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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 - [BDW] intel_iommu=on GPU hang"
href="https://bugs.freedesktop.org/show_bug.cgi?id=100076">100076</a>
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<th>Summary</th>
<td>[BDW] intel_iommu=on GPU hang
</td>
</tr>
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<th>Product</th>
<td>DRI
</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>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/Intel
</td>
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<th>Assignee</th>
<td>intel-gfx-bugs@lists.freedesktop.org
</td>
</tr>
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<th>Reporter</th>
<td>pothos@riseup.net
</td>
</tr>
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<th>QA Contact</th>
<td>intel-gfx-bugs@lists.freedesktop.org
</td>
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<th>CC</th>
<td>intel-gfx-bugs@lists.freedesktop.org
</td>
</tr></table>
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<div>
<pre>Created <span class=""><a href="attachment.cgi?id=130083" name="attach_130083" title="/sys/class/drm/card0/error (gz)">attachment 130083</a> <a href="attachment.cgi?id=130083&action=edit" title="/sys/class/drm/card0/error (gz)">[details]</a></span>
/sys/class/drm/card0/error (gz)
When activating intel_iommu=on GPU hangs can happen (here in GNOME Shell
Wayland shortly after wakeup from suspend).
With intel_iommu=on,igfx_off it seems to be fine.
CPU: Intel Core i3-5010U CPU @ 2.1GHz
GPU: Mesa DRI Intel(R) HD Graphics 5500 (Broadwell GT2)
Linux 4.9.0-2-amd64 #1 SMP Debian 4.9.13-1 (2017-02-27) x86_64 GNU/Linux
dmesg:
[ 470.659847] DMAR: DRHD: handling fault status reg 3
[ 470.659854] DMAR: [DMA Write] Request device [00:02.0] fault addr fb149000
[fault reason 23] Unknown
[ 480.871397] [drm] GPU HANG: ecode 8:0:0x85dffffb, in gnome-shell [2879],
reason: Hang on render ring, action: reset
[ 480.871398] [drm] GPU hangs can indicate a bug anywhere in the entire gfx
stack, including userspace.
[ 480.871399] [drm] Please file a _new_ bug report on bugs.freedesktop.org
against DRI -> DRM/Intel
[ 480.871399] [drm] drm/i915 developers can then reassign to the right
component if it's not a kernel issue.
[ 480.871400] [drm] The gpu crash dump is required to analyze gpu hangs, so
please always attach it.
[ 480.871400] [drm] GPU crash dump saved to /sys/class/drm/card0/error
[ 480.876006] drm/i915: Resetting chip after gpu hang
[ 492.838851] drm/i915: Resetting chip after gpu hang
[ 502.823063] drm/i915: Resetting chip after gpu hang</pre>
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</p>
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