[QUOTE='//3iRd(o)]Actually, for 70% of people you'll find it has the complete opposite effect, i.e. to cure mouselag they turn on vysnc.
It all depends on your graphics card. Mouselag is most likely due to the buffering on your graphics card. Since synchronization calls in the video card instruction buffer have been eliminated, your card will keep requesting input from the CPU until the buffer is full. So your card at any point in time may be rendering a frame that you fed it 1-3 frames beforehand, which would explain the mouse lag when at certain framerates. Many people have said that OpenGL fixes this, some say it makes it worse. Since it's rare that people have exactly the same components in their system, there will always be a number of solutions to this issue.[/QUOTE]
Ive tried for 5 years with several different pc setup's and d3d/opengl every command and gfx drivers and gfx card tweaks/os tweaks and i CANNOT get rid of mouse lag in UT
Newer games like 2k4 semi run ok with vsync but it's still no perfect.
CPU limited fps is the only way that works for me ( it's why it's the mindspring opengl renderer ) i asked him to add it and i also have a d3d version from TNSe with cpu frame rate limit.
With this option i dont get any mouse lag but my fps stay at 85
I doubt very much there's a way to stop vsync mouse lag which is very common if you look around.
o yeh ive also had 5 different mice in those 5 years 3 logitech and 2 microsoft tried different driver versions/setup's for that aswell.