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Bug 1433420 - [abrt] xfwm4: XGetXCBConnection(): xfwm4 killed by SIGSEGV
Summary: [abrt] xfwm4: XGetXCBConnection(): xfwm4 killed by SIGSEGV
Keywords:
Status: CLOSED EOL
Alias: None
Product: Fedora
Classification: Fedora
Component: x2goserver
Version: 25
Hardware: x86_64
OS: Unspecified
unspecified
unspecified
Target Milestone: ---
Assignee: Orion Poplawski
QA Contact: Fedora Extras Quality Assurance
URL: https://retrace.fedoraproject.org/faf...
Whiteboard: abrt_hash:ad4d1158353b721eff1dff0d7cb...
: 1433419 1433449 1435677 (view as bug list)
Depends On:
Blocks:
TreeView+ depends on / blocked
 
Reported: 2017-03-17 15:44 UTC by RobbieTheK
Modified: 2017-12-12 10:43 UTC (History)
7 users (show)

Fixed In Version: xfwm4-4.12.4-1.fc26 xfwm4-4.12.4-1.fc25
Doc Type: If docs needed, set a value
Doc Text:
Clone Of:
Environment:
Last Closed: 2017-12-12 10:43:16 UTC
Type: ---
Embargoed:


Attachments (Terms of Use)
File: backtrace (deleted)
2017-03-17 15:44 UTC, RobbieTheK
no flags Details
File: cgroup (deleted)
2017-03-17 15:44 UTC, RobbieTheK
no flags Details
File: core_backtrace (deleted)
2017-03-17 15:44 UTC, RobbieTheK
no flags Details
File: dso_list (deleted)
2017-03-17 15:44 UTC, RobbieTheK
no flags Details
File: environ (deleted)
2017-03-17 15:44 UTC, RobbieTheK
no flags Details
File: limits (deleted)
2017-03-17 15:44 UTC, RobbieTheK
no flags Details
File: maps (deleted)
2017-03-17 15:44 UTC, RobbieTheK
no flags Details
File: mountinfo (deleted)
2017-03-17 15:44 UTC, RobbieTheK
no flags Details
File: namespaces (deleted)
2017-03-17 15:44 UTC, RobbieTheK
no flags Details
File: open_fds (deleted)
2017-03-17 15:44 UTC, RobbieTheK
no flags Details
File: proc_pid_status (deleted)
2017-03-17 15:44 UTC, RobbieTheK
no flags Details
File: var_log_messages (deleted)
2017-03-17 15:44 UTC, RobbieTheK
no flags Details
core dump (deleted)
2017-03-21 18:50 UTC, RobbieTheK
no flags Details
xfwm4 core file (deleted)
2017-04-07 13:14 UTC, RobbieTheK
no flags Details
coredump (deleted)
2017-04-07 16:51 UTC, RobbieTheK
no flags Details


Links
System ID Private Priority Status Summary Last Updated
Red Hat Bugzilla 1433419 0 unspecified CLOSED [abrt] xfdesktop: XGetXCBConnection(): xfdesktop killed by SIGSEGV 2021-02-22 00:41:40 UTC
Red Hat Bugzilla 1433449 0 unspecified CLOSED [abrt] glx-utils: XGetXCBConnection(): glxinfo killed by SIGSEGV 2021-02-22 00:41:40 UTC
Red Hat Bugzilla 1435677 0 unspecified CLOSED [abrt] pulseaudio: XGetXCBConnection(): pulseaudio killed by SIGSEGV 2021-02-22 00:41:40 UTC
Xfce 13456 0 None None None 2017-03-23 23:49:31 UTC

Description RobbieTheK 2017-03-17 15:44:04 UTC
Version-Release number of selected component:
xfwm4-4.12.3-3.fc24

Additional info:
reporter:       libreport-2.8.0
backtrace_rating: 4
cmdline:        xfwm4
crash_function: XGetXCBConnection
executable:     /usr/bin/xfwm4
global_pid:     30977
kernel:         4.9.8-201.fc25.x86_64
pkg_fingerprint: 73BD E983 81B4 6521
pkg_vendor:     Fedora Project
runlevel:       N 5
type:           CCpp
uid:            6105

Truncated backtrace:
Thread no. 1 (4 frames)
 #0 XGetXCBConnection at x11_xcb.c:9
 #1 sn_display_new at sn-common.c:77
 #2 sn_init_display at startup_notification.c:321
 #3 initialize at main.c:537

Comment 1 RobbieTheK 2017-03-17 15:44:08 UTC
Created attachment 1264078 [details]
File: backtrace

