TigerVNC issues since switching from CentOS 7 to Red Hat 7.9

[Rob Morin (TheLoungeSound)]

Hello all...

I have this weird issue with TigerVNC Server , I am running version 1.8 via yum install.

Some users are reporting that TigerVNC runs on some servers and not others, when all are Red Hat 7.9

One user reports all is well on one server but can't connect to another server running same version of tigervnc and same version of tigervnc client in Windows 11.

With the main error just being black screen no mouse cursor.

When all servers were CentOS all was fine as I upgraded each server to Red Hat, weird issues have appeared, with nothing concrete.

One thing to mention that might affect the new Red Hat install with TigerVNC, is that we use NFS shared /home dirs  from one NFS server, then mounted on a dozen Red Hat servers.

Any help appreciated

Have a great day!

[Pierre Ossman]

On 14/11/2022 21:18, Rob Morin (TheLoungeSound) wrote:
>
> With the main error just being black screen no mouse cursor.
>

Unfortunately, that usually means TigerVNC started just fine, but your
desktop environment didn't. So it might be outside of our expertise.

What does the log file in ~/.vnc say? And have you checked if you have
any errors in the journal for the affected users?

> One thing to mention that might affect the new Red Hat install with
> TigerVNC, is that we use NFS shared /home dirs from one NFS server, then
> mounted on a dozen Red Hat servers.

Starting multiple copies of applications and desktop environments with
the same shared home directory is typically not supported and could
explain the issues you are experiencing.

Regards
--
Pierre Ossman Software Development
Cendio AB https://cendio.com
Teknikringen 8 https://twitter.com/ThinLinc
583 30 Linköping https://facebook.com/ThinLinc
Phone: +46-13-214600

A: Because it messes up the order in which people normally read text.
Q: Why is top-posting such a bad thing?

[Brian Hinz]

>> One thing to mention that might affect the new Red Hat install with
>> TigerVNC, is that we use NFS shared /home dirs  from one NFS server, then
>> mounted on a dozen Red Hat servers.
>
>Starting multiple copies of applications and desktop environments with
>the same shared home directory is typically not supported and could
>explain the issues you are experiencing.

Are you mounting /home statically?  If /home/<sid> is being mounted dynamically via automounter, etc then that's likely the culprit because Xvnc might be starting up before the user's homedir is mounted

[Rob Morin (TheLoungeSound)]

Thanks for the replies.

The /home is static.

As for the log file here is the latest output of this person's last vnc attempt.

Mon Nov 14 14:57:06 2022
 Connections: closed: 192.168.3.5::49695 (Clean disconnection)
 EncodeManager: Framebuffer updates: 2
 EncodeManager:   Tight:
 EncodeManager:     Solid: 2 rects, 1.50426 Mpixels
 EncodeManager:            32 B (1:188033 ratio)
 EncodeManager:   Total: 2 rects, 1.50426 Mpixels
 EncodeManager:          32 B (1:188033 ratio)
 TLS:         TLS session wasn't terminated gracefully
 ComparingUpdateTracker: 0 pixels in / 0 pixels out
 ComparingUpdateTracker: (1:-nan ratio)

The Journal for the affected user shows the below:

