Dear Pymol Users,

I've found a problem with Pymol version 1.4.1. I am using Ubuntu 10.10 in a laptop with Intel Mobile 4 graphics controller.

The problem comes when I load any PDB file, then try to show it as a cartoon. It displays the cartoon but in black color, so I cannot see it unless I turn the background to white. With "lines" it's correctly displayed but "cartoon" or "sticks" show the same behaviour (colored black).

This only happens if I use the "set use_shaders, 1". If I don't use this command, the "cartoon" and "stick" are displayed in the right colour, but then I have problems coloring the sticks (it's a known bug : http://www.mail-archive.com/pymol-users@lists.sourceforge.net/msg09181.html).

I don't know if this is related but immediately after loading the pdb I get this message in the pymol console :
PyMOL>load FILE.pdb
 ObjectMoleculeGuessValences(
1,1): Unreasonable connectivity in heteroatom,
  unsuccessful in guessing valences.

Is this a known bug ? Does anybody know what to do ?

Thanks

Regards,
Santiago

By the way, this is a relevant piece of output of my glxinfo command on linux :
OpenGL vendor string: Tungsten Graphics, Inc
OpenGL renderer string: Mesa DRI Mobile Intel® GM45 Express Chipset GEM 20100330 DEVELOPMENT x86/MMX/SSE2
OpenGL version string: 2.1 Mesa 7.9-devel