It worked quite good, but ubuntu only has the old X-Server running (X.Org X Server 1.11.3 according to /var/log/Xorg.0.log).
Therefore my problems remain the same:
[ 3.770] (EE) AIGLX error: i965 exports no extensions (/usr/lib/x86_64-linux-gnu/dri/i965_dri.so: undefined symbol: __driDriverExtensions) [ 3.771] (EE) AIGLX: reverting to software rendering
This would help me, and most likely others with a Haswell processor, alot.
Thank you in advance.