ubuntu 18.01 boot screen cannot be changed
13154
How to change boot priority?
86090
How do I modify the boot menu for Windows 7?
73121
How can I force Ubuntu to boot on a stuck boot menu?
95152
How do I disable the boot splash screen, and only show kernel and boot text instead?
46973
Cannot change login screen background in 18.10
131331
How to change Windows 8 boot logo (OEM style)?
90002
How can I get grub2 to boot a different option only on the next boot?
47607
Windows boot menu doesn't appear when booting
133911
How to disable Grub's menu from showing up after failed boot
52539
Why can't I choose Ubuntu at boot?
118402
How to remove extra start item from boot menu?
1385
How do I change the GRUB boot order?
108414
Why can't I boot off another drive or change BIOS options after hibernating?
37518
Display grub menu and options without rebooting?
40691
How can I customize the Ubuntu boot up logo?
121308
How do I get the GRUB menu to show when starting my dual-boot system?
114706
How can I change the contents of grub loader?