https://bugs.freedesktop.org/show_bug.cgi?id=106175
--- Comment #34 from Michel Dänzer michel@daenzer.net --- (In reply to tempel.julian from comment #33)
I suppose TearFree forces pageflipping regardless, as we don't see any tearing with that configuration.
Right, you'd have to disable TearFree as well. Can be done at runtime with
xrandr --output <output name> --set TearFree off