Then follow the below steps to install GRUB to your disk: See Secure Boot for instructions on implementing it.įirst, install the packages grub and efibootmgr: GRUB is the bootloader while efibootmgr is used by the GRUB installation script to write boot entries to NVRAM.For IA32 (32-bit) UEFI systems (not to be confused with 32-bit CPUs), replace x86_64-efi with i386-efi where appropriate. The section assumes you are installing GRUB for x86_64 systems.A /EFI examples article has been provided for such cases. The procedure described below is intended to work on a wide range of UEFI systems but those experiencing problems despite applying this method are encouraged to share detailed information, and if possible the workarounds found, for their hardware-specific case. UEFI firmwares are not implemented consistently across manufacturers.6.17 GRUB is installed but the menu is not shown at boot.6.15 Device /dev/xxx not initialized in udev database even after waiting 10000000 microseconds.6.4.2 Create a GRUB entry in the firmware boot manager.4.2.3 Chainloading Windows/Linux installed in UEFI mode.4.2.2 Chainloading a disk's MBR or a partitionless disk's VBR.4.2 Using the command shell environment to boot operating systems.3.2.1.3.3 Windows installed in BIOS/MBR mode.3.2.1.3.2 Windows installed in UEFI/GPT mode.3.2.1.2.3 Chainloading a unified kernel image.3.2.1.1.3 "UEFI Firmware Settings" menu entry.3.1.2 Detecting other operating systems.3.1.1 Generate the main configuration file.2.2 Master Boot Record (MBR) specific instructions.2.1 GUID Partition Table (GPT) specific instructions.
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