During last year, I worked for a long time on Yocto, creating specific meta-layer and stuff.
Despite this, I have never studied the subject of graphic managers.
Since I never needed a windowing system, I always worked with frame buffer.
Now I am working on a project which use a 1920x1080 15.6’’ display.
I need to use that display in portrait mode and I’m looking for a solution that allow me to rotate interface.
Changing “/sys/class/graphics/fb0/rotate” parameters, nothing happens, so I tried switch to X11.
If I understand right, using X11 and xrandr, it is possible to rotate the interface and use display in portrait mode.
I added X11 to my DISTRO_FEATURES and then I added the xrandr utility, but if I run “xrandr --rotate left” I get and error which report:
Can’t open display.
Maybe I’m making a beginner’s mistake, but I’m not experinced on graphic managers.
Can someone help me pls?