Comment 2 RobbieTheK 2017-03-17 15:44:09 UTC
Created attachment 1264079 [details]
File: cgroup

Comment 3 RobbieTheK 2017-03-17 15:44:10 UTC
Created attachment 1264080 [details]
File: core_backtrace

Comment 4 RobbieTheK 2017-03-17 15:44:11 UTC
Created attachment 1264081 [details]
File: dso_list

Comment 5 RobbieTheK 2017-03-17 15:44:12 UTC
Created attachment 1264082 [details]
File: environ

Comment 6 RobbieTheK 2017-03-17 15:44:13 UTC
Created attachment 1264083 [details]
File: limits

Comment 7 RobbieTheK 2017-03-17 15:44:14 UTC
Created attachment 1264084 [details]
File: maps

Comment 8 RobbieTheK 2017-03-17 15:44:15 UTC
Created attachment 1264085 [details]
File: mountinfo

Comment 9 RobbieTheK 2017-03-17 15:44:16 UTC
Created attachment 1264086 [details]
File: namespaces

Comment 10 RobbieTheK 2017-03-17 15:44:17 UTC
Created attachment 1264087 [details]
File: open_fds

Comment 11 RobbieTheK 2017-03-17 15:44:18 UTC
Created attachment 1264088 [details]
File: proc_pid_status

Comment 12 RobbieTheK 2017-03-17 15:44:19 UTC
Created attachment 1264089 [details]
File: var_log_messages

Comment 13 Kevin Fenzi 2017-03-18 16:52:58 UTC
What were you doing when this happened?

Can you duplicate the crash?

Comment 14 RobbieTheK 2017-03-18 17:04:38 UTC
Yes using X2Go from a PC and the XFCE dropdown, it starts and then just quits.

Comment 15 Fedora Update System 2017-03-20 01:00:27 UTC
xfwm4-4.12.4-1.fc25 has been submitted as an update to Fedora 25. https://bodhi.fedoraproject.org/updates/FEDORA-2017-ee90e7b000

Comment 16 Fedora Update System 2017-03-20 01:00:40 UTC
xfwm4-4.12.4-1.fc26 has been submitted as an update to Fedora 26. https://bodhi.fedoraproject.org/updates/FEDORA-2017-15853d2654

Comment 17 Fedora Update System 2017-03-21 05:21:01 UTC
xfwm4-4.12.4-1.fc25 has been pushed to the Fedora 25 testing repository. If problems still persist, please make note of it in this bug report.
See https://fedoraproject.org/wiki/QA:Updates_Testing for
instructions on how to install test updates.
You can provide feedback for this update here: https://bodhi.fedoraproject.org/updates/FEDORA-2017-ee90e7b000

Comment 18 Fedora Update System 2017-03-21 14:24:17 UTC
xfwm4-4.12.4-1.fc26 has been pushed to the Fedora 26 testing repository. If problems still persist, please make note of it in this bug report.
See https://fedoraproject.org/wiki/QA:Updates_Testing for
instructions on how to install test updates.
You can provide feedback for this update here: https://bodhi.fedoraproject.org/updates/FEDORA-2017-15853d2654

Comment 19 RobbieTheK 2017-03-21 18:49:56 UTC
rpm -q xfwm4
xfwm4-4.12.4-1.fc25.x86_64

Still crashes & coredump on Fedora 25.

