issue solved :-) with latest git source of xserver-xorg-video-ati since:18-10-07 short howto: git clone git://anongit.freedesktop.org/git/xorg/driver/xf86-video-ati cd xf86-video-ati ./autogen.sh make # backup your current ati drivers :-) # cp /usr/lib/xorg/modules/drivers/*.so /usr/lib/xorg/modules/drivers/*.backup cp src/.lib/*.so /usr/lib/xorg/modules/drivers/