Our lcd panel in our project is portrait. (800x1280)
We want to rotate our screen to 1280 x 800. (landscape)
We tried to use xrandr command to rotate screen.
It failed by it can’t open display.
But our lcd panel driver can show ubuntu normally.
root@tegra-ubuntu:~# xrandr -o left
Can’t open display
Can you provide some method for us to rotate screen?
Or tell us how to fix the problem “xrandr can’t open display”.