dbus-daemon[8871]: [session uid=6105 pid=8869] Successfully activated service 'org.gtk.vfs.AfcVolumeMonitor'
kernel: xfce4-panel[9393]: segfault at 0 ip 00007f634e4826a7 sp 00007ffc5bef8858 error 4 in libX11-xcb.so.1.0.0[7f634e482000+1000]
systemd-coredump: Process 9393 (xfce4-panel) of user 6105 dumped core.#012#012Stack trace of thread 9393:#012#0  0x00007f634e4826a7 XGetXCBConnection (libX11-xcb.so.1)#012#1  0x00007f6352cfe1b2 sn_display_new (libstartup-notification-1.so.0)#012#2  0x00007f63565b267f wnck_screen_get (libwnck-1.so.22)#012#3  0x000055bb4e3a156a panel_window_screen_changed (xfce4-panel)#012#4  0x00007f63550767fb g_type_create_instance (libgobject-2.0.so.0)#012#5  0x00007f635505869b g_object_new_internal (libgobject-2.0.so.0)#012#6  0x00007f635505a5ae g_object_new_valist (libgobject-2.0.so.0)#012#7  0x00007f635505a851 g_object_new (libgobject-2.0.so.0)#012#8  0x000055bb4e3a3e38 panel_window_new (xfce4-panel)#012#9  0x000055bb4e3890b2 panel_application_new_window (xfce4-panel)#012#10 0x000055bb4e3893cc panel_application_load_real (xfce4-panel)#012#11 0x000055bb4e3897bc panel_application_wait_for_window_manager_destroyed (xfce4-panel)#012#12 0x00007f6354d77938 g_source_callback_unref (libglib-2.0.so.0)#012#13 0x00007f6354d79106 g_source_destroy_internal (libglib-2.0.so.0)#012#14 0x00007f6354d7af00 g_main_context_dispatch (libglib-2.0.so.0)#012#15 0x00007f6354d7b1d0 g_main_context_iterate.isra.24 (libglib-2.0.so.0)#012#16 0x00007f6354d7b4f2 g_main_loop_run (libglib-2.0.so.0)#012#17 0x00007f6356058267 gtk_main (libgtk-x11-2.0.so.0)#012#18 0x000055bb4e386f58 main (xfce4-panel)#012#19 0x00007f6354464401 __libc_start_main (libc.so.6)#012#20 0x000055bb4e3870d9 _start (xfce4-panel)
Mar 21 14:39:36  dbus-daemon[8871]: [session uid=6105 pid=8869] Activating service name='org.gtk.vfs.GoaVolumeMonitor' requested by ':1.12' (uid=6105 pid=8946 comm="/usr/libexec/tracker-extract ")
dbus-daemon[8871]: [session uid=6105 pid=8869] Successfully activated service 'org.gtk.vfs.GoaVolumeMonitor'
kernel: xfce4-panel[9455]: segfault at 0 ip 00007f7b7ad2a6a7 sp 00007ffc5c899df8 error 4 in libX11-xcb.so.1.0.0[7f7b7ad2a000+1000]
systemd: Started Process Core Dump (PID 9495/UID 0).
systemd-coredump: Removed old coredump core.marco.1000.c2b3c76b5fd04c8f981c941d5266a42d.16081.1489583034000000000000.lz4.
systemd-coredump: Process 9455 (xfce4-panel) of user 6105 dumped core.#012#012Stack trace of thread 9455:#012#0  0x00007f7b7ad2a6a7 XGetXCBConnection (libX11-xcb.so.1)#012#1  0x00007f7b7f5a61b2 sn_display_new (libstartup-notification-1.so.0)#012#2  0x00007f7b82e5a67f wnck_screen_get (libwnck-1.so.22)#012#3  0x0000560d747b156a panel_window_screen_changed (xfce4-panel)#012#4  0x00007f7b8191e7fb g_type_create_instance (libgobject-2.0.so.0)#012#5  0x00007f7b8190069b g_object_new_internal (libgobject-2.0.so.0)#012#6  0x00007f7b819025ae g_object_new_valist (libgobject-2.0.so.0)#012#7  0x00007f7b81902851 g_object_new (libgobject-2.0.so.0)#012#8  0x0000560d747b3e38 panel_window_new (xfce4-panel)#012#9  0x0000560d747990b2 panel_application_new_window (xfce4-panel)#012#10 0x0000560d747993cc panel_application_load_real (xfce4-panel)#012#11 0x0000560d747997bc panel_application_wait_for_window_manager_destroyed (xfce4-panel)#012#12 0x00007f7b8161f938 g_source_callback_unref (libglib-2.0.so.0)#012#13 0x00007f7b81621106 g_source_destroy_internal (libglib-2.0.so.0)#012#14 0x00007f7b81622f00 g_main_context_dispatch (libglib-2.0.so.0)#012#15 0x00007f7b816231d0 g_main_context_iterate.isra.24 (libglib-2.0.so.0)#012#16 0x00007f7b816234f2 g_main_loop_run (libglib-2.0.so.0)#012#17 0x00007f7b82900267 gtk_main (libgtk-x11-2.0.so.0)#012#18 0x0000560d74796f58 main (xfce4-panel)#012#19 0x00007f7b80d0c401 __libc_start_main (libc.so.6)#012#20 0x0000560d747970d9 _start (xfce4-panel)

Comment 20 RobbieTheK 2017-03-21 18:50:49 UTC
Created attachment 1265190 [details]
core dump

Comment 21 Mukundan Ragavan 2017-03-21 21:22:47 UTC
Would you be able to file this upstream or would you prefer that I file it upstream?

Thanks!

Comment 22 RobbieTheK 2017-03-21 21:30:21 UTC
If you could do it I would appreciate it, thanks. I take it this is separate from the issue that was just fixed?

Comment 23 RobbieTheK 2017-03-21 21:30:35 UTC
If you could do it I would appreciate it, thanks. I take it this is separate from the issue that was just fixed?

