After the upgrade of desktops from bullseye to bookworm with cinnamon
as desktop environment the bell character in a shell does not produce
a sound.

Type in a bash in xterm or gnome-terminal :

echo -e '\a'

With environments older that bookworm this would sound a beep or bell
via the pcspkr kernel module.

With the new cinnamon there is only silence.
The pcspkr module is loaded but no bell sounds.

Regards
Christoph