Re: sunffb fixes

[Martin Husemann <martin%duskware.de@localhost>]

So I finally was able to upgrade my U2 (with the old Creator revision) to
-current, but unfortunately X won't work at all:

(II) SUNFFB(0): Using XFree86 Acceleration Architecture (XAA)
        Screen to screen bit blits
        Solid filled rectangles
        8x8 mono pattern filled rectangles
        Indirect CPU to Screen color expansion
        Solid Lines
        Dashed Lines
        Driver provided ScreenToScreenBitBlt replacement
        Driver provided WritePixmap replacement
(II) /dev/fb0: Using acceleration
(==) SUNFFB(0): Backing store disabled
(==) SUNFFB(0): Silken mouse enabled
(II) /dev/fb0: DGA support initialized.

Fatal server error:
Caught signal 11.  Server aborting

Unfortunately the backtrace is not very enligthening:

Core was generated by `Xorg'.
Program terminated with signal 6, Aborted.
#0  0x000000004145b3f0 in abort () from /usr/lib/libc.so.12
(gdb) bt
#0  0x000000004145b3f0 in abort () from /usr/lib/libc.so.12
#1  0x00000000001615dc in ddxGiveUp ()
#2  0x000000000026c9bc in AbortServer ()
#3  0x000000000026cee0 in FatalError ()
#4  0x000000000018483c in xf86SigHandler ()
#5  <signal handler called>
#6  0x00000000403b2000 in ?? ()
#7  0x0000000042d04400 in ?? ()
   from /usr/X11R7/lib/modules/extensions//libdbe.so
Previous frame identical to this frame (corrupt stack?)

Right before it crashes the bottom of the screen is filled with solid blue,
about one (console) character line high.

Martin