From Anki 2.1.48, you can force Anki to use Wayland by defining ANKI_WAYLAND=1 before starting Anki. Wayland may give you better rendering across multiple displays, but it is currently off by default, due to the following issues:

  • On some distros, Windows are rendered without borders.
  • Bringing windows to the front is not possible, so for example, clicking on Add to reveal an existing Add Cards window will not work.