HDMI display does not rotate

[Fra]

Good morning,

I'm using RK3328 SOM-EVB by Olimex with Armbian 22.02.0-trunk  with Linux 4.4.213-rockchip64. I'm using it with an HDMI LDC 7" capcaitive touchscreen by Waveshare (https://www.waveshare.com/product/displays/lcd-oled/lcd-oled-1/7inch-hdmi-lcd-h.htm).

I can't rotate the LCD in portrait mode.

In Application->Screen the "Rotation" section is "none" and there aren't any other choice (like left, right, inverted).

If in command line I use:

xrandr --output HDMI-1 --rotate left

 

it gives me back:

xrandr: output HDMI-1 cannot use rotation "left" reflection "none"

 

Does anybody knows how to solve it and rotate the LCD?

 

Thanks