I use ubuntu 18.04 and arch in my computer. When booting, grub installed from ubuntu comes up. But when i try to boot onto arch, grub.cfg has wrong uuid for arch partition. So i manually edit grub.cfg for arch entry and replace wrong uuid with correct uuid. It works. But now, when shutting down ubuntu, it takes like 5 mins with “Started wait until snapd is fully seeded”. I googled it and it has a workaround with creating entropy by keyboard. So my question is, is this related to grub editing? And is it a bad thing to edit grub.cfg for replacing wrong uuid?