while changing the colour for the boot splash screen, i could not reboot back into GDM.
in the grub command line, i tried to mount the sda for repair but it says mount point does not exist.
i also tried the automatic boot repair under FOSS. it says repair successful but it could not boot into GDM too.
then i tried the instructions here:
https://www.linux.com/learn/how-rescue-non-booting-grub-2-linux%20%20
but i have problem when come to this step:
grub> linux /boot/vmlinuz-3.13.0-29-generic root=/dev/sda1 grub> initrd /boot/initrd.img-3.13.0-29-generic
the original installed kernel is 4.15 generic which i have deleted after upgrading to 4.19. but in the /boot directory of the root device i can only find vmlinuz and initrd.img for the 4.15 version.
is there another location where the newly installed 4.19 kernel is kept? i upgraded it using UKUU