[Bug 33648] New: Black line in Lightsmark with Z compression enabled (RV530)

[bugzilla-daemon@freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=33648

           Summary: Black line in Lightsmark with Z compression enabled
                    (RV530)
           Product: Mesa
           Version: git
          Platform: Other
               URL: http://dee.cz/lightsmark/Lightsmark2008.2.0.tar.bz2
        OS/Version: All
            Status: NEW
          Severity: minor
          Priority: medium
         Component: Drivers/Gallium/r300
        AssignedTo: dri-devel@lists.freedesktop.org
        ReportedBy: drakkk@centrum.cz


After recent zbuffer compression rework Lightsmark is the only remaining app
I've tested which is still not working properly here on RV530. There is a thick
black line across the screen in some scenes, particularly: "no radiosity","soft
shadows", "penumbra shadows" and the last scene.  Maybe this is a known issue
and there are many open bugs about HyperZ, however according to
db299a9f8244d53d9041fcdbd396a77ebe1f9e3e comment RV530 should just work. So I'm
reporting it isn't. Also this is not a regression, it was much worse before and
this is the only remaining issue here.

To be sure this isn't HiZ issue I've changed line 367 in r300_chipset.c to
"caps->hiz_ram = 0;" and it haven't changed anything.
r300: AA compression: NO, Z compression: YES, HiZ: NO

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