By default, the transition from one virtual desktop to another one under GNOME2 in Ubuntu 11.04 is visualized with a sliding animation. How can I turn that animation off?
If it is reasonable to turn off all Gnome animations, the following works on Ubuntu 21.10:
Install Gnome Tweaks: https://wiki.gnome.org/Apps/Tweaks (edit: search for and install "Tweaks" in the "Ubuntu Software" app, OR install the "gnome-tweaks" package using the APT command line.)
General > Animations > (turn off the switch)