Comment 24 Olivier Fourdan 2017-03-24 11:00:55 UTC
I am not convinced this is a bug in xfwm4, or xfce4-panel for that matter (as both are mentioned in this bug, comment 0 and comment 19). but I suspect they are both victims of the display vanishing under their feet at startup.

Reason I believe so is because xfwm4 or xfce4-panel crashing won't cause the session to terminate (comment 14) and also, both backtraces point toward the same code in libstartup-notification but from two different components and code paths...

So if the session terminates, it's most likely xfce4-session that either dies or failed to start.

Best way to tell is to create a customer session in x2goclient and run just a bare xterm (Session type: "Custom desktop", Command "/usr/bin/xterm" - just make sure you have xterm installed first...) and then run "startxfce4" from this xterm and see what it says.

Comment 25 RobbieTheK 2017-03-24 13:33:13 UTC
Yes "the display vanishing under their feet at startup" is exactly what happens. Here's what happends with startxfce, and I added --disable-wm-check but same results with and without that option.


startxfce4 --disable-wm-check
/bin/startxfce4: X server already running on display :58.0
xfce4-session-Message: SSH authentication agent is already running
gpg-agent[6002]: WARNING: "--write-env-file" is an obsolete option - it has no effect
gpg-agent: a gpg-agent is already running - not starting a new one

(xfce4-session:5998): xfce4-session-WARNING **: gpg-agent returned no PID in the variables

(xfce4-session:5998): xfce4-session-WARNING **: xfsm_manager_load_session: Something wrong with /.cache/sessions/xfce4-session-ourdomain:58, Does it exist? Permissions issue?

(xfwm4:6005): xfwm4-WARNING **: The display does not support the XComposite extension.

(xfwm4:6005): xfwm4-WARNING **: The display does not support the XFixes extension.
(xfwm4:6005): xfwm4-WARNING **: Compositing manager disabled.

(xfwm4:6005): xfwm4-WARNING **: Error opening /dev/dri/card0: Permission denied
vmware-user: could not open /proc/fs/vmblock/dev
SELinux Troubleshooter: Applet requires SELinux be enabled to run.
blueman-applet version 2.0.4 starting
Stale PID, overwriting
/usr/lib/python3.5/site-packages/blueman/plugins/applet/AppIndicator.py:8: PyGIWarning: AppIndicator3 was imported without specifying a version first. Use gi.require_version('AppIndicator3', '0.1') before import to ensure that the right version gets loaded.
  from gi.repository import AppIndiccator3 as girAppIndicator

Comment 26 Olivier Fourdan 2017-03-24 14:13:23 UTC
and then... "startxfce4" ends, just like that?

What if you run "xfwm4 & xfce4-panel" instead, do they start?

Comment 27 RobbieTheK 2017-03-24 15:50:51 UTC
"and then... "startxfce4" ends, just like that?"

Just these logs over & over:
xfce4-panel: No window manager registered on screen 0. To start the panel without this check, run with --disable-wm-check.

xfwm4 
(xfwm4:25954): xfwm4-WARNING **: The display does not support the XComposite extension.
(xfwm4:25954): xfwm4-WARNING **: The display does not support the XFixes extension.
(xfwm4:25954): xfwm4-WARNING **: Compositing manager disabled.
(xfwm4:25954): xfwm4-WARNING **: Error opening /dev/dri/card0: Permission denied
Segmentation fault (core dumped)

xfce4-panel
xfce4-panel: Failed to connect to session manager: Failed to connect to the session manager: SESSION_MANAGER environment variable not defined
xfce4-panel: No window manager registered on screen 0. To start the panel without this check, run with --disable-wm-check.
Segmentation fault (core dumped)

Would you like the core dumps?

Comment 28 Olivier Fourdan 2017-03-24 16:40:02 UTC
If, from the very same xterm session you run some other gtk2 based app, say "gtk-demo", does it work?

Comment 29 RobbieTheK 2017-03-24 16:49:46 UTC
After installing all the necessary packages for gtk-demo it starts and I see the "Application main window Demonstrates a typical application window with menubar, toolbar, statusbar."

Comment 30 RobbieTheK 2017-03-30 16:57:13 UTC
Any update on a fix or what the root of the problem is?

Comment 31 Olivier Fourdan 2017-04-07 06:48:49 UTC
Sorry, can't reproduce the issue, xfce works fine in x2go here between two different fedora 25 machines.

I would be interested in the xfwm4 core file...

Comment 32 RobbieTheK 2017-04-07 13:14:44 UTC
Created attachment 1269745 [details]
xfwm4 core file

xfwm4 core file attached I also have cores for marco, xfce4 and using openbox.

