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How can traditional VNC server in Debian 12 VM coexist with noVNC VM console?

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This post explains  some about how the VM VNC Console works.

The lack of clipboard support and unavailability from the network outside of the Unraid server makes it unusable for remote access except for basic configuration. In the thread, @jonpsays "Just an FYI, you could install a VNC server inside the VM and then copy/paste would work fine."

 

I followed this guide to install VNC server on my Debian 12 VM

 

Install appears to work as expected. However when the server runs, it starts and then shuts down immediately.


 

$ cat /home/tim/.vnc/sun-debian:2.log

Xvnc TigerVNC 1.12.0 - built 2023-01-06 16:01
Copyright (C) 1999-2021 TigerVNC Team and many others (see README.rst)
See https://www.tigervnc.org for information on TigerVNC.
Underlying X server release 12101006, X.Org

Thu Apr 24 08:04:53 2025
 vncext:      VNC extension running!
 vncext:      Listening for VNC connections on local interface(s), port 5902
 vncext:      created VNC server for screen 0
[mi] mieq: warning: overriding existing handler (nil) with 0x557f0ec9c180 for event 2
[mi] mieq: warning: overriding existing handler (nil) with 0x557f0ec9c180 for event 3
3NI3X0 New Xtigervnc server 'sun-debian:2 (tim)' on port 5902 for display :2.
3NI3X0 Use xtigervncviewer -SecurityTypes VncAuth -passwd /tmp/tigervnc.QdAHyv/passwd :2 to connect to the VNC server.
Terminated
X connection to :2 broken (explicit kill or server shutdown).
 ComparingUpdateTracker: 0 pixels in / 0 pixels out
 ComparingUpdateTracker: (1:-nan ratio)
Killing Xtigervnc process ID 2054... success!
tim@sun-debian:~$

 

 

Is the noVNC service killing my vncserver? How can I make them coexist?


 

Edited by timg11

  • 1 month later...
  • Community Expert
On 4/24/2025 at 2:45 PM, timg11 said:

This post explains  some about how the VM VNC Console works.

The lack of clipboard support and unavailability from the network outside of the Unraid server makes it unusable for remote access except for basic configuration. In the thread, @jonpsays "Just an FYI, you could install a VNC server inside the VM and then copy/paste would work fine."

 

I followed this guide to install VNC server on my Debian 12 VM

 

Install appears to work as expected. However when the server runs, it starts and then shuts down immediately.


 

$ cat /home/tim/.vnc/sun-debian:2.log

Xvnc TigerVNC 1.12.0 - built 2023-01-06 16:01
Copyright (C) 1999-2021 TigerVNC Team and many others (see README.rst)
See https://www.tigervnc.org for information on TigerVNC.
Underlying X server release 12101006, X.Org

Thu Apr 24 08:04:53 2025
 vncext:      VNC extension running!
 vncext:      Listening for VNC connections on local interface(s), port 5902
 vncext:      created VNC server for screen 0
[mi] mieq: warning: overriding existing handler (nil) with 0x557f0ec9c180 for event 2
[mi] mieq: warning: overriding existing handler (nil) with 0x557f0ec9c180 for event 3
3NI3X0 New Xtigervnc server 'sun-debian:2 (tim)' on port 5902 for display :2.
3NI3X0 Use xtigervncviewer -SecurityTypes VncAuth -passwd /tmp/tigervnc.QdAHyv/passwd :2 to connect to the VNC server.
Terminated
X connection to :2 broken (explicit kill or server shutdown).
 ComparingUpdateTracker: 0 pixels in / 0 pixels out
 ComparingUpdateTracker: (1:-nan ratio)
Killing Xtigervnc process ID 2054... success!
tim@sun-debian:~$

 

 

Is the noVNC service killing my vncserver? How can I make them coexist?


 

Copy and paste needs to be enabled and you also need to load vdagent from spice. novnc from the console does not install anything on the VM so installing a servers should be ok.

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