drm screen rotation on Raspberry PI and Raspberry Touch V2 not working

[wholeinone]

The new Touchdisplay V2 from Raspberry starts in portrait orientation as default.

It is possible to rotate the screen in cmdline.txt for shell and X but not for the drm framebuffer.

by example:

If you rotate the screen 90 deg., the everythings works in landscape view, but if you start your appl. with -drm directly from the console, the screen uses portrait mode again.

Any ideas ?

[thevortexcloud]

This is really a question for https://github.com/AvaloniaUI/Avalonia/ not the docs repo.