TigerVNC server not installed error with medley -v + on Raspberry Pi

[pamoroso]

On my Raspberry Pi 400 running 64-bit Raspberry Pi OS (Debian Bookworm 12.7) I used Clang to build Medley X11 from the latest sources. When I launch Medley with the -v + option I get this error (BTW the error has a typo: that that):

pi@raspberrypi:~ $ medley -a -e -n -v +
Error: The -v or --vnc flag was set.
But it appears that that TigerVNC server \(Xvnc\) has not been installed.
Please install the TigerVNC server and try again.  On Debian and Ubuntu, use:
"sudo apt install tigervnc-standalone-server". On most other Linux distros, use the
distro's package manager to install the "tigervnc-server" package.
Exiting.

All the required TigerVNC components are installed (installato: installed):

pi@raspberrypi:~ $ apt list tigervnc* 
Elencazione... Fatto
tigervnc-common/stable,now 1.12.0+dfsg-8 arm64 [installato, automatico]
tigervnc-common/stable 1.12.0+dfsg-8 armhf
tigervnc-scraping-server/stable 1.12.0+dfsg-8 arm64
tigervnc-scraping-server/stable 1.12.0+dfsg-8 armhf
tigervnc-standalone-server/stable,now 1.12.0+dfsg-8 arm64 [installato]
tigervnc-standalone-server/stable 1.12.0+dfsg-8 armhf
tigervnc-tools/stable,now 1.12.0+dfsg-8 arm64 [installato, automatico]
tigervnc-tools/stable 1.12.0+dfsg-8 armhf
tigervnc-viewer/stable,now 1.12.0+dfsg-8 arm64 [installato]
tigervnc-viewer/stable 1.12.0+dfsg-8 armhf
tigervnc-xorg-extension/stable,now 1.12.0+dfsg-8 arm64 [installato]
tigervnc-xorg-extension/stable 1.12.0+dfsg-8 armhf
pi@raspberrypi:~ $ vnc
vncagent                vncpamhelper            vncserver-x11
vncconfig               vncpasswd               vncserver-x11-core
vncfopshelper           vncserver               vncserver-x11-serviced
vncinitconfig           vncserverui             vncsession
vnclicense              vncserver-virtual       vncviewer
vnclicensewiz           vncserver-virtuald      

However, no Xvnc program is in the executable path.

[fghalasz]

Are you running X11 or Wayland?

What does which Xvnc return?

How about which Xtigervnc?

How did you install tigervnc - using apt-get or was it already installed as part of the RpiOS?

[pamoroso]

I'm running Wayland which is now the default on Raspberry Pi OS. To install TigerVNC I used the software manager GUI tool that comes with Pi OS: I just marked the relevant packages and activated the installation.

I was wrong about Xvnc not being in the path, here's the output of which:

pi@raspberrypi:~ $ which Xvnc
/usr/bin/Xvnc
pi@raspberrypi:~ $ which Xtigervnc
/usr/bin/Xtigervnc
pi@raspberrypi:~ $ Xvnc
Xvnc       Xvnc-core  

medley_vnc.sh calls Xvnc with the -version option which the Pi OS Xvnc doesn't recognize. Executing Xvnc -version yields the error Unrecognized option: -version and outputs a very long notice of which this is the relevant part: xvnc-output.txt

However, Xtigervnc does accept the -version option:

pi@raspberrypi:~ $ Xtigervnc -version

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

[fghalasz]

@pamoroso Could you let me know what the following return on your RPi:
which xtigervncviewer
which tigervncviewer
ls -l /etc/alternatives/vncviewer

[pamoroso]

This is the output of the commands:

pi@raspberrypi:~ $ which xtigervncviewer
/usr/bin/xtigervncviewer
pi@raspberrypi:~ $ which tigervncviewer
pi@raspberrypi:~ $ ls -l /etc/alternatives/vncviewer
lrwxrwxrwx 1 root root 24  6 gen  2023 /etc/alternatives/vncviewer -> /usr/bin/xtigervncviewer

/usr/bin/xtigervncviewer is not a symlink. which tigervncviewer returns nothing.

[fghalasz]

@pamoroso Thanks. I submitted PR #1842 to fix this. Try it out and see if it works for you.

[pamoroso]

I applied the patch but this somehow messed with my Medley installation and I can no longer run it. So I need to do some Medley troubleshooting before trying VNC.

