2021-12-21 10:32:37 -07:00
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# UEFI
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System76 uses [EDK2](https://github.com/tianocore/edk2) to implement UEFI.
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[coreboot](https://coreboot.org/) is used for Platform Initialization (PI).
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## Booting
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System76 Open Firmware only supports UEFI booting. Legacy BIOS-MBR booting is
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not supported. `\EFI\BOOT\BOOTX64.EFI` must exist on the EFI System Partition
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to be considered valid.
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Network functionality is disabled. Native PXE booting is not supported.
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### Secure Boot
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2023-12-12 09:46:39 -07:00
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Secure Boot support is enabled since system76/firmware-open@105e74b14613
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(2023-04-03).
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2021-12-21 10:32:37 -07:00
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2023-12-12 09:46:39 -07:00
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A minimal firmware UI is available to delete all keys and enroll the default
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keys. It is intended that most management is done from the OS.
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2021-12-21 10:32:37 -07:00
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2023-12-12 09:46:39 -07:00
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Note that the Secure Boot support present is only intended for allowing
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Microsoft Windows installation checks to pass. It should not be relied on for
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system security due to limitations of the implementation.
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2021-12-21 10:32:37 -07:00
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## Shell
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The internal UEFI shell is disabled. A separate binary on a bootable drive
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must be used to access the shell environment.
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