Ok. At least rotation in intel-only mode is not broken. I'm not sure, but I believe this "offload" feature is only available with NVIDIA's proprietary driver. More details you can find here. https://download.nvidia.com/XFree86/Linux-x86_64/435.21/README/primerenderoffload.html I'll try later on my Dell laptop, if rotation works in "offload" or at least "nvidia" mode.