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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW - [SNB] INTEL_DEBUG=nohiz is likely broken for depth/stencil buffers"
href="https://bugs.freedesktop.org/show_bug.cgi?id=109985">109985</a>
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<th>Summary</th>
<td>[SNB] INTEL_DEBUG=nohiz is likely broken for depth/stencil buffers
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<th>Product</th>
<td>Mesa
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<th>Version</th>
<td>git
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<th>Hardware</th>
<td>Other
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<th>OS</th>
<td>All
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<th>Status</th>
<td>NEW
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<th>Severity</th>
<td>normal
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<th>Priority</th>
<td>medium
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<th>Component</th>
<td>Drivers/DRI/i965
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<th>Assignee</th>
<td>intel-3d-bugs@lists.freedesktop.org
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<th>Reporter</th>
<td>nanleychery@gmail.com
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<th>QA Contact</th>
<td>intel-3d-bugs@lists.freedesktop.org
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<pre>For SNB, INTEL_DEBUG=nohiz seems to be broken in two places:
1. In miptree_create() in intel_mipmap_tree.c. Trying to create a depth/stencil
buffer will cause a depth miptree to be created without stencil.
2. In isl_genX(emit_depth_stencil_hiz_s) in isl_emit_depth_stencil.c. Emitting
a depth/stencil buffer instruction will unconditionally force HiZ on.
I haven't tested/verified these observations.
mesa version: ae77f1236862e73c1ac250898924c648d481bda4</pre>
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