[xorg-bugzilla-noise] [Bug 1117] New: cw and cfb don't play nice together

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https://freedesktop.org/bugzilla/show_bug.cgi?id=1117        
   
           Summary: cw and cfb don't play nice together
           Product: xorg
           Version: CVS_head
          Platform: PC
        OS/Version: Linux
            Status: NEW
          Severity: critical
          Priority: P2
         Component: Server/general
        AssignedTo: xorg-bugzilla-noise at freedesktop.org
        ReportedBy: ajax at nwnk.net


Attempting to use Composite using an s3virge in cfb mode makes the server
segfault.  It works fine in fb mode, which is the default.

This will affect:
- all sunffb and sunleo users
- s3virge users who say Option "UseFB" "no" in xorg.conf
- i740, nsc, s3, siliconmotion, and via users who explicitly built their drivers
to use cfb instead of fb
- people building Xsun from our tree (assuming Xsun even builds anymore, and
that it builds with the composite wrapper)

Since except for sunffb and sunleo cfb is not the default, I'm tempted to say
the right fix is to migrate those two to fb and remove cfb altogether.  Note
though that the overlay framebuffer cores (xf8_16bpp etc) use cfb too, and I
don't know how hard it would be to switch them to fb.

At any rate this should either be fixed or documented for the release.        
   
   
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