Solved FreeBSD 13 - AMD (RX560) Graphics and no higher Terminal-Screenresolution

I installed FreeBSD13 on a Mac Pro 2010. Everthing is ok, but the shell/terminal resolution is not ok.

1. The drm driver (drm-fbs13-kmod) is installed (via pkg) and loaded, the boot message shows everything is ok.
2. The driver for Xorg (xf86-video-amdgpu) is installed and configured, the maximum screen solution is ok.
3. I tried to set the *hw.syscons.disable=1* in the file /boot/loader.conf, but nothing.

During the boot process the screen is for a short moment black, but the screen size is the same after the moment.

What can i do?