Comment 33 Olivier Fourdan 2017-04-07 16:02:18 UTC
(In reply to RobbieTheK from comment #32)
> xfwm4 core file attached I also have cores for marco, xfce4 and using
> openbox.

You mean you have all these (unrelated) apps segfaulting the same? That doesn't seem right...

Comment 34 Olivier Fourdan 2017-04-07 16:08:42 UTC
The backtrace seems odd, dpy->xcb is NULL but this is not something xfwm4 does by itself.

Why is that set in your env?

    LD_LIBRARY_PATH=/usr/lib64/nx/X11/Xinerama:/usr/lib64/nx/X11

Are you using x2go from Fedora 25 packages? Is there anything in those paths?

Does "unset LD_LIBRARY_PATH; xfwm4 --compositor=off" make any difference?

Comment 35 Olivier Fourdan 2017-04-07 16:15:16 UTC
Ah this is highly suspect to me:

From                To                  Syms Read   Shared Object Library
                                        No          /usr/lib64/nx/X11/libX11.so.6

So you're *not* using the libX11 from the OS/Fedora 25, and not too surprisingly, the crash occurs in the display structures...

I am quite convinced this is a issue in your environment, not using provided libraries.

Comment 36 RobbieTheK 2017-04-07 16:20:35 UTC
"Why is that set in your env?

    LD_LIBRARY_PATH=/usr/lib64/nx/X11/Xinerama:/usr/lib64/nx/X11"

Not sure?

"Does "unset LD_LIBRARY_PATH; xfwm4 --compositor=off" make any difference?"
 unset LD_LIBRARY_PATH; xfwm4 --compositor=off

(xfwm4:22503): Gtk-WARNING **: cannot open display:

"Are you using x2go from Fedora 25 packages?"

 dnf info libX11*
Last metadata expiration check: 0:53:26 ago on Fri Apr  7 11:25:27 2017.
Installed Packages
Name        : libX11
Arch        : i686
Epoch       : 0
Version     : 1.6.4
Release     : 4.fc25
Size        : 1.3 M
Repo        : @System
From repo   : updates
Summary     : Core X11 protocol client library
URL         : http://www.x.org
License     : MIT
Description : Core X11 protocol client library.

Name        : libX11
Arch        : x86_64
Epoch       : 0
Version     : 1.6.4
Release     : 4.fc25
Size        : 1.3 M
Repo        : @System
From repo   : updates
Summary     : Core X11 protocol client library
URL         : http://www.x.org
License     : MIT
Description : Core X11 protocol client library.

Name        : libX11-common
Arch        : noarch
Epoch       : 0
Version     : 1.6.4
Release     : 4.fc25
Size        : 1.3 M
Repo        : @System
From repo   : updates
Summary     : Common data for libX11
URL         : http://www.x.org
License     : MIT
Description : libX11 common data

Name        : libX11-devel
Arch        : x86_64
Epoch       : 0
Version     : 1.6.4
Release     : 4.fc25
Size        : 1.0 M
Repo        : @System
From repo   : updates
Summary     : Development files for libX11
URL         : http://www.x.org
License     : MIT
Description : X.Org X11 libX11 development package

Available Packages
Name        : libX11-devel
Arch        : i686
Epoch       : 0
Version     : 1.6.4
Release     : 4.fc25
Size        : 982 k
Repo        : updates
Summary     : Development files for libX11
URL         : http://www.x.org
License     : MIT
Description : X.Org X11 libX11 development package

Comment 37 RobbieTheK 2017-04-07 16:23:45 UTC
dnf info x2go*
Last metadata expiration check: 0:57:23 ago on Fri Apr  7 11:25:27 2017.
Installed Packages
Name        : x2goagent
Arch        : x86_64
Epoch       : 0
Version     : 3.5.0.32
Release     : 4.fc24
Size        : 37 k
Repo        : @System
From repo   : fedora
Summary     : X2Go Agent
URL         : http://x2go.org/
License     : GPLv2+
Description : X2Go agent functionality has been completely incorporated into
            : nxagent's code base. If the nxagent binary is executed under the name
            : of "x2goagent", the X2Go functionalities get activated.
            :
            : The x2goagent package is a wrapper that activates X2Go branding in
            : nxagent. Please refer to the nxagent package's description for more
            : information on NX.

Name        : x2goserver
Arch        : x86_64
Epoch       : 0
Version     : 4.0.1.20
Release     : 1.fc25
Size        : 309 k
Repo        : @System
From repo   : updates
Summary     : X2Go Server
URL         : http://www.x2go.org
License     : GPLv2+
Description : X2Go is a server based computing environment with
            :     - session resuming
            :     - low bandwidth support
            :     - session brokerage support
            :     - client side mass storage mounting support
            :     - audio support
            :     - authentication by smartcard and USB stick
            :
            : This package contains the main daemon and tools for X2Go server-side session
            : administrations.

