Not really.. tried it yourself and you will see no difference. It seems very much like the vsync is disabled (e.g. hard-coded) in the underlying sgx driver so this run-time config is not effective. There are a few more WindowSystem options but none of them make any difference. I am not an expert but I have tried to understand the Maemo video sub-system and hildon-desktop. It seems to me that in addition to no vsync in hw side, there are some other software/toolset issues when deal with graphic drawing and syncing. I tend to think it's related to how hildon-desktop uses clutter... UI smoothness was not high on the to-do list. It's probably about the way he asked, not what he asked....