My monitor supports 60 FPS. The Nvidia binary is pretty flawless if I disable
vsync (albiet the tearing) but enabling vsync in effects makes everything look
terrible, choppy and effects go down the drain.
It's really a simple switch. Vsync off and everything is near perfect. Vsync
on and everything goes to hell somewhat. Could this really be a driver bug and
am I the only one experiencing it?
On Tuesday, August 14, 2012 02:35:09 AM Kevin Kofler wrote:
Victor B. Gonzalez wrote:
> I got the Nvidia binary 304.32 on KDE 4.9.00 on Fedora 17. KDE desktop
> effects run pretty flawless at 100+ FPS no matter what I do **but** the
> second I enable vsync on in desktop effect settings, FPS can drop to a
> choppy 30FPS. Why does this happen?
> Not a solid 30 FPS but a choppy 30 FPS.
Limiting the framerate to ~30 FPS (i.e. what your screen can actually
display) is exactly what vsync is for. Now why it's choppy, I don't know. It
might be that the effects are not syncing with vsync, so the FPS varies
depending on when vsync hits compared to what the rendering thread is
doing, or it might just simply be a driver bug (proprietary drivers are
always very buggy, try Nouveau!). (It could be a combination, like the
driver failing to tell clients such as KWin that vsync is in use, which
would of course be a driver bug.)
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Victor B. Gonzalez