For a reason I can't quite understand, everything stated working when I
added

ENABLE_UART = "1"

Does anyone understand the relation between ENABLE_UART = "1"  and
RPI_USE_U_BOOT = "1" ?

Thanks

-------------
Jean-Philippe



On Wed, Jan 12, 2022 at 3:59 AM Matthias Klein <[email protected]>
wrote:

> Hello Jean-Philippe,
>
>
>
> >I'm trying to create a simple image that uses the RPI_USE_U_BOOT option
> but the pi hangs with the rainbow image. I'm able to generate bootable
> images when not using the RPI_USE_U_BOOT option (but I need to use
> swupdate).
>
> >I have the same problem with using the Hardknott branch, leading me to
> think the problem is not the layer but the way I use it.
>
> For me the combination of raspberrypi4-64 machine, U-Boot and RAUC
> (instead of swupdate) works.
>
> I think the raspberrypi4 should also work (but haven't tested it).
>
>
>
> I built and tested my (Poky master branch based) image this morning:
> https://github.com/matthiasklein/meta-yocto-coffee-rpi
>
>
>
> I don't use HDMI output though, but a serial console (ENABLE_UART = "1").
>
>
>
> Best regards,
>
> Matthias
>
>
>
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