I had the same problem as @coversnail here: How can I add the Memtest86+ options back to the Grub menu?
The problem is: I just can choose between older kernel versions and the actual Ubuntu version in GRUB. There are no other options.
I want to run memtest86+. It is installed and in /etc/grub.d/, but it is not in GRUB itself. I am kind of confused.
Try Grub Customizer. Grub Customizer is a graphical settings manager for GRUB2.
To install, just press Ctrl+Alt+T on your keyboard to open Terminal. When it opens, run the command(s) below:
sudo add-apt-repository ppa:adabbas/1stppa
sudo apt-get update
sudo apt-get install grub-customizer
Or just check out their website.
To add the memtest entries see images below, and the text.
First Entry
insmod part_msdos
insmod ext2
set root='hd0,msdos1'
if [ x$feature_platform_search_hint = xy ]; then
search --no-floppy --fs-uuid --set=root --hint-bios=hd0,msdos1 --hint-efi=hd0,msdos1 --hint-baremetal=ahci0,msdos1 b4d22d74-d1db-44c3-a834-e879263662f5
else
search --no-floppy --fs-uuid --set=root b4d22d74-d1db-44c3-a834-e879263662f5
fi
linux16 /boot/memtest86+.bin
Second Entry
insmod part_msdos
insmod ext2
set root='hd0,msdos1'
if [ x$feature_platform_search_hint = xy ]; then
search --no-floppy --fs-uuid --set=root --hint-bios=hd0,msdos1 --hint-efi=hd0,msdos1 --hint-baremetal=ahci0,msdos1 b4d22d74-d1db-44c3-a834-e879263662f5
else
search --no-floppy --fs-uuid --set=root b4d22d74-d1db-44c3-a834-e879263662f5
fi
linux16 /boot/memtest86+.bin console=ttyS0,115200n8
Note: Now the above information is correct, but keep in mind that memtest will not work in grub2-uefi . This is because UEFI does not support launching 16-bit binaries and memtest is a 16-bit binary. Thats also the reason why there is no linux16 command/module in grub2 uefi.
Also you may want to look at memtest86+ fails on efi systems.
