[Bug]: An unexpected black box appears at Setup Hotkey Region.

[EricGao2015]

Is there an existing issue for this?

• I have searched existing issues

Bug Type

• Firmware
• Tool
• Unit Test

What packages are impacted?

MdeModulePkg

Which targets are impacted by this bug?

NO-TARGET, NOOPT, DEBUG, RELEASE

Current Behavior

I customize UEFI Setup with MdeModulePkg/Library/CustomizedDisplayLib library and change KEYHELP_BACKGROUND from EFI_BACKGROUND_BLACK to EFI_BACKGROUND_BLUE. The Setup video resolution is 800*600. When I exit from UEFI Shell to Setup page, an unexpected black box appears at Setup HotKey Region.

Expected Behavior

Exit from UEFI Shell to Setup page, the background of Setup HotKey Region is blue, no black box appears.

Steps To Reproduce

1. use MdeModulePkg/Library/CustomizedDisplayLib as CustomizedDisplayLib and change KEYHELP_BACKGROUND from EFI_BACKGROUND_BLACK to EFI_BACKGROUND_BLUE.
2. Set Setup video resolution as 800*600.
3. Boot to Setup, enter UEFI Shell, and exit from Shell to Setup.

Build Environment

- OS(s): CentOS Linux 8
- Tool Chain(s): https://github.com/loongson/build-tools/releases/download/2024.11.01/x86_64-cross-tools-loongarch64-binutils_2.43.1-gcc_14.2.0-glibc_2.40.tar.xz

Version Information

Tag: edk2-stable202411

Urgency

Low

Are you going to fix this?

I will fix it

Do you need maintainer feedback?

No maintainer feedback needed

Anything else?

No response