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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 - [CI] igt@gem_eio@in-flight-internal - dmesg-warn - WARNING: bad unlock balance detected!"
href="https://bugs.freedesktop.org/show_bug.cgi?id=106003">106003</a>
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</tr>
<tr>
<th>Summary</th>
<td>[CI] igt@gem_eio@in-flight-internal - dmesg-warn - WARNING: bad unlock balance detected!
</td>
</tr>
<tr>
<th>Product</th>
<td>DRI
</td>
</tr>
<tr>
<th>Version</th>
<td>XOrg git
</td>
</tr>
<tr>
<th>Hardware</th>
<td>Other
</td>
</tr>
<tr>
<th>OS</th>
<td>All
</td>
</tr>
<tr>
<th>Status</th>
<td>NEW
</td>
</tr>
<tr>
<th>Severity</th>
<td>normal
</td>
</tr>
<tr>
<th>Priority</th>
<td>medium
</td>
</tr>
<tr>
<th>Component</th>
<td>DRM/Intel
</td>
</tr>
<tr>
<th>Assignee</th>
<td>intel-gfx-bugs@lists.freedesktop.org
</td>
</tr>
<tr>
<th>Reporter</th>
<td>martin.peres@free.fr
</td>
</tr>
<tr>
<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><a href="https://intel-gfx-ci.01.org/tree/drm-tip/drmtip_7/fi-gdg-551/igt@gem_eio@in-flight-internal.html">https://intel-gfx-ci.01.org/tree/drm-tip/drmtip_7/fi-gdg-551/igt@gem_eio@in-flight-internal.html</a>
[ 241.790215] =====================================
[ 241.790220] WARNING: bad unlock balance detected!
[ 241.790227] 4.16.0-rc6-g94f5d9189e61-drmtip_7+ #1 Tainted: G U
[ 241.790233] -------------------------------------
[ 241.790239] kworker/0:1/17 is trying to release lock (crtc_ww_class_acquire)
at:
[ 241.790256] [<ffffffffb15c7360>] drm_modeset_acquire_fini+0x0/0x60
[ 241.790261] but there are no more locks to release!
[ 241.790266]
other info that might help us debug this:
[ 241.790274] 2 locks held by kworker/0:1/17:
[ 241.790278] #0: ((wq_completion)"events_long"){+.+.}, at:
[<000000002f5bee42>] process_one_work+0x19e/0x680
[ 241.790294] #1:
((work_completion)(&(&i915->gpu_error.hangcheck_work)->work)){+.+.}, at:
[<000000002f5bee42>] process_one_work+0x19e/0x680
[ 241.790309]
stack backtrace:
[ 241.790316] CPU: 0 PID: 17 Comm: kworker/0:1 Tainted: G U
4.16.0-rc6-g94f5d9189e61-drmtip_7+ #1
[ 241.790325] Hardware name: Dell Inc. OptiPlex GX280 /0G8310, BIOS A04
02/09/2005
[ 241.790455] Workqueue: events_long i915_hangcheck_elapsed [i915]
[ 241.790464] Call Trace:
[ 241.790474] dump_stack+0x67/0x95
[ 241.790482] ? drm_modeset_backoff+0x1b0/0x1b0
[ 241.790490] print_unlock_imbalance_bug+0xd2/0xe0
[ 241.790498] ? drm_modeset_backoff+0x1b0/0x1b0
[ 241.790504] lock_release+0x23e/0x300
[ 241.790512] drm_modeset_acquire_fini+0x16/0x60
[ 241.790589] intel_finish_reset+0x72/0x160 [i915]
[ 241.790647] i915_reset_device+0x1e9/0x240 [i915]
[ 241.790705] ? __intel_get_crtc_scanline+0x1c0/0x1c0 [i915]
[ 241.790713] ? work_on_cpu_safe+0x50/0x50
[ 241.790771] i915_handle_error+0x1f2/0x470 [i915]
[ 241.790782] ? scnprintf+0x3a/0x70
[ 241.790855] i915_hangcheck_elapsed+0x313/0x4a0 [i915]
[ 241.790865] process_one_work+0x224/0x680
[ 241.790873] worker_thread+0x35/0x380
[ 241.790880] ? process_one_work+0x680/0x680
[ 241.790887] kthread+0x119/0x130
[ 241.790893] ? _kthread_create_on_node+0x30/0x30
[ 241.790901] ret_from_fork+0x3a/0x50
[ 241.815931] i915 0000:00:02.0: Resetting chip for Manually set wedged engine
mask = ffffffffffffffff
[ 241.911720] Setting dangerous option reset - tainting kernel
[ 241.928002] i915 0000:00:02.0: Resetting chip for Manually set wedged engine
mask = ffffffffffffffff
This is from ~2 weeks ago, so it may have been fixed already!</pre>
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