I can not change to a different theme, using plymouth-set-default-theme. I have tried to change to any other theme, and it always shows text as the only theme, even though the list of themes shows all of the ones I have installed. If i run sudo plymouth-set-default-theme solar -R followed by dracut -f and reboot, I get the text theme, 3 dots, and if I run sudo plymouth-set-default-theme it returns text as the theme name, no matter what theme I choose to use.