Ken Nakata <masami@fa2.so-net.or.jp> suggested:

>This is a problem with the grf driver, not the X server.  It might
>help if you could show us some snippet about grf device(s) from the
>dmesg output.

>From what's on the screen at the moment:

mainbus0 (root)
obio0 at mainbus0
...
intvid0 at obio0: Internal Video
intvid0: 512 x 342, monochrome
grf0 at intvid0
ite0 at obio0 (minimal console)
...

Does that help?  I don't even understand the messages.  The screen size 
is correct.  There is more about screen location but it's not trapped by 
demsg.

Note that the message at the bottom of the X screen says:

Screen 0 at 0x41ad000, 512 by 342, rowB 64, fbase 0xbf9a80

Again, I don't know what this means.

Finally, the initial boot meesage gives the following addresses for thge 
screen:

Screen 0xfee09a80 physical 0x9f9a80 length 0x8000

Why are these so different from the above?

Is there anyhting else I can do to help debug this?  Unfortunately, the 
patches for ADBTEST#160 are not available, though I doubt I could do much 
even if they were.

Yours,

Andrew