[Chimera-users] problems display a mrc or ccp4 file

Tom Goddard goddard at cgl.ucsf.edu
Tue Oct 27 17:35:44 PDT 2009

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.


-------- 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

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