Tearing problem at bigger overlay sizes

[Xavier Bestel]

On Tue, 2009-01-13 at 17:41 +0100, Matthias Hopf wrote:
> > tear free. Sometimes the diagonal tear can be seen in one or more (2..4  
> > segments out of 11) of the 100 line segments. This last point is really 
> > puzzling, this could indicate the graphics engine is just keeping up 
> > with the refresh, slightly slower or slightly faster.
> 
> Could be a caching issue, pushing out the cache after each block might
> help.

Why not just after the last block ?