Comment # 10 on bug 1189174 from Fabian Vogt

That formatting isn't nice to read, here with manual line wraps:

Some more input from upstream:
> Video game based render loop is unsuitable for kwin and other wayland
> compositors that try to maintain the balance between the responsiveness
> (latency) and the smoothness. kwin needs reasonable presentation timestamps to
> function as expected. If the pageflip callback is called immediately, it's
> fine, but kwin needs the timestamp to have a reasonable value (slightly in the
> future) in that case.

> Does the drm driver even report any timestamp at all? If it were to report
> zero, we could maybe handle this in a not completely broken way, but if it
> reports a valid timestamp, it has to roughly match the mode we set the CRTC to.