Hi Mario,

I have seen the sliced bread volume contour surface appearance many times before and every time it was with Mesa. I've never seen it with an nvidia driver. The cases I've seen are a bug in the Mesa client-side library so if you are remote displaying Chimera from another machine then you will see the problem even if the machine you are displaying on has nvidia drivers if the machine Chimera actually runs on is using Mesa.

If your case does not involve Mesa at all you should report a bug using Chimera menu entry Help / Report a Bug... which will give us your graphics driver info. It is definitely a graphics driver bug and we like to keep track of which drivers have problems.

Tom

-------- Original Message --------
Subject: Re: [Chimera-users] problems display a mrc or ccp4 file
From: maillist
To: Tom Goddard
Date: 10/23/09 4:56 AM

Hi Tom,
I allready have the nvidia drivers installed (185.18.14) and also a very
new mesa driver (7.5.1) and tried 7.5.2 without any success.
Greg Couch told me to try an other graphic card, so I think I have to try
this...
I will open a bug report for this issue later, if there are no other
suggestions.

Regards
Mario

The surface display bug is a bug in Mesa which is the OpenGL used by
linux if you have no driver installed.  We call this the sliced bread
bug.  Here's the bug report:

http://plato.cgl.ucsf.edu/trac/chimera/ticket/6088

and the fix:

"Fixed by installing graphics driver.  Incorrect surface rendering
caused by vertex buffer object bug in Mesa 6.5.1."

   Tom