http://bugs.freedesktop.org/show_bug.cgi?id=11174





------- Comment #11 from [EMAIL PROTECTED]  2008-01-03 07:33 PST -------
Okay, I've bitten the bullet and spend an entire day git bisecting this.

Actually there are 2 regression moments where the trackballs has black vertices
problem get introduced, the first one between 6.5.0 and 6.5.1, I've managed to
find this with git-bisect and made a patch which fixes 6.5.1, then there is
another regression between 6.5.1 (with attached fix) and current master.

bisecting this led me too the vbo merger, after which all I got where either
crashing or non building revisions.

Today I've spend an hour or so trying to fix this by looking at how trackballs
does this, this has lead to a patch to trackballs which fixes (or workarounds?)
this. I'm not sure if trackballs is to blame though, as it works fine with
intel cards (7.0.2) and with the software renderer.

I'll also attach that patch, perhaps it sheds some light on this.


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