In medley/scripts/medley/ I renamed medley.command and medley_vnc.sh, downloaded the versions from the patch, and set the x permission of both scripts. When I ran Medley I got this error:

pi@raspberrypi:~ $ medley -a -e -n -v +
Warning: The -v or --vnc flag was set.
But the vnc option is only available when running on 
Windows System for Linux (wsl) on x86_64 machines.
Ignoring the -v or --vnc flag.

Error: only one sysout can be specified.  Two or more sysouts were speci
fied
via the -l (--lisp), -f (--full), -a (--apps) flags and/or a sysout file
name

I realized the system still had a .deb Medley package and uninstalled it but now I get this puzzling error when launching Medley (File o directory non esistente: unknown file or directory):

pi@raspberrypi:~/medley/medley/scripts/medley $ medley -a -e -n -v +
bash: /usr/local/bin/medley: File o directory non esistente

This is the content of medley/scripts/medley:

pi@raspberrypi:~/medley/medley/scripts/medley $ ls -l
totale 200
-rwxr-xr-x 1 pi pi   132 29 set 17.19 compile.sh
-rwxr-xr-x 1 pi pi 11850 29 set 17.19 inline.sh
-rwxr-xr-x 1 pi pi  9326 29 set 17.19 medley_args.sh
-rw-r--r-- 1 pi pi    36  9 nov  2023 medley.cmd
-rwxr-xr-x 1 pi pi 45956  1 ott 11.32 medley.command
-rwxr-xr-x 1 pi pi 46076 29 set 17.19 medley.command.old
-rw-r--r-- 1 pi pi  2087 29 set 17.19 medley_configfile.sh
-rwxr-xr-x 1 pi pi  2236 29 set 17.19 medley_geometry.sh
-rw-r--r-- 1 pi pi  1378 29 set 17.19 medley_header.sh
-rwxr-xr-x 1 pi pi  7107 29 set 17.19 medley_main.sh
-rwxr-xr-x 1 pi pi 12003  9 nov  2023 medley.ps1
-rw-r--r-- 1 pi pi  8822 29 set 17.19 medley_run.sh
lrwxrwxrwx 1 pi pi    14  9 nov  2023 medley.sh -> medley.command
-rw-r--r-- 1 pi pi  4012 29 set 17.19 medley_usage.sh
-rw-r--r-- 1 pi pi  4095 29 set 17.19 medley_utils.sh
-rwxr-xr-x 1 pi pi  7045  1 ott 11.32 medley_vnc.sh
-rwxr-xr-x 1 pi pi  7165 29 set 17.19 medley_vnc.sh.old
-rw-r--r-- 1 pi pi   273 29 set 17.19 README

I need to figure out why the scripts are calling /usr/local/bin/medley (no longer installed) and what went wrong.

[fghalasz]

Try executing medley using ./medley rather than just medley while connected to your top level medley directory, which looks like it is ~/medley/medley. This way any medley commands on your path will be ignored.

Also, not that it matters in this case, but you don't need to copy over medley_vnc.sh. All of the medley_*.sh files are compiled into a single bash script called medley.command (aka medley.sh). The compile.sh script does this compilation.

[pamoroso]

Okay, I'll try. Do I need to rebuild Medley after saving the two modified files? I just copied the files to the proper directory.

[pamoroso]

Executing medley using ./medley while connected to the top level directory works and Medley runs. But when I launch it with the VNC option I get this error:

pi@raspberrypi:~/medley/medley $ ./medley -a -e -n -v +
Using DISPLAY=:1
Using VNC_PORT=5901
"/home/pi/medley/medley/../maiko/linux.aarch64/lde" "/home/pi/medley/medley/loadups/apps.sysout" -id "default" -title "Medley Interlisp " -g 1440x900 -sc 1440x900 -noscroll
MEDLEYDIR: "/home/pi/medley/medley"
LOGINDIR: "/home/pi/il"
GREET FILE: "/home/pi/medley/medley/greetfiles/APPS-INIT.LCOM"
VMEM FILE: "/home/pi/il/vmem/lisp.virtualmem"
Unable to open X11 display from DISPLAY
vncconfig: unable to open display ":1"

and this dialog box with an error (connessione rifiutata: connection refused):

VNC is enabled in the system settings and, as far as I know, no firewall is active.