X locks at -bpp 16

[David Densmore <dden@rollanet.org>]

I have a Diamond SpeedStar Pro with CL-GD5426 chip and am running
the svga X server.

It works fine when I run it at -bpp 8, but at -bpp 16 it starts with
a completely black background and the mouse freezes as soon as I place
the xterm window on the screen (still using TWM).  After a couple of
minutes the mouse will unfreeze and I can move it around the edge of
the screen, but if I move it over the xterm window it will freeze
again.

Does anyone know what to do about this?

Thank you,
David Densmore <dden@rollanet.org>