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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW - Intermittent graphical corruption since "radeonsi: don't emit partial flushes at the end of IBs (v2)" (c9040dc9)"
href="https://bugs.freedesktop.org/show_bug.cgi?id=101565">101565</a>
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<th>Summary</th>
<td>Intermittent graphical corruption since "radeonsi: don't emit partial flushes at the end of IBs (v2)" (c9040dc9)
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<th>Product</th>
<td>Mesa
</td>
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<th>Version</th>
<td>git
</td>
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<th>Hardware</th>
<td>Other
</td>
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<th>OS</th>
<td>All
</td>
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<th>Status</th>
<td>NEW
</td>
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<th>Severity</th>
<td>normal
</td>
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<th>Priority</th>
<td>medium
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<th>Component</th>
<td>Drivers/Gallium/radeonsi
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<th>Assignee</th>
<td>dri-devel@lists.freedesktop.org
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<th>Reporter</th>
<td>greg@chown.ath.cx
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<th>QA Contact</th>
<td>dri-devel@lists.freedesktop.org
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<pre>Created <span class=""><a href="attachment.cgi?id=132156" name="attach_132156" title="Example of graphical corruption">attachment 132156</a> <a href="attachment.cgi?id=132156&action=edit" title="Example of graphical corruption">[details]</a></span>
Example of graphical corruption
Commit c9040dc9 seems to cause graphical corruption on VI for me. It looks like
some caching issue, since the corruption is intermittent and mostly appears
only for a single frame. Maybe some assumptions made about the kernel's
handling of IBs aren't true?
I can trigger issues reliably by running some OpenCL load in the background
(for instance, an Ethereum miner). That will make X (glamor) and gnome-shell
rendering glitch randomly with high probability.
Reverting the commit fixes the problem completely.
Attached is a screenshot, showing what kind of artefacts I encounter. (Using
the screenshot tool doesn't work as it'll rerender everything before capture)</pre>
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