Disable serial console on RPI 3

[hugener]

Hi guys,

In a project I'm doing I wanted to replace an RPI 2 with an RPI 3 (Maybe someone can also comment on whether this might improve boot times?).

The RPI 3 always enters uboot and thus never boots. I have pinned the problem down to being my RemotePI, which pulls down the GPIO 15 pin (receive pin for the UART) during boot.

From what I can understand the default is that bluetooth now uses the HW UART and the SW (miniuart) UART is assigned to the GPIO pins.
I wonder if there is a way to disable the miniuart so it will be ignored when booting?

[hugener]

For anyone who has encountered this, here is the solution:

The issue is that in U-Boot serial was activated for stderr, stdin and stdout.

$this->bbcode_second_pass_code('', '
setenv stderr vidconsole
setenv stdin usbkbd
setenv stdout vidconsole
saveenv
')

You might want to check whether something else is set using printenv.