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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW - GPU HANG (after resuming from hibernation): ecode 9:1:0x4c32ff67, in Xorg [1902], reason: Hang on blitter ring, action: reset (kernel 4.9.0)"
href="https://bugs.freedesktop.org/show_bug.cgi?id=99545">99545</a>
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<th>Summary</th>
<td>GPU HANG (after resuming from hibernation): ecode 9:1:0x4c32ff67, in Xorg [1902], reason: Hang on blitter ring, action: reset (kernel 4.9.0)
</td>
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<th>Product</th>
<td>DRI
</td>
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<th>Version</th>
<td>XOrg git
</td>
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<th>Hardware</th>
<td>x86-64 (AMD64)
</td>
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<th>OS</th>
<td>Linux (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
</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>
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<th>Reporter</th>
<td>unki@netshadow.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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<pre>On returning from hibernation (suspend-to-disk) with kernel 4.9.0 the GPU seems
to get into a state of constantly hung up. A hard reboot is then required.
I had these issues with kernel 4.8.0 too until I added intel_iommu=igfx_off as
kernel cmdline parameter (by the way, Intel VT-d is disabled in BIOS).
Afterwards hibernation worked more or less smoothly (at least no GPU issues).
But now with 4.9.0, also intel_iommu=igfx_off seems to no longer to help.
Hardware: Lenovo ThinkPad X1 Carbon 4th
00:02.0 VGA compatible controller: Intel Corporation HD Graphics 520 (rev 07)
(prog-if 00 [VGA controller])
Subsystem: Lenovo HD Graphics 520
Flags: bus master, fast devsel, latency 0, IRQ 124
Memory at e0000000 (64-bit, non-prefetchable) [size=16M]
Memory at c0000000 (64-bit, prefetchable) [size=512M]
I/O ports at e000 [size=64]
[virtual] Expansion ROM at 000c0000 [disabled] [size=128K]
Capabilities: <access denied>
Kernel driver in use: i915
Kernel modules: i915
OS: Debian Stretch (testing) amd64
user@host:/tmp$ uname -a
Linux carbon 4.9.0-1-amd64 #1 SMP Debian 4.9.2-2 (2017-01-12) x86_64 GNU/Linux
user@host:/tmp$ sudo glxinfo | grep Mesa
client glx vendor string: Mesa Project and SGI
Device: Mesa DRI Intel(R) HD Graphics 520 (Skylake GT2) (0x1916)
OpenGL renderer string: Mesa DRI Intel(R) HD Graphics 520 (Skylake GT2)
OpenGL core profile version string: 4.5 (Core Profile) Mesa 13.0.3
OpenGL version string: 3.0 Mesa 13.0.3
OpenGL ES profile version string: OpenGL ES 3.2 Mesa 13.0.3</pre>
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