/etc/default/grub on OpenSUSE Leap 42.2 is like below. How can I change this file in order to be able to see boot-time kernel messages:# If you change this file, run 'grub2-mkconfig -o /boot/grub2/grub.cfg' afterwards to update# /boot/grub2/grub.cfg.# Uncomment to set your own custom distributor. If you leave it unset or empty, the default# policy is to determine the value from /etc/os-releaseGRUB_DISTRIBUTOR=GRUB_DEFAULT=savedGRUB_HIDDEN_TIMEOUT=0GRUB_HIDDEN_TIMEOUT_QUIET=trueGRUB_TIMEOUT=8GRUB_CMDLINE_LINUX_DEFAULT=resume=/dev/sda4 splash=silent quiet showoptsGRUB_CMDLINE_LINUX=# Uncomment to automatically save last booted menu entry in GRUB2 environment# variable `saved_entry'# GRUB_SAVEDEFAULT=true#Uncomment to enable BadRAM filtering, modify to suit your needs# This works with Linux (no patch required) and with any kernel that obtains# the memory map information from GRUB (GNU Mach, kernel of FreeBSD ...)# GRUB_BADRAM=0x01234567,0xfefefefe,0x89abcdef,0xefefefef#Uncomment to disable graphical terminal (grub-pc only)GRUB_TERMINAL=gfxterm# The resolution used on graphical terminal#note that you can use only modes which your graphic card supports via VBE# you can see them in real GRUB with the command `vbeinfo'GRUB_GFXMODE=auto# Uncomment if you don't want GRUB to pass root=UUID=xxx parameter to Linux# GRUB_DISABLE_LINUX_UUID=true#Uncomment to disable generation of recovery mode menu entries# GRUB_DISABLE_LINUX_RECOVERY=true#Uncomment to get a beep at grub start# GRUB_INIT_TUNE=480 440 1GRUB_BACKGROUND=/boot/grub2/themes/openSUSE/background.pngGRUB_THEME=/boot/grub2/themes/openSUSE/theme.txtSUSE_BTRFS_SNAPSHOT_BOOTING=trueGRUB_USE_LINUXEFI=trueGRUB_DISABLE_OS_PROBER=falseGRUB_ENABLE_CRYPTODISK=n
How to show kernel boot messages by modifying grub config files
grub2;opensuse
Removing quiet and splash generally does the job. Change this:GRUB_CMDLINE_LINUX_DEFAULT=resume=/dev/sda4 splash=silent quiet showoptstoGRUB_CMDLINE_LINUX_DEFAULT=resume=/dev/sda4 showoptsI actually use initcall_debug and no_console_suspend too to get as much detail as possible for debugging, but if everything is working smoothly, those extra parameters won't make any difference.Don't forget to run grub2-mkconfig -o /boot/grub2/grub.cfg after changing the file.