Name        : x2goserver-xsession
Arch        : x86_64
Epoch       : 0
Version     : 4.0.1.20
Release     : 1.fc25
Size        : 8.7 k
Repo        : @System
From repo   : updates
Summary     : X2Go Server Xsession runner
URL         : http://www.x2go.org
License     : GPLv2+
Description : X2Go is a server based computing environment with
            :    - session resuming
            :    - low bandwidth support
            :    - session brokerage support
            :    - client side mass storage mounting support
            :    - audio support
            :    - authentication by smartcard and USB stick
            :
            : This X2Go server add-on enables Xsession script handling
            : when starting desktop sessions with X2Go.
            :
            : Amongst others the parsing of Xsession scripts will
            : enable desktop-profiles, ssh-agent startups, gpgagent
            : startups and many more Xsession related features on
            : X2Go session login automagically.

Comment 38 Olivier Fourdan 2017-04-07 16:29:11 UTC
That doesn't prove that the file comes from the packages :)

What gives:

  $ ls -l /usr/lib64/nx/X11/libX11.so.6
  $ rpm -qf /usr/lib64/nx/X11/libX11.so.6

On your system? (since that's the actual libX11 being loaded there)

As a comparison, I have here:

  $ ls /usr/lib64/nx/X11/libX11.so.6
  ls: cannot access '/usr/lib64/nx/X11/libX11.so.6': No such file or directory

  => So there is no such file on my system

But some of the directories do exist:

  $ ls /usr/lib64/nx/X11/
  Xinerama
  $ ls -l /usr/lib64/nx/X11/Xinerama/
  total 0
  lrwxrwxrwx. 1 root root 29 Feb 11 10:35 libNX_X11.so.6 -> ../../../../lib64/libX11.so.6
  lrwxrwxrwx. 1 root root 30 Feb 11 10:35 libNX_Xext.so.6 -> ../../../../lib64/libXext.so.6
  lrwxrwxrwx. 1 root root 25 Feb 11 10:35 libXinerama.so.1 -> ../../libNX_Xinerama.so.1

 => So those are supposed to be symlinks to the standard libs provided by Fedora. Is that the case on your system?

Comment 39 RobbieTheK 2017-04-07 16:35:28 UTC
ls -l /usr/lib64/nx/X11/libX11.so.6
lrwxrwxrwx 1 root root 20 Mar  8 21:35 /usr/lib64/nx/X11/libX11.so.6 -> ../../libNX_X11.so.6

rpm -qf /usr/lib64/nx/X11/libX11.so.6
nxagent-3.5.99.4-0.0build1.fc25.x86_64

ls /usr/lib64/nx/X11/
libNX_X11.so.6  libX11.so.6  libX11.so.6.2


ls -l /usr/lib64/nx/X11/Xinerama
ls: cannot access '/usr/lib64/nx/X11/Xinerama': No such file or directory


OK looks like at some point I enabled the copr repo from https://copr.fedorainfracloud.org/coprs/mikedep333/nx-libs-3.6/build/524054/

Should I remove those?

Comment 40 Olivier Fourdan 2017-04-07 16:47:57 UTC
That's completely up to you to decide, I don't know these builds... If I was me, I would stick to the builds provided by Fedora. Those work here.

All I know is that the core file shows the process is using a non-standard libX11 and the odd crash occurs in the display (created by libX11) and is affecting several different unrelated projects  - i.e. I am quite convinced this is not a bug in xfwm4.

Comment 41 RobbieTheK 2017-04-07 16:51:55 UTC
Created attachment 1269835 [details]
coredump

OK here's a coredump from a server that is not using the updated NX libs.

