32bpp is not a valid color depth for Linux machines, but some ATi Linux cards incorrectly allow it.
CORE Generator does not support this configuration since 32bpp is not a valid color depth for Linux machines. However, CORE Generator should be able to detect the problem and prevent a hang condition.
To resolve the issue change the X11 color depth from 32bpp to 24bpp.
Changing color depth is a setting in the xorg.conf file and editing that file requires root access.