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<base href="https://bugs.freedesktop.org/">
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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW - [VKMS] vblank counter error"
href="https://bugs.freedesktop.org/show_bug.cgi?id=110904">110904</a>
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<th>Summary</th>
<td>[VKMS] vblank counter error
</td>
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<th>Product</th>
<td>DRI
</td>
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<th>Version</th>
<td>DRI git
</td>
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<th>Hardware</th>
<td>Other
</td>
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<th>OS</th>
<td>Linux (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
</td>
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<th>Component</th>
<td>DRM/other
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<th>Assignee</th>
<td>dri-devel@lists.freedesktop.org
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<th>Reporter</th>
<td>oleg.vasilev@intel.com
</td>
</tr></table>
<p>
<div>
<pre>VKMS uses vblank simulation through hrtimer.
Updates to vblank counter in DRM are performed through drm_update_vblank_count,
where the elapsed time in ns divided by vblank period.
VKMS vblank timestamp computation approach results in negative elapsed time,
which leads to trash u64 division result.</pre>
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</p>
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