 <p>I solved it now on my own by updating some <code>mesa</code> concerning packages. I'm running debian stable with those following packages from backports:</p> <blockquote> <p>initramfs-tools, libdrm-intel1, libgl1-mesa-dev, libgl1-mesa-dri, libgl1-mesa-glx, linux-base, linux-headers-3.2.0-0.bpo.1-all-amd64, linux-headers-3.2.0-0.bpo.1-amd64, linux-headers-3.2.0-0.bpo.1-common, linux-headers-3.2.0-0.bpo.1-common-rt, linux-headers-3.2.0-0.bpo.1-rt-amd64, linux-headers-3.2.0-0.bpo.2-all-amd64, linux-headers-3.2.0-0.bpo.2-amd64, linux-headers-3.2.0-0.bpo.2-common, linux-headers-3.2.0-0.bpo.2-common-rt, linux-headers-3.2.0-0.bpo.2-rt-amd64, linux-image-3.2.0-0.bpo.2-amd64, linux-kbuild-3.2, mesa-common-dev</p> </blockquote> <p>Hoping this info will help other, too.</p>