Audacity: The cursor is not moving over the waveform during playback

1.0 Problem

The cursor does not move over the waveform during playback. It does not update during playback.

2.0 Solution

The problem was resolved with the following steps.

1. Close any open Audacity session.
2. Go to the /usr/share/applications directory.
3. Open the file, audacity.desktop, in an editor.
4. Find the line,
   Exec=audacity %F

   Replace it with,
   Exec=env GDK_BACKEND=x11 audacity %F

5. Restart Audacity.