[edk2-devel] Graphic Output on qemu

[Michael Brown]

On 08/02/2023 08:03, Alireza Banejad wrote:
> Below is how I use the HandleProtocol function:
> 
>    Status = gBS->HandleProtocol (
>                    gST->ConsoleOutHandle,
>                    &gEfiGraphicsOutputProtocolGuid,
>                    (VOID **)&GraphicsOutput
>                    );

You are querying only the ConsoleOutHandle, which is not necessarily 
where the GOP will be installed.

Use LocateProtocol() to find the protocol instance instead:


   Status = gBS->LocateProtocol(&gEfiGraphicsOutputProtocolGuid, NULL,
                                (VOID **)&GraphicsOutput);

HTH,

Michael



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