The R6 sun ddx uses information returned by the device driver to do
the right thing, so this problem should go away with R6, but the X Consortium
does not have this configuration available to test it.

	This problem comes up on Sun SPARC Classic machines.  There is no X
Consortium fix for this problem, but the correction can be made to X11R5
sources by editing the file "src/mit/server/ddx/sun/sunCG3C.c". Find the
second buffer definition that looks like this:

   typedef struct cg3bc {
   #ifdef sparc
           u_char mpixel[128*1024];         /* bit-per-pixel memory */
           u_char epixel[128*1024];         /* enable plane */
   #endif
           u_char cpixel[CG3B_HEIGHT][CG3B_WIDTH];   /* byte-per-pixel memory */
   } CG3BC, CG3BCRec, *CG3BCPtr;

and change the instances of "128*1024" to "96*1024". Then recompile the
X server.

[thanks to Russ Poffenberger (poffen@San-Jose.ate.slb.com)]