Nov 14 14:52:25 hanson.DOMAIN.com org.a11y.Bus[22799]: Activating service name='org.a11y.atspi.Registry'
Nov 14 14:52:25 hanson.DOMAIN.com org.a11y.Bus[22799]: Successfully activated service 'org.a11y.atspi.Registry'
Nov 14 14:52:25 hanson.DOMAIN.com org.a11y.atspi.Registry[22917]: SpiRegistry daemon is running with well-known name - org.a11y.atspi.Registry
Nov 14 14:52:26 hanson.DOMAIN.com gnome-session[22789]: gnome-session-binary[22789]: ERROR: Failed to connect to system bus: Exhausted all available authentication mechanisms (tried: EXTERNAL, DBUS_COOKIE_
Nov 14 14:52:26 hanson.DOMAIN.com gnome-session[22789]: aborting...
Nov 14 14:52:26 hanson.DOMAIN.com gnome-session-binary[22789]: ERROR: Failed to connect to system bus: Exhausted all available authentication mechanisms (tried: EXTERNAL, DBUS_COOKIE_SHA1, ANONYMOUS) (avai
                                                                aborting...
Nov 14 14:54:44 hanson.DOMAIN.com org.a11y.atspi.Registry[22917]: X connection to :3 broken (explicit kill or server shutdown).
Nov 14 14:54:44 hanson.DOMAIN.com com.redhat.imsettings[22799]: [ 1668455684.994003]: IMSettings-Daemon[22836]: INFO: Release the ownership of com.redhat.imsettings
Nov 14 14:54:44 hanson.DOMAIN.com org.gtk.vfs.Daemon[22799]: A connection to the bus can't be made
Nov 14 14:54:44 hanson.DOMAIN.com com.redhat.imsettings[22799]: Exiting...
Nov 14 14:54:44 hanson.DOMAIN.com com.redhat.imsettings[22799]: [ 1668455684.996178]: GLib-GIO[22836]: CRITICAL **: Error while sending AddMatch() message: The connection is closed
Nov 14 14:54:45 hanson.DOMAIN.com com.redhat.imsettings[22799]: [ 1668455685.002173]: GLib-GIO[22836]: CRITICAL **: Error while sending AddMatch() message: The connection is closed
Nov 14 14:54:45 hanson.DOMAIN.com com.redhat.imsettings[22799]: [ 1668455685.003314]: IMSettings-Daemon[22836]: INFO: Unloading imesttings module: gsettings
Nov 14 14:54:45 hanson.DOMAIN.com com.redhat.imsettings[22799]: [ 1668455685.004464]: IMSettings-Daemon[22836]: INFO: imsettings-daemon is shut down.
Nov 14 14:55:56 hanson.DOMAIN.com com.redhat.imsettings[23252]: [ 1668455756.351812]: IMSettings-Daemon[23289]: INFO: Starting imsettings-daemon...
Nov 14 14:55:56 hanson.DOMAIN.com com.redhat.imsettings[23252]: [ 1668455756.353025]: IMSettings-Daemon[23289]: INFO:   [HOME=/home/THE_USERNAME/.config/imsettings]
Nov 14 14:55:56 hanson.DOMAIN.com com.redhat.imsettings[23252]: [ 1668455756.354000]: IMSettings-Daemon[23289]: INFO:   [XINPUTRCDIR=/etc/X11/xinit/]
Nov 14 14:55:56 hanson.DOMAIN.com com.redhat.imsettings[23252]: [ 1668455756.357512]: IMSettings-Daemon[23289]: INFO:   [XINPUTDIR=/etc/X11/xinit/xinput.d/]
Nov 14 14:55:56 hanson.DOMAIN.com com.redhat.imsettings[23252]: [ 1668455756.359324]: IMSettings-Daemon[23289]: INFO:   [MODULEDIR=/usr/lib64/imsettings]
Nov 14 14:55:56 hanson.DOMAIN.com com.redhat.imsettings[23252]: [ 1668455756.360616]: IMSettings-Daemon[23289]: INFO:   [MODULES=gsettings]
Nov 14 14:55:56 hanson.DOMAIN.com org.a11y.Bus[23252]: Activating service name='org.a11y.atspi.Registry'
Nov 14 14:55:56 hanson.DOMAIN.com org.a11y.Bus[23252]: Successfully activated service 'org.a11y.atspi.Registry'
Nov 14 14:55:56 hanson.DOMAIN.com org.a11y.atspi.Registry[23370]: SpiRegistry daemon is running with well-known name - org.a11y.atspi.Registry
Nov 14 14:55:56 hanson.DOMAIN.com gnome-session[23242]: gnome-session-binary[23242]: ERROR: Failed to connect to system bus: Exhausted all available authentication mechanisms (tried: EXTERNAL, DBUS_COOKIE_
Nov 14 14:55:56 hanson.DOMAIN.com gnome-session[23242]: aborting...
Nov 14 14:55:56 hanson.DOMAIN.com gnome-session-binary[23242]: ERROR: Failed to connect to system bus: Exhausted all available authentication mechanisms (tried: EXTERNAL, DBUS_COOKIE_SHA1, ANONYMOUS) (avai
                                                                aborting...
Nov 14 14:57:09 hanson.DOMAIN.com org.a11y.atspi.Registry[23370]: X connection to :3 broken (explicit kill or server shutdown).
Nov 14 14:57:09 hanson.DOMAIN.com com.redhat.imsettings[23252]: [ 1668455829.699282]: IMSettings-Daemon[23289]: INFO: Release the ownership of com.redhat.imsettings
Nov 14 14:57:09 hanson.DOMAIN.com org.gtk.vfs.Daemon[23252]: A connection to the bus can't be made
Nov 14 14:57:09 hanson.DOMAIN.com com.redhat.imsettings[23252]: Exiting...
Nov 14 14:57:09 hanson.DOMAIN.com com.redhat.imsettings[23252]: [ 1668455829.701395]: GLib-GIO[23289]: CRITICAL **: Error while sending AddMatch() message: The connection is closed
Nov 14 14:57:09 hanson.DOMAIN.com com.redhat.imsettings[23252]: [ 1668455829.704093]: GLib-GIO[23289]: CRITICAL **: Error while sending AddMatch() message: The connection is closed
Nov 14 14:57:09 hanson.DOMAIN.com com.redhat.imsettings[23252]: [ 1668455829.704976]: IMSettings-Daemon[23289]: INFO: Unloading imesttings module: gsettings
Nov 14 14:57:09 hanson.DOMAIN.com com.redhat.imsettings[23252]: [ 1668455829.705857]: IMSettings-Daemon[23289]: INFO: imsettings-daemon is shut down.

