thank you very much "Magic banana"
I commented out all keywords radeon which I found under directory
/etc/modprobe.d/.
found was: "blacklist radeonfb"
in /etc/modprobe.d/fbdev-blacklist.conf
/etc/modprobe.d/disable-radeon.conf
/etc/modprobe.d/blacklist-framebuffer.conf
I tryied to apply: update-initramfs -u
with result:root@m:/home/meydlo# update-initramfs -u
update-initramfs: Generating /boot/initrd.img-3.19.3-gnu
W: mdadm: /etc/mdadm/mdadm.conf defines no arrays.
then I rebooted but it didn't worked.
unless I did it wrong
