The BGRT table is very simple compared to other ACPI tables, mainly the position and size of the image. It is an optional form that the firmware uses to report to the OS the image it wants the OS to display at startup: UEFI has added a BGRT table (Boot Graphics Resource Table) in ACPI 5.0 (ACPI and UEFI). As a UEFI column, the reason is of course in the UEFI firmware. If we can replace the manufacturer's logo with our favorite picture, will everything be solved?
Let us first think about a question, why different manufacturers' logos can replace Windows windows in their own computers: Dell's notebook is Dell's logo, and ASUS's notebook is ASUS's logo? Be aware that Microsoft will not launch different OSs for different vendors.
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