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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