<div dir="ltr">As my previous email, I mentioned that I am able to find the protocol since the LocateProtocol returns 0 (EFI_SUCCESS) (using the exact code you wrote) . But when I want to open it either with OpenProtocol or HandleProtocol I get a RETURN_UNSUPPORTED. Are you implying that by calling LocateProtocol() the protocol would also be opened? or do I still need to open it? if I still need to open then I am still getting the UNSUPPORTED Status.<div>But if I don't need to open it I still don't know why I am not able to use the GOP methods. </div><div>one example of the many examples which I get this error is as below:</div><div><br></div><div><br></div><div>Status = gBS->HandleProtocol (SystemTable->ConsoleOutHandle, &gEfiGraphicsOutputProtocolGuid, (VOID **)&GraphicsOutput);<br> if (EFI_ERROR (Status)) {<br> Status = gBS->LocateProtocol (&gEfiGraphicsOutputProtocolGuid, NULL, (VOID **)&GraphicsOutput);<br> if (EFI_ERROR (Status)) {<br> Print (L"Error: Could not find a GOP instance!\n");<br> Status = EFI_NOT_FOUND;<br> goto Done;<br> }<br> }<br></div><div>Blt = NULL;<br> ImageWidth = 0;<br> ImageHeight = 0;<br> Status = TranslateBmpToGopBlt (<br> BmpFileData,<br> BmpFileSize,<br> &Blt,<br> &BltSize,<br> &ImageHeight,<br> &ImageWidth<br> );<br></div><div>It is worth mentioning that the BmpFIleData and BmpFileSize are valid variables with the proper data stored. Anyways, the status code for the TranslateBmpToGopBlt returns a RETURN_UNSUPPORTED. This is the same with other GOP methods</div></div><br><div class="gmail_quote"><div dir="ltr" class="gmail_attr">On Wed, Feb 8, 2023 at 12:36 PM Michael Brown <<a href="mailto:mcb30@ipxe.org">mcb30@ipxe.org</a>> wrote:<br></div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex">On 08/02/2023 08:03, Alireza Banejad wrote:<br>
> Below is how I use the HandleProtocol function:<br>
> <br>
> Status = gBS->HandleProtocol (<br>
> gST->ConsoleOutHandle,<br>
> &gEfiGraphicsOutputProtocolGuid,<br>
> (VOID **)&GraphicsOutput<br>
> );<br>
<br>
You are querying only the ConsoleOutHandle, which is not necessarily <br>
where the GOP will be installed.<br>
<br>
Use LocateProtocol() to find the protocol instance instead:<br>
<br>
<br>
Status = gBS->LocateProtocol(&gEfiGraphicsOutputProtocolGuid, NULL,<br>
(VOID **)&GraphicsOutput);<br>
<br>
HTH,<br>
<br>
Michael<br>
<br>
</blockquote></div>
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