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ColorBar Display Device States


Color Bars are used to show current device state for quick reference of the system firmware. The Color Bars supported by Q35 are listed below.

Color Bar Legend

Color Bar Example

Color Description Location where Device State is set
Red Secure Boot Disabled MU_OEM_SAMPLE\OemPkg\DeviceStatePei\DeviceStatePei.c
Yellow and Grey Caution Unit Test Mode (Unit Tests Compiled into Firmware) Platforms\QemuQ35Pkg\QemuQ35Pkg.dsc