I already suggested in Barrys log to add a line to .xinitrc, but this is not the solution
XLIB_SKIP_ARGB_VISUALS=1;export XLIB_SKIP_ARGB_VISUALS
Instead, it must go to /etc/profile, I added it before:
LD_LIBRARY_PATH="/lib:/usr/lib:/usr/X11R7/lib:/root/my-applications/lib"
Now Gtk1-applications also work with DRM-modules loaded for grafics-accelleration.
Mark