Thanks everyone for the informations. for now i went for the libre kernel 3.6 and the drivers offered by
https://launchpad.net/~ubuntu-x-swat/+archive/intel-graphics-updates I will see how that behaves. what i am wondering though, in the system->details->graphics it says: Driver: Intel Ivybridge Desktop Experience: Fallback couldn't it say something more better sounding than fallback? and in /var/log/Xorg.0.log i find [ 22.418] (II) Loading /usr/lib/xorg/modules/drivers/intel_drv.so [ 22.418] (WW) Falling back to old probe method for vesa [ 22.418] (WW) Falling back to old probe method for fbdev so am still not sure, if the drivers are correct.
