I have ubuntu and archlinux in my computer, the BOOT system (grub) is in ubuntu. When i update grub (grub-update) the ubuntu entry gets the ro-quite-splash line. However the arch entry, after de UUID line, nothing is added automatically (Normally I edit the file grub.cfg and add it manually, which is very annoying). I wish grub did it by himself. Sorry for the bad english ;)
This isn't possible with normal configuration. You have to edit the scripts that are run during
You can also use your own variable for this. For details consider the linked article.