Does this sound familiar?
I have a GLUT-based OpenGL app (PyMOL) showing a flickering behavior that is
sensitive to other OpenGL rendering activity on the screen. For example, if
I set a molecular surface "rocking" in PyMOL and then drag a window in the
Finder, specular lighting in PyMOL gets all flickery and occasionally the
PyMOL will flash with a solid background color corresponding to one of the
current drawing primitives. The problem is more pronounced on certain
systems than on others, and especially on late-model high-end systems (e.g.
2.2 Ghz dual G5 with a GeForce 6800 Ultra). Apparently some users are
experiencing such severe problems that the app has become unusable.
My diagnosis isn't yet complete, but this issue does seem to be
hardware-specific, and may only occur with late-model nVidia cards & recent
10.3.x and 10.4 beta releases. I have plenty of older nVidia and ATI-based
hardware that doesn't show this issue. In fact, of the hardware I have
access to, only my G5 iMac currently shows the problem.
No bug report filed yet because I am not yet convinced this isn't a problem
in my code. However, I am posting here on the off chance that someone else
might have come across a similar problem recently, and could thus save me
some time...
Thanks in advance for any comments!
Warren
--
Warren L. DeLano, Ph.D.
Principal Scientist
. DeLano Scientific LLC
. 400 Oyster Point Blvd., Suite 213
. South San Francisco, CA 94080
. Biz:(650)-872-0942 Tech:(650)-872-0834
. Fax:(650)-872-0273 Cell:(650)-346-1154
. mailto:email@hidden
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