I have the same issue on Ubuntu 13.04 64bit with a external monitor attached to my Lenovo T400 (with Intel Mobile 4 Series Chipset Integrated Graphics Controller). I rediced the resolution to 1024x768 without any results.
I have the same issue on Ubuntu 13.04 64bit with a external monitor attached to my Lenovo T400 (with Intel Mobile 4 Series Chipset Integrated Graphics Controller).
I rediced the resolution to 1024x768 without any results.