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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW - CONFIG_DEBUG_*MUTEX* causes i915 deadlock on several platforms"
href="https://bugs.freedesktop.org/show_bug.cgi?id=93666">93666</a>
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<th>Summary</th>
<td>CONFIG_DEBUG_*MUTEX* causes i915 deadlock on several platforms
</td>
</tr>
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<th>Product</th>
<td>DRI
</td>
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<th>Version</th>
<td>DRI git
</td>
</tr>
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<th>Hardware</th>
<td>x86-64 (AMD64)
</td>
</tr>
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<th>OS</th>
<td>Linux (All)
</td>
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<th>Status</th>
<td>NEW
</td>
</tr>
<tr>
<th>Severity</th>
<td>blocker
</td>
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<th>Priority</th>
<td>medium
</td>
</tr>
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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>tomi.p.sarvela@intel.com
</td>
</tr>
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<th>QA Contact</th>
<td>intel-gfx-bugs@lists.freedesktop.org
</td>
</tr>
<tr>
<th>CC</th>
<td>intel-gfx-bugs@lists.freedesktop.org
</td>
</tr></table>
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<pre>Created <span class=""><a href="attachment.cgi?id=120953" name="attach_120953" title="Serial log from deadlocked testhost">attachment 120953</a> <a href="attachment.cgi?id=120953&action=edit" title="Serial log from deadlocked testhost">[details]</a></span>
Serial log from deadlocked testhost
One of the following commits caused i915 boot deadlock with kernel
configuration:
CONFIG_DEBUG_RT_MUTEXES=y
CONFIG_DEBUG_MUTEXES=y
CONFIG_DEBUG_WW_MUTEX_SLOWPATH=y
89d0d1b6f0e9c3a6b90476bd115cfe1881646fd6 drm-intel-nightly:
2016y-01m-06d-10h-37m-17s UTC integration manifest
d93c037246104e403436ffe339bcb832185d0627 drm/i915: Sanitize watermarks after
hardware state readout (v4)
151268821e6f08956b28b6ff90fae187a5b230b8 drm/i915: Add extra paranoia to ILK
watermark calculations
ee91a15972cc70efa4d17b4bbdb61ff314528110 drm/i915: Convert
hsw_compute_linetime_wm to use in-flight state
0a8d8a8667c7e66f4fa2498be18d47f8b296b430 drm/i915: Setup clipped src/dest
coordinates during FB reconstruction (v2)
c4e42196d47969a8b0df5eae734bc86c8df7cf44 drm-intel-nightly:
2016y-01m-06d-10h-07m-52s UTC integration manifest
Platforms affected:
ILK (HP Elitebook 8440p)
SNB (Lenovo X220 Tablet)
IVB (Lenovo T430s)
HSW (Brixbox, Gigabyte i5k with GT2, Dell XPS12)
BDW (Intel UltraBook, Intel NUC i7)</pre>
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