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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW - Support WDDM 1.3 and embedded display in qxl-wddm-dod for an Optimus Windows guest hybrid setup"
href="https://bugs.freedesktop.org/show_bug.cgi?id=106760">106760</a>
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<th>Summary</th>
<td>Support WDDM 1.3 and embedded display in qxl-wddm-dod for an Optimus Windows guest hybrid setup
</td>
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<th>Product</th>
<td>Spice
</td>
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<th>Version</th>
<td>unspecified
</td>
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<th>Hardware</th>
<td>x86-64 (AMD64)
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<th>OS</th>
<td>Windows (All)
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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>win32 qxl xddm
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<th>Assignee</th>
<td>spice-bugs@lists.freedesktop.org
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<th>Reporter</th>
<td>oblitz@protonmail.com
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<p>
<div>
<pre>There have been progress to get an Nvidia dGPU to work in a Windows guest in an
Optimus setup for the past year. A hacky OVMF patch [1] has allowed the dGPU to
initialize properly, bypassing the error 43, and allowed certain applications
to make use of the dGPU at a near-native performance.
However, the number of applications that are clever enough to make use of the
dGPU seem rare. A reason for this could be due to a lack of proper hybrid setup
where an integrated/embedded display panel is not detected.
A potential solution to this could be to modify the qxl-wddm-dod driver to WDDM
1.3 and expose the emulated display as an embedded display. [2,3,4]
[1] <a href="https://github.com/jscinoz/optimus-vfio-docs/issues/2">https://github.com/jscinoz/optimus-vfio-docs/issues/2</a>
[2]
<a href="https://github.com/jscinoz/optimus-vfio-docs/issues/2#issuecomment-390550145">https://github.com/jscinoz/optimus-vfio-docs/issues/2#issuecomment-390550145</a>
[3] <a href="https://www.redhat.com/archives/vfio-users/2018-April/msg00019.html">https://www.redhat.com/archives/vfio-users/2018-April/msg00019.html</a>
[4]
<a href="https://reddit.com/r/VFIO/comments/8gv60l/current_state_of_optimus_muxless_laptop_gpu/">https://reddit.com/r/VFIO/comments/8gv60l/current_state_of_optimus_muxless_laptop_gpu/</a></pre>
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</p>
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