16.04 - Double Ubuntu entry in BIOS boot options - Ask Ubuntu


so today installed ubuntu 16.04.1 second os, windows 10 being first one. after successful installation came cleaning options in bios, , i've seen ubuntu pops twice in boot options section. both of them same when overridden, go grub. why there 2 of them, , why if deleted can seen again after full reboot? can it, , worthy worry about?

bios

type sudo efibootmgr -v in ubuntu terminal window view efi entries in detail. chances 2 ubuntu entries differ, in 1 boot shimx64.efi , other boot grubx64.efi. if secure boot disabled on computer, both entries work; if enable secure boot, chances shimx64.efi entry work. don't know why ubuntu registers both entries, since shimx64.efi entry should work whether secure boot enabled or not.

in principle, remove 1 entry efibootmgr -b #### -b, #### hexadecimal number associated entry want delete. i've seen reports of ubuntu adding these entries back, i've never looked issue in detail.

in end, having 2 ubuntu entries harmless. @ worst, it's bit of clutter when use firmware's boot manager or need adjust entries efibootmgr or similar tools.


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