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George Ashby
Asked: 2019-02-12 08:21:44 +0800 CST

GRUB refuses to reboot into a new kernal

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I found the menuentry/subentry that I wanted to use, as you can see here: https://gyazo.com/b73fa2308145caaed7959a95d71a4bc8

I then changed this in /etc/default/grub to this: GRUB_DEFAULT=1>0

I updated grub with: sudo update-grub

And then rebooted the system with: sudo reboot

It still loads into the same old kernal.

I am using Ubuntu 16.04.

grub2 boot kernel

1 Answers

  1. According to the documentation the format is one of

    • GRUB_DEFAULT="Previous Linux versions>Ubuntu, with Linux 3.2.0-18-generic-pae"
    • GRUB_DEFAULT="Previous Linux versions>0"
    • GRUB_DEFAULT="2>0"
    • GRUB_DEFAULT="2>Ubuntu, with Linux 3.2.0-18-generic-pae"

    Your screenshot instead shows

    1>0 Ubuntu, with....

    It lacks the GRUB_DEFAULT= part, the quotes "…", and is a mixture of both numeric and textual item selection. Try

    GRUB_DEFAULT="1>0"
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