[BUG] Video does not work as expected on efi-x86_app64.defconfig

[Simon Glass]

Hi Heinrich,

On Tue, 21 Nov 2023 at 04:58, Heinrich Schuchardt
<heinrich.schuchardt at canonical.com> wrote:
>
> Hello Simon,
>
> I have built efi-x86_app64_defconfig on v2024.01-rc3.
>
> On my laptop the video output appears twice. See
> https://gist.githubusercontent.com/xypron/24ceedb749a68031790864c3a35c5f30/raw/30068496f43e5b088300748d062d0ad64674bf46/screenshot_efi-x86_app64.jpg
>
> Are we accessing the video buffer directly instead of using the EFI API?

Yes...well we are using EFI_GRAPHICS_OUTPUT_PROTOCOL_GUID
(drivers/video/efi.c) but I suspect we are also writing to the serial
port (drivers/serial/efi.c)

If you adjust stdout does that help?

Regards,
Simon