There is no ready to use script to do this but quick test with matchbox I did allow me to start chromium in portrait. It could be also done without matchbox: with --window-size= arg for chromium and that browser addon but in my test that didn't work in all cases. Don't expect too much. All is very hacky. Code: ./chroot.sh WAYLAND_DISPLAY=../../display/wayland-0 Xwayland & # make sure to run it when device is in portrait mode sudo apt install matchbox matchbox-session & matchbox-keyboard & chromium-browser
./chroot.sh WAYLAND_DISPLAY=../../display/wayland-0 Xwayland & # make sure to run it when device is in portrait mode sudo apt install matchbox matchbox-session & matchbox-keyboard & chromium-browser