Comment 42 RobbieTheK 2017-04-07 16:53:16 UTC
And:
more core_backtrace
{   "signal": 11
,   "executable": "/usr/bin/xfdesktop"
,   "only_crash_thread": true
,   "stacktrace":
      [ {   "crash_thread": true
        ,   "frames":
              [ {   "address": 140025185842855
                ,   "build_id": "2cd49b4e4b0afdee8f342a7bd699e4656d95e0fc"
                ,   "build_id_offset": 1703
                ,   "function_name": "XGetXCBConnection"
                ,   "file_name": "/usr/lib64/libX11-xcb.so.1.0.0"
                }
              , {   "address": 140025263362482
                ,   "build_id": "774b2e67d0deb0d3f0a214b91e0aa68afd605fb6"
                ,   "build_id_offset": 12722
                ,   "function_name": "sn_display_new"
                ,   "file_name": "/usr/lib64/libstartup-notification-1.so.0.0.0"
                }
              , {   "address": 140025343317631
                ,   "build_id": "3de7365af2d70c17a8aec76de4283e7099f8d1da"
                ,   "build_id_offset": 83583
                ,   "function_name": "wnck_screen_get"
                ,   "file_name": "/usr/lib64/libwnck-1.so.22.4.0"
                }
              , {   "address": 94852561572451
                ,   "build_id": "1eb986ee199e86508279d2953d8f7b2c34220065"
                ,   "build_id_offset": 115299
                ,   "function_name": "xfce_desktop_realize"
                ,   "file_name": "/usr/bin/xfdesktop"
                }
              , {   "address": 140025286550501
                ,   "build_id": "8f0af3ac13665e292515639f3557b9f9c9b59b7c"
                ,   "build_id_offset": 62437
                ,   "function_name": "g_closure_invoke"
                ,   "file_name": "/usr/lib64/libgobject-2.0.so.0.5000.3"
                }
              , {   "address": 140025286622724
                ,   "build_id": "8f0af3ac13665e292515639f3557b9f9c9b59b7c"
                ,   "build_id_offset": 134660
                ,   "function_name": "signal_emit_unlocked_R"
                ,   "file_name": "/usr/lib64/libgobject-2.0.so.0.5000.3"
                }
              , {   "address": 140025286660191
                ,   "build_id": "8f0af3ac13665e292515639f3557b9f9c9b59b7c"
                ,   "build_id_offset": 172127
                ,   "function_name": "g_signal_emit_valist"
                ,   "file_name": "/usr/lib64/libgobject-2.0.so.0.5000.3"
                }
              , {   "address": 140025286661183
                ,   "build_id": "8f0af3ac13665e292515639f3557b9f9c9b59b7c"
                ,   "build_id_offset": 173119
                ,   "function_name": "g_signal_emit"
                ,   "file_name": "/usr/lib64/libgobject-2.0.so.0.5000.3"
                }
              , {   "address": 140025322594292
                ,   "build_id": "83b153c37b177bbcfcab011672f28fba50de4e44"
                ,   "build_id_offset": 2596852
                ,   "function_name": "gtk_widget_realize"
                ,   "file_name": "/usr/lib64/libgtk-x11-2.0.so.0.2400.31"
                }
              , {   "address": 94852561583245
                ,   "build_id": "1eb986ee199e86508279d2953d8f7b2c34220065"
                ,   "build_id_offset": 126093
                ,   "function_name": "xfdesktop_application_start"
                ,   "file_name": "/usr/bin/xfdesktop"
                }
              , {   "address": 94852561584314
                ,   "build_id": "1eb986ee199e86508279d2953d8f7b2c34220065"
                ,   "build_id_offset": 127162
                ,   "function_name": "cb_wait_for_window_manager_destroyed"
                ,   "file_name": "/usr/bin/xfdesktop"
                }
              , {   "address": 140025283553592
                ,   "build_id": "3b5186f89b9971902d8124e8eee90486b1e569de"
                ,   "build_id_offset": 289080
                ,   "function_name": "g_source_callback_unref"
                ,   "file_name": "/usr/lib64/libglib-2.0.so.0.5000.3"
                }
              , {   "address": 140025283559686
                ,   "build_id": "3b5186f89b9971902d8124e8eee90486b1e569de"
                ,   "build_id_offset": 295174
                ,   "function_name": "g_source_destroy_internal"
                ,   "file_name": "/usr/lib64/libglib-2.0.so.0.5000.3"
                }
              , {   "address": 140025283567360
                ,   "build_id": "3b5186f89b9971902d8124e8eee90486b1e569de"
                ,   "build_id_offset": 302848
                ,   "function_name": "g_main_context_dispatch"
                ,   "file_name": "/usr/lib64/libglib-2.0.so.0.5000.3"
                }
              , {   "address": 140025283568080
                ,   "build_id": "3b5186f89b9971902d8124e8eee90486b1e569de"
                ,   "build_id_offset": 303568
                ,   "function_name": "g_main_context_iterate.isra.24"
                ,   "file_name": "/usr/lib64/libglib-2.0.so.0.5000.3"
                }
              , {   "address": 140025283568252
                ,   "build_id": "3b5186f89b9971902d8124e8eee90486b1e569de"
                ,   "build_id_offset": 303740
                ,   "function_name": "g_main_context_iteration"
                ,   "file_name": "/usr/lib64/libglib-2.0.so.0.5000.3"
                }
              , {   "address": 140025294273437
                ,   "build_id": "48ad6b28698fcd7a879b133df3563a164f8d51d7"
                ,   "build_id_offset": 646045
                ,   "function_name": "g_application_run"
                ,   "file_name": "/usr/lib64/libgio-2.0.so.0.5000.3"
                }
              , {   "address": 94852561539517
                ,   "build_id": "1eb986ee199e86508279d2953d8f7b2c34220065"
                ,   "build_id_offset": 82365
                ,   "function_name": "main"
                ,   "file_name": "/usr/bin/xfdesktop"
                } ]
        } ]
}

