[Bug 15538] Screen corruption (triangular parts missing)

[bugzilla-daemon at freedesktop.org]

http://bugs.freedesktop.org/show_bug.cgi?id=15538





--- Comment #8 from Alex Deucher <agd5f at yahoo.com>  2008-04-23 22:35:12 PST ---
Created an attachment (id=16146)
 --> (http://bugs.freedesktop.org/attachment.cgi?id=16146)
possible fix

(In reply to comment #7)
> second patch does not help:-( maybe the VAP_CNTL values are wrong. They are
> also changed but I have no glue what are the right values.
> 

VAP_CNTL shouldn't be relevant as the IGP chips have no PVS block, but perhaps
something needs to be written to that register.  try the attached patch.  Also,
see if any combinations of the patches help.

Another thing to try is to replace this line:
OUT_ACCEL_REG(R300_RB3D_DSTCACHE_CTLSTAT, R300_DC_FLUSH_3D);
with this one:
OUT_VIDEO_REG(R300_RB3D_DSTCACHE_CTLSTAT, R300_DC_FLUSH_3D | R300_DC_FREE_3D);
in radeon_exa_render.c


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