I have two Ubuntu systems installed, one 14.04 and one 16.04. From the Grub menu I can see that:
*Ubuntu Memory test (memtest86+) Ubuntu 14.04.4 LTS (on /dev/sda1) Ubuntu 16.04.2 LTS (on /dev/mapper/ubuntu--vg--root)
Every time, the PC will start by the default Ubuntu option, and load the Ubuntu 14.04. I want to change this default start up to Ubuntu 16.04. However, not successful.
Things I tried:
GRUB_DEFAULT="saved" GRUB_SAVEDEFAULT="true" GRUB_HIDDEN_TIMEOUT_QUIET="true" GRUB_TIMEOUT="10" GRUB_DISTRIBUTOR="
lsb_release -i -s 2> /dev/null || echo Debian" GRUB_CMDLINE_LINUX_DEFAULT="root=/dev/mapper/ubuntu--vg--root" GRUB_PRELOAD_MODULES="lvm"
Neither GRUB_DEFAULT="saved" or GRUB_DEFAULT="3" is working.
Try to change 40_custom of grub.d not working
In the grub.cfg file, there is no Ubuntu 16.04 (which is really strange as I can see this option in the Grub and I can manually scroll down and choose to start with Ubuntu 16.04).
In the Grub Customizer there is no Ubuntu 16.04, but has Ubuntu 14.04
Please advice what should I do. Thanks.