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<body><span class="vcard"><a class="email" href="mailto:giovanni.grc96@gmail.com" title="Giovanni Grieco <giovanni.grc96@gmail.com>"> <span class="fn">Giovanni Grieco</span></a>
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<a class="bz_bug_link
bz_status_NEW "
title="NEW - [bdw-u iommu] DMAR error -> GPU hang"
href="https://bugs.freedesktop.org/show_bug.cgi?id=89360">bug 89360</a>
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<td>giovanni.grc96@gmail.com
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<b><a class="bz_bug_link
bz_status_NEW "
title="NEW - [bdw-u iommu] DMAR error -> GPU hang"
href="https://bugs.freedesktop.org/show_bug.cgi?id=89360#c80">Comment # 80</a>
on <a class="bz_bug_link
bz_status_NEW "
title="NEW - [bdw-u iommu] DMAR error -> GPU hang"
href="https://bugs.freedesktop.org/show_bug.cgi?id=89360">bug 89360</a>
from <span class="vcard"><a class="email" href="mailto:giovanni.grc96@gmail.com" title="Giovanni Grieco <giovanni.grc96@gmail.com>"> <span class="fn">Giovanni Grieco</span></a>
</span></b>
<pre>Created <span class=""><a href="attachment.cgi?id=138682" name="attach_138682" title="crash dump of Intel Iris Graphics 6100">attachment 138682</a> <a href="attachment.cgi?id=138682&action=edit" title="crash dump of Intel Iris Graphics 6100">[details]</a></span>
crash dump of Intel Iris Graphics 6100
Description of problem:
GPU HANG when launch systemctl start graphical.target with kernel flag
"intel_iommu=on"
Version-Release number of selected component (if applicable):
xorg-x11-drv-intel-2.99.917-31.20171025.fc27.x86_64
gnome-shell-3.26.2-4.fc27.x86_64
kernel-4.15.14-300.fc27.x86_64
How reproducible:
100%
Steps to Reproduce:
1. Boot with kernel option 'intel_iommu=on'.
2. GPU will hang at the start of GDM login screen.
Actual results:
dmesg:
[ 354.039739] [drm] GPU HANG: ecode 8:-1:0x00000000, reason: Kicking stuck
wait on rcs0, action: continue
[ 354.039740] [drm] GPU hangs can indicate a bug anywhere in the entire gfx
stack, including userspace.
[ 354.039740] [drm] Please file a _new_ bug report on bugs.freedesktop.org
against DRI -> DRM/Intel
[ 354.039741] [drm] drm/i915 developers can then reassign to the right
component if it's not a kernel issue.
[ 354.039741] [drm] The gpu crash dump is required to analyze gpu hangs, so
please always attach it.
[ 354.039742] [drm] GPU crash dump saved to /sys/class/drm/card0/error
Expected results:
GPU not hang
Additional info:
Hardware: Apple MacBook Pro Early 2015 13-inch
GPU: Intel Iris Graphics 6100
Distro: Fedora Workstation 27 x86_64</pre>
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