Comment 43 Michael DePaulo 2017-04-08 12:34:44 UTC
I am the maintainer of that copr repo.

This bug only occurs with nx-libs 3.6 (in beta), not nx-libs 3.5, which is in all Fedora and EPEL releases.

I have submitted it upstream.
https://github.com/ArcticaProject/nx-libs/issues/420

Comment 44 Fedora Update System 2017-04-10 15:59:35 UTC
xfwm4-4.12.4-1.fc26 has been pushed to the Fedora 26 stable repository. If problems still persist, please make note of it in this bug report.

Comment 45 Fedora Update System 2017-04-27 05:50:50 UTC
xfwm4-4.12.4-1.fc25 has been pushed to the Fedora 25 stable repository. If problems still persist, please make note of it in this bug report.

Comment 46 RobbieTheK 2017-05-12 15:32:28 UTC
Similar problem has been detected:

using X2Go with XFCE

reporter:       libreport-2.8.0
backtrace_rating: 4
cmdline:        xfwm4
crash_function: XGetXCBConnection
executable:     /usr/bin/xfwm4
global_pid:     24707
kernel:         4.10.8-200.fc25.x86_64
package:        xfwm4-4.12.4-1.fc25
pkg_fingerprint: 4089 D8F2 FDB1 9C98
pkg_vendor:     Fedora Project
reason:         xfwm4 killed by SIGSEGV
runlevel:       N 5
type:           CCpp
uid:            6105

Comment 47 Olivier Fourdan 2017-05-12 15:36:51 UTC
(In reply to RobbieTheK from comment #46)
> Similar problem has been detected:
> 
> using X2Go with XFCE

This a problem with x2go, not xfwm4.

Comment 48 RobbieTheK 2017-05-12 17:21:13 UTC
(In reply to Olivier Fourdan from comment #47)
> (In reply to RobbieTheK from comment #46)
> > Similar problem has been detected:
> > 
> > using X2Go with XFCE
> 
> This a problem with x2go, not xfwm4.

Can you change this to an Fedora-X2Go bug and reassign?

Comment 49 RobbieTheK 2017-05-13 21:29:06 UTC
Seeing this error:
TRACE[xfsm-manager.c:1295] xfsm_manager_save_yourself_done(): enteringTRACE[ice-layer.c:99] ice_error_handler(): ICE connection fd = 20, ICE I/O error on connection

Comment 50 Orion Poplawski 2017-05-15 21:30:48 UTC
*** Bug 1433419 has been marked as a duplicate of this bug. ***

Comment 51 Orion Poplawski 2017-05-15 21:30:52 UTC
*** Bug 1433449 has been marked as a duplicate of this bug. ***

Comment 52 Orion Poplawski 2017-05-15 21:31:16 UTC
*** Bug 1435677 has been marked as a duplicate of this bug. ***

Comment 53 Orion Poplawski 2017-05-15 21:33:55 UTC
As indicated in https://github.com/ArcticaProject/nx-libs/issues/420 this generally is a mismatch between x2goserver and nx-libs versions.  Robbie - are you sure you can reproduce with a stock Fedora install?

Comment 54 RobbieTheK 2017-05-19 18:56:11 UTC
(In reply to Orion Poplawski from comment #53)
> As indicated in https://github.com/ArcticaProject/nx-libs/issues/420 this
> generally is a mismatch between x2goserver and nx-libs versions.  Robbie -
> are you sure you can reproduce with a stock Fedora install?

This only happens to one NIS user. I upgraded X2Goserver to 4.1 and same--keeps getting a protocol mismatch error. I deleted both ~/.config/xfce4  & ~/.ICEauthority and same. MATE crashes as well.

Comment 55 Orion Poplawski 2017-05-24 21:51:54 UTC
I think you're going to need to figure out what it different in the user's environment.

Comment 56 RobbieTheK 2017-05-29 18:27:44 UTC
(In reply to Orion Poplawski from comment #55)
> I think you're going to need to figure out what it different in the user's
> environment.

What preferences/files should I be looking in?

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