I know. But despite I don't get the warning any longer, it still seems an issue with acceleration. The person uses 3 monitors connected to an external docking station. It seems not working only with his hardware configuration. I don't know what else I could do or how to debug.
Other colleagues, also with 3 monitors, have a different docking station (the laptop fits in it) and it works.
Ah, but that is entirely different situation! (Unrelated to april post).
Before I start asking about specifics, have you tested with e.g. theide or uword?