11/5/2023 0 Comments Open suse leap downloadBrowsing through the menus, it can be discovered that the machine can run in legacy mode (the old BIOS mode), EFI mode and in a hybrid mode, where the actual model will be selected based on the operating system that will be loaded. How can you determine whether you have a UEFI machine? Normally, check the firmware configuration pressing F1 (or ESC, depending on the machine) during the power on process. UEFI, in some sense, is like a small operating system that runs when the machine is powered on and whose main task is to find and load another operating system. These binaries can be device drivers, applications or extensions to the UEFI standard. The standard accepts special binary files compiled for this virtual machine (EFI binaries) that can be executed inside the environment. UEFI has an internal virtual machine that is independent of the architecture that it is using. One of the key points of UEFI is that it can be extended. In fact, openSUSE 12.2 had support for UEFI, and since openSUSE 12.3, there was experimental support for the Secure Boot extension. The good news is that Linux has been able to use EFI at boot time since 2000 using GRUB or elilo. The UEFI specification ( ) is a big document that contains all the interfaces, variables and structures that the firmware manufacturer must provide, and which are accessible to the operating system. But it is when Microsoft announced Windows 8 that UEFI became the required way to boot the new certified machines. Intel has been working in EFI/UEFI since mid 1990s, and there are vendors like HP or Apple that provided EFI machines since a long time ago. In other words, UEFI is meant to replace and extend the old BIOS firmware. Also, UEFI is responsible for providing an interface between the resources that the system provides and the operating system. UEFI will control the system from powering it on until the operating system is fully loaded. UEFI (Unified Extensible Firmware Interface) is an industry standard that specifies the different interfaces that a system must provide in a pre-boot environment.
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