#191 Pymol segfaults on pdb load if user is not in video group

[Jon Phillips]

I have pymol 1.8.4.0 installed on gentoo linux. If my user account is not in the video group, booting pymol and loading a pdb gives the following:

libGL error: failed to open drm device: Permission denied
libGL error: failed to load driver: i965
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 Detected OpenGL version 2.0 or greater. Shaders available.
 Detected GLSL version 1.30.
 OpenGL graphics engine:
  GL_VENDOR:   VMware, Inc.
  GL_RENDERER: Gallium 0.4 on llvmpipe (LLVM 3.9, 256 bits)
  GL_VERSION:  3.0 Mesa 17.0.6
 Detected 4 CPU cores.  Enabled multithreaded rendering.
HEADER    LIPID BINDING PROTEIN                   30-JUN-04   1TW4
TITLE     CRYSTAL STRUCTURE OF CHICKEN LIVER BASIC FATTY ACID BINDING
TITLE    2 PROTEIN (BILE ACID BINDING PROTEIN) COMPLEXED WITH CHOLIC
TITLE    3 ACID
COMPND    MOL_ID: 1;
COMPND   2 MOLECULE: FATTY ACID-BINDING PROTEIN;
COMPND   3 CHAIN: A, B;
COMPND   4 SYNONYM: L-FABP, LIVER BASIC FABP, LB- FABP, BILE ACID-
COMPND   5 BINDING PROTEIN
 ObjectMolecule: Read secondary structure assignments.
 ObjectMolecule: Read crystal symmetry information.
 CmdLoad: "/home/work/Molecules/1TW4.pdb" loaded as "1TW4".
Segmentation fault

This is reproducable for other pdbs.

The libGL errors at the start are fine: pymol can't access /dev/dri/card0, so it complains. But it should not segfault when a file is loaded - it should throw an error, or exit a little more gracefully.

The segfault does not occur when the user is in the videos group (nor do the libGL errors, no surprise).