[Chimera-users] graphics problems after update from UCSF-Chimera64-1.5.3 to UCSF-Chimera64-1.6.2

Dieter Blaas dieter.blaas at meduniwien.ac.at
Mon Aug 20 23:28:11 PDT 2012

Hi Tom,

   thanks for your quick reply!

Yes, I kept the previous installation in a different directory and it 
still works. So there must indeed be a difference between the two 
versions that causes the problem.

And, yes, chimera 1.6.2 crashes when fired up and does not get to the 
point where I could use the Help function. It shows the splash screen 
and dies when displaying "initializing graphics".

I thus used the OpenGL debug function in version 1.5.3 to output the 
info on drivers etc. (see attached image)


Am 21.08.2012 00:26, schrieb Tom Goddard:
> This is a graphics driver problem.  If you are running Chimera on one 
> machine and displaying on another then the graphics driver (or Mesa) 
> on either machine could cause the problem, or they just aren't able to 
> talk to each other. First thing I would try is install 1.5.3 (if you 
> removed it) and see that it still works. You can have Chimera 1.6.2 
> and 1.5.3 installed at the same time. Just put them in different 
> directories.  I don't know of any difference between Chimera 1.6.2 and 
> 1.5.3 that would explain why one would work and not the other.  You 
> could also try the Chimera daily build.
> Does Chimera crash when you load data or just when you start up? If it 
> starts you should use Help / Report a Bug  so we know your graphic 
> driver and other system info.
>     Tom
>> Hi,
>>    I replaced the previous version of  Chimera, UCSF-Chimera64-1.5.3  
>> with the new one UCSF-Chimera64-1.6.2 on our cluster running Linux 
>> l22 2.6.32-131.17.1.el6.x86_64 #1 SMP Wed Oct 5 17:19:54 CDT 2011 
>> x86_64 x86_64 x86_64 GNU/Linux
>> whereas everything was perfect so far I now get the error message:
>> X Error of failed request:  GLXBadContextTag
>>   Major opcode of failed request:  153 (GLX)
>>   Minor opcode of failed request:  5 (X_GLXMakeCurrent)
>>   Serial number of failed request:  1352
>>   Current serial number in output stream:  1352
>> followed by a crash. This is annoying since I need the new version 
>> for compatibility with some sessions saved with the new version on 
>> another machine.
>> Thanks a lot for hints, Dieter

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