Thanks and have a great day!

[Brian Hinz]

This appears to be identical to #1530

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[Rob Morin (TheLoungeSound)]

I see that bug report no..... , so I attempt to try to install 1.12, but seems more difficult than expected.

To compile from source, missing many packages, and when installing binaries, same thing lots of conflicts.

Has anyone ever installed 1,12 on Red Hat 7.9?

:)

Have a great day!

[Brian Hinz]

> Has anyone ever installed 1,12 on Red Hat 7.9?

 

Absolutely.  In my case we're running 1.12 on CentOS 7.9 (and a few RH EL7 boxes), with NFS mounted home dirs but we're using Centrify for integration with AD rather than LDAP.

There are rpms you can try either from our github release page or nightly builds linked off the tigervnc.org page.

To view this discussion on the web visit https://groups.google.com/d/msgid/tigervnc-users/63326ffd-bd18-4401-b0f0-373465a027c5n%40googlegroups.com.

[Rob Morin (TheLoungeSound)]

SO do i need to uninstall the current version of tiger vnc as i get this error

warning: tigervnc-server-1.12.0-1.el7.x86_64.rpm: Header V4 RSA/SHA1 Signature, key ID 4582a460: NOKEY
error: Failed dependencies:
        tigervnc-selinux = 1.12.0-1.el7 is needed by tigervnc-server-1.12.0-1.el7.x86_64
        tigervnc-server-minimal = 1.12.0-1.el7 is needed by tigervnc-server-1.12.0-1.el7.x86_64

And when I try to uninstall tigervnc-server-minimal

I get the below, do i say yes?

Dependencies Resolved

==============================================================================================================================================================================================================
 Package                                                              Arch                               Version                                        Repository                                       Size
==============================================================================================================================================================================================================
Removing:
 tigervnc-server-minimal                                              x86_64                             1.8.0-22.el7                                   @rhel-7-server-rpms                             2.5 M
Removing for dependencies:
 anaconda-gui                                                         x86_64                             21.48.22.159-1.el7                             @rhel-7-server-rpms                             1.5 M
 initial-setup-gui                                                    x86_64                             0.3.9.45-1.el7                                 @rhel-7-server-rpms                              32 k
 subscription-manager-initial-setup-addon                             x86_64                             1.24.51-1.el7_9                                @rhel-7-server-rpms                              47 k
 tigervnc-server                                                      x86_64                             1.8.0-22.el7                                   @rhel-7-server-rpms                             498 k

Transaction Summary
==============================================================================================================================================================================================================
Remove  1 Package (+4 Dependent packages)

Thanks for the help so far!

[Brian Hinz]

I think you can just can grab the rpms that you want to upgrade to, along with the rpm for tigervnc-selinux, put them all in a clean directory somewhere and then use “yum localinstall ./tigervnc*.rpm” and it should do the in-place upgrade.

To view this discussion on the web visit https://groups.google.com/d/msgid/tigervnc-users/6427f3cb-b8e1-44bf-83de-1a8f87e7ebcbn%40googlegroups.com.

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[Rob Morin (TheLoungeSound)]

Hey Brian, i just did that :0)

Everything got installed....

So i guess now i need to start via systemd now?

Thanks for your help!

[Rob Morin (TheLoungeSound)]

So Now I get this error :(

 gnome-session: gnome-session-binary[12068]: ERROR: Failed to connect to system bus: Exhausted all available authentication mechanisms

I am used realm to connect to AD, all works great for other services. Not even sure if that is an issue?

Have a great day!

[Rob Morin (TheLoungeSound)]

So FYI, if i switch to Xfce all works fine! Now just have to figure out how to use the 2 of them if either is not available.

Thanks and have a great day!