giogio
I live booted with the default options. Maybe I was wrong. Now I tried to boot selecting a consolle resolution of 1280×768 (i.e. modes 31D or 31E when requested) but then the screen however fixed on vesa 1024×768. I do not know if the driver xf86-video-sisimedia-antix was properly loaded, but if I set “sisimedia” in xorg.conf (while it was “vesa” at first glance) X is not able to start (by the way if I search for the video drivers that are on the system I find a “sisimedia_drv” where a “vesa_drv” is too).
Please let me know if I missed something.