Black screen on boot

[LNXlady]

Hmm...

Code:

sudo update-grub

should create a boot entry.

It finds it, but still doesn't show it in the grub menu. Nor does it show the Maui theme, even though it finds that, too.

Code:

Generating grub configuration file ...
Found theme: /boot/grub/themes/maui/theme.txt
Found linux image: /boot/vmlinuz-4.7.2-040702-generic
Found initrd image: /boot/initrd.img-4.7.2-040702-generic
Found linux image: /boot/vmlinuz-4.4.0-36-generic
Found initrd image: /boot/initrd.img-4.4.0-36-generic
Found linux image: /boot/vmlinuz-4.4.0-34-generic
Found initrd image: /boot/initrd.img-4.4.0-34-generic
Found memtest86+ image: /boot/memtest86+.elf
Found memtest86+ image: /boot/memtest86+.bin
Found Netrunner 14.2 (Frontier) (14.2) on /dev/sda1
Found Peppermint 7 Seven (7) on /dev/sda6
Found OpenMandriva Lx 3.0 (3.0) on /dev/sda9
done