8 Matching Annotations
  1. Jun 2021
    1. GRUB hidden menu change FAQ  

      details about grub menu hidden and how to enable, access, etc

    1. The GRUB 2 configuration file, grub.cfg, is generated during installation, or by invoking the /usr/sbin/grub2-mkconfig utility, and is automatically updated by grubby each time a new kernel is installed. When regenerated manually using grub2-mkconfig, the file is generated according to the template files located in /etc/grub.d/, and custom settings in the /etc/default/grub file. Edits of grub.cfg will be lost any time grub2-mkconfig is used to regenerate the file, so care must be taken to reflect any manual changes in /etc/default/grub as well.

      Explained how grub.cfg file is generated and the relationship to /etc/default/grub and /etc/grub.d

    2. rhgb
    1. The x86 "PC" version GNU GRUB 2 has a vbeinfo command for printing out available video modes and vbetest for trying a specific mode. They use a built-in table instead of Funcion 01h. For other platforms, including x86 EFI, they are replaced by the more generic videoinfo and videotest.

      The commands vbeinfo and videoinfo can be used to print all supported resolutions. To exit vbetest or videotest in grub, need to send "ctrl+alt+delete" to go back to grub menu list.

    1. When creating a BIOS Boot Partition on a GPT system, you should make sure that it is at least 31 KiB in size.

      This is important. If not set this, the OS won't be detected when grub is used with GPT system.

  2. Jan 2020
  3. May 2019