Something

Checking for Xgl: not present. 
Detected PCI ID for VGA: 01:00.0 0300: 10de:0140 (rev a2) (prog-if 00 [VGA])
Checking for texture_from_pixmap: present. 
Checking for non power of two support: present. 
Checking for Composite extension: present. 
Comparing resolution (2720x1024) to maximum 3D texture size (4096): Passed.
Checking for nVidia: present. 
Checking for FBConfig: present. 
Checking for Xgl: not present. 
Starting emerald
Segmentation fault (core dumped)