent.features called with options: X2GO_DESKTOPSHARING
Mar 13 16:04:03 nano /usr/share/x2go/x2gofeature.d/x2goserver-xsession.features: x2goserver-xsession.features called with options: X2GO_DESKTOPSHARING
Mar 13 16:04:03 nano x2gochangestatus: executing external command ,,x2gopath'' with args: libexec
Mar 13 16:04:03 nano x2gochangestatus: executing external command ,,/usr/lib/x2go/libx2go-server-db-sqlite3-wrapper'' with args: changestatus,F,testuser-50-1520975040_stDXFCE_dp24
Mar 13 16:04:03 nano x2gochangestatus: db_changestatus called, session ID: testuser-50-1520975040_stDXFCE_dp24, new status: F
Mar 13 16:04:03 nano x2goumount-session: executing external command ,,x2gopath'' with args: libexec
Mar 13 16:04:03 nano x2goumount-session: x2goumount-session has been called with options: testuser-50-1520975040_stDXFCE_dp24
Mar 13 16:04:03 nano x2goumount-session: executing external command ,,/usr/lib/x2go/libx2go-server-db-sqlite3-wrapper'' with args: getdisplay,testuser-50-1520975040_stDXFCE_dp24
Mar 13 16:04:03 nano x2goumount-session: db_getdisplay called, session ID: testuser-50-1520975040_stDXFCE_dp24; return value: 50
Mar 13 16:04:03 nano x2goumount-session: executing external command ,,/usr/lib/x2go/libx2go-server-db-sqlite3-wrapper'' with args: getmounts,testuser-50-1520975040_stDXFCE_dp24
Mar 13 16:04:03 nano x2goumount-session: db_getmounts called, session ID: testuser-50-1520975040_stDXFCE_dp24; return value:

----------------------------

[my bug# 298]

Message #15 received at 1269@bugs.x2go.org (full text, mbox, reply):

From: Philip Kollmannsberger <philipk@gmx.net>

To: 1269@bugs.x2go.org

Subject: X2go server crashes on Ubuntu 16.04

Date: Wed, 14 Mar 2018 09:58:56 +0100

package: nxagent
Version: 3.5.99.15-0~201803072246~ubuntu16.04.1
Severity: grave

We have the same problem here after upgrading x2go from 4.0.1.22 to 4.1.0.0.

It is independent of client version and OS (both Linux and Windows), and
seems to be related to Xinerama:

- when enabling Xinerama support in the client, x2go works in
fullscreen, but leads to a crash in windowed mode as soon as the window
is resized or moved to a different display.

- when disabling Xinerama support, everything seems ok

The log shows a segfault of nxagent, exactly as described above.

Message #20 received at 1269@bugs.x2go.org (full text, mbox, reply):

From: Maciej Puzio <maciej@work.swmed.edu>

To: 1269@bugs.x2go.org

Subject: X2go server crashes on Ubuntu 16.04

Date: Wed, 14 Mar 2018 14:06:32 -0500

Philip, thank you for your report, but I think you are experiencing a different issue, though perhaps related.
In my case, every attempt to open an x2go session fails (and I have Xinerama disabled).
I have reverted to the state before the update (with x2goserver 4.0.1.22-0~1197~ubuntu16.04.1 and nxagent 3.5.0.33-0~710~ubuntu16.04.1), which works fine.

May I again ask the admin of x2go bug database to change the severity of this bug to grave, or I will file a duplicate bug report. Thank you very much.

Message #25 received at 1269@bugs.x2go.org (full text, mbox, reply):

From: Maciej Puzio <maciej@work.swmed.edu>

To: 1269@bugs.x2go.org

Subject: X2go server crashes on Ubuntu 16.04

Date: Wed, 14 Mar 2018 17:16:38 -0500

Seeing that my issue is indeed different from both other submitters, I decided to go ahead and post a separate report (bug 1272).
https://bugs.x2go.org/cgi-bin/bugreport.cgi?bug=1272
The underlying cause may be turn out to be the same, so my new bug report may end up being a duplicate, or maybe not; difficult to say at this point.
Please everyone who suffers from a segfaulty nxagent after a recent update to post to one of these bug reports. We need to attract developers' attention.

Message #30 received at 1269@bugs.x2go.org (full text, mbox, reply):

From: Philip Kollmannsberger <Philip.Kollmannsberger@uni-wuerzburg.de>

To: 1269@bugs.x2go.org

Subject: X2goserver crashes on Ubuntu 16.04

Date: Thu, 15 Mar 2018 11:17:09 +0100

This bug might be related to these issues on the Arctica nx-libs repo on
github:

https://github.com/ArcticaProject/nx-libs/issues/679
https://github.com/ArcticaProject/nx-libs/issues/677

With the most recent nightly build, moving and rezising between displays
in windowed mode works fine again.

Message #35 received at 1269@bugs.x2go.org (full text, mbox, reply):

From: Maciej Puzio <maciej@work.swmed.edu>

To: 1269@bugs.x2go.org

Subject: X2go server crashes on Ubuntu 16.04

Date: Thu, 15 Mar 2018 18:15:21 -0500

Philip, thanks a lot for the links to the Arctica bugs. 
While my symptoms are somewhat different (the crash occurs "automatically", just after the login, no window movement is necessary), 
the underlying cause is probably the same. As the Arctica report suggests, the problem is in fact dependent on the dual-screen 
configuration on the client side, and is solved by the fixed packages in the nightly build.

Message #50 received at 1269@bugs.x2go.org (full text, mbox, reply):

From: krehberg@aol.com

To: 1269@bugs.x2go.org

Subject: Re: Bug#1269: Acknowledgement (X2go server crashes on Ubuntu 16.04 starting at 2018-03-08)

Date: Thu, 15 Mar 2018 23:14:26 -0400

[Message part 1 (text/plain, inline)]

I updated both the Windows 10 client and the Ubuntu 16.04 server to the very latest releases and the problem has disappeared.

Thank you for your help.  My server may have been a little too old for the new client version I was using.


 

 

 

-----Original Message-----
From: X2Go Bug Tracking System <owner@bugs.x2go.org>
To: krehberg <krehberg@aol.com>
Sent: Fri, Mar 9, 2018 2:15 pm
Subject: Bug#1269: Acknowledgement (X2go server crashes on Ubuntu 16.04 starting at 2018-03-08)

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Message #59 received at 1269-quiet@bugs.x2go.org (full text, mbox, reply):

From: Stefan Baur <X2Go-ML-1@baur-itcs.de>

To: 1269-quiet@bugs.x2go.org

Subject: Closing/Archiving as requested by original submitter

Date: Tue, 30 Jan 2024 23:06:29 +0100

Control: close -1
Control: archive -1


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