XIput extension missing

Dear All,

I am trying to resolve this issue for while but I haven't been able to
find anything to solve it.

Since the upgrade of my OS from Debian Bullseye to Bookworm the
screensaver and any kind of screen lockers stopped to work:

```
xscreensaver --no-splash
xscreensaver: 11:21:07: XInput extension missing

xtrlock -b
xtrlock (version 2.15): No X Input extension
```

I connect from windows to a Linux host.
The version of the server in use:

```
TightVNC Server version 1.3.10
```

This is how tightvnc server is launched:

```
USER="freezr" vncserver -nolisten tcp -geometry 1440x900 :1
```

This how is launched the window manager:

```
cat .vnc/xstartup
#!/bin/sh

# Load X resources (if any)
if [ -e "$HOME/.Xresources" ]
then
        xrdb "$HOME/.Xresources"
fi

#
xsetroot -solid black
xmodmap -e "keysym Alt_L = Multi_key" &
x-terminal-emulator -geometry "80x24+10+10" -ls -title "$VNCDESKTOP
Desktop" &
x-window-manager &
```

The list of relevant packages installed:
```
libx11-xcb1/stable-security,now 2:1.8.4-2+deb12u2 arm64
[installed,automatic]
libxcb-composite0/stable,now 1.15-1 arm64 [installed]
libxcb-damage0/stable,now 1.15-1 arm64 [installed,automatic]
libxcb-dri2-0/stable,now 1.15-1 arm64 [installed,automatic]
libxcb-dri3-0/stable,now 1.15-1 arm64 [installed,automatic]
libxcb-glx0/stable,now 1.15-1 arm64 [installed,automatic]
libxcb-icccm4/stable,now 0.4.1-1.1 arm64 [installed,automatic]
libxcb-image0/stable,now 0.4.0-2 arm64 [installed,automatic]
libxcb-keysyms1/stable,now 0.4.0-1+b2 arm64 [installed,automatic]
libxcb-present0/stable,now 1.15-1 arm64 [installed,automatic]
libxcb-randr0/stable,now 1.15-1 arm64 [installed,automatic]
libxcb-render-util0/stable,now 0.3.9-1+b1 arm64 [installed,automatic]
libxcb-render0-dev/stable,now 1.15-1 arm64 [installed]
libxcb-render0/stable,now 1.15-1 arm64 [installed,automatic]
libxcb-screensaver0/stable,now 1.15-1 arm64 [installed]
libxcb-shape0/stable,now 1.15-1 arm64 [installed,automatic]
libxcb-shm0-dev/stable,now 1.15-1 arm64 [installed]
libxcb-shm0/stable,now 1.15-1 arm64 [installed,automatic]
libxcb-sync1/stable,now 1.15-1 arm64 [installed,automatic]
libxcb-util1/stable,now 0.4.0-1+b1 arm64 [installed,automatic]
libxcb-xfixes0/stable,now 1.15-1 arm64 [installed,automatic]
libxcb-xinerama0/stable,now 1.15-1 arm64 [installed,automatic]
libxcb-xinput0/stable,now 1.15-1 arm64 [installed,automatic]
libxcb-xkb1/stable,now 1.15-1 arm64 [installed,automatic]
libxcb1-dev/stable,now 1.15-1 arm64 [installed,automatic]
libxcb1/stable,now 1.15-1 arm64 [installed,automatic]
xcb-proto/stable,now 1.15.2-1 all [installed]
xcb/stable,now 2.4-8 arm64 [installed]
libxcb-xinput0/stable,now 1.15-1 arm64 [installed,automatic]
xinput/stable,now 1.6.3-1 arm64 [installed]
```

Any help will be really appreciated!

Thanks in advance,

F.


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