Re: Multiple fedora grub entries because Plymouth
Plymouth themes use different plugins. They are located in /usr/lib64/plymouth/.
I am using a theme using the plugin 'script' without problem. You tried the theme solar that uses 'space-flares' without problem.
May be the problem is relative to the plugin. Could you report which one it is?
For instance, if your theme is solar, it is the entry 'ModuleName' in '/usr/share/plymouth/themes/solar/solar.plymouth'
For grub, maybe it is really grubby that is guilty...