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<base href="https://bugs.freedesktop.org/" />
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<body><table border="1" cellspacing="0" cellpadding="8">
<tr>
<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW - i915_gem WARN_ON with Linux v3.19-7478-g796e1c55717e"
href="https://bugs.freedesktop.org/show_bug.cgi?id=89189">89189</a>
</td>
</tr>
<tr>
<th>Summary</th>
<td>i915_gem WARN_ON with Linux v3.19-7478-g796e1c55717e
</td>
</tr>
<tr>
<th>Product</th>
<td>DRI
</td>
</tr>
<tr>
<th>Version</th>
<td>DRI 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>jwboyer@fedoraproject.org
</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>
<p>
<div>
<pre>With Linus' latest tree as of this morning, I see the following backtrace on an
Intel NUC with a Celeron processor:
[ 3.753631] input: Video Bus as
/devices/LNXSYSTM:00/LNXSYBUS:00/PNP0A08:00/LNXVIDEO:00/input/input6
[ 3.757264] [drm] Initialized i915 1.6.0 20150130 for 0000:00:02.0 on minor
0
[ 3.757778] ------------[ cut here ]------------
[ 3.757817] WARNING: CPU: 0 PID: 57 at drivers/gpu/drm/i915/i915_gem.c:4525
i915_gem_free_object+0x3b6/0x4a0 [i915]()
[ 3.757820] WARN_ON(obj->frontbuffer_bits)
[ 3.757834] Modules linked in: i915 i2c_algo_bit drm_kms_helper drm video
sdhci_acpi sdhci mmc_core
[ 3.757838] CPU: 0 PID: 57 Comm: kworker/u4:2 Not tainted
3.20.0-0.rc0.git7.1.fc23.x86_64 #1
[ 3.757840] Hardware name:
\xffffffff\xffffffff\xffffffff\xffffffff\xffffffff\xffffffff\xffffffff\xffffffff\xffffffff\xffffffff\xffffffff\xffffffff\xffffffff\xffffffff\xffffffff\xffffffff\xffffffff\xffffffff\xffffffff\xffffffff\xffffffff\xffffffff\xffffffff\xffffffff\xffffffff\xffffffff\xffffffff\xffffffff\xffffffff\xffffffff\xffffffff\xffffffff\xffffffff
\xffffffff\xffffffff\xffffffff\xffffffff\xffffffff\xffffffff\xffffffff\xffffffff\xffffffff\xffffffff\xffffffff\xffffffff\xffffffff\xffffffff\xffffffff\xffffffff\xffffffff\xffffffff\xffffffff\xffffffff\xffffffff\xffffffff\xffffffff\xffffffff\xffffffff\xffffffff\xffffffff\xffffffff\xffffffff\xffffffff\xffffffff\xffffffff\xffffffff/DN2820FYK,
BIOS FYBYT10H.86A.0034.2014.0513.1413 05/13/2014
[ 3.757847] Workqueue: events_unbound async_run_entry_fn
[ 3.757853] 0000000000000000 00000000122bcbf6 ffff880233227728
ffffffff81876738
[ 3.757858] 0000000000000000 ffff880233227780 ffff880233227768
ffffffff810ab5da
[ 3.757863] ffff880236c01700 ffff88003f5a7c80 ffff88003f5a7c00
ffff88003f5a7d00
[ 3.757865] Call Trace:
[ 3.757871] [<ffffffff81876738>] dump_stack+0x4c/0x65
[ 3.757876] [<ffffffff810ab5da>] warn_slowpath_common+0x8a/0xc0
[ 3.757880] [<ffffffff810ab665>] warn_slowpath_fmt+0x55/0x70
[ 3.757908] [<ffffffffa0110a7e>] ? i915_vma_unbind+0x32e/0x3f0 [i915]
[ 3.757935] [<ffffffffa01126b6>] i915_gem_free_object+0x3b6/0x4a0 [i915]
[ 3.757951] [<ffffffffa00915c7>] drm_gem_object_free+0x27/0x40 [drm]
[ 3.757982] [<ffffffffa014cd65>] intel_user_framebuffer_destroy+0x75/0xa0
[i915]
[ 3.757996] [<ffffffffa009d4e0>] drm_framebuffer_free+0x50/0x60 [drm]
[ 3.758009] [<ffffffffa009e945>] drm_framebuffer_unreference+0x35/0x70
[drm]
[ 3.758023] [<ffffffffa009ea60>] drm_mode_set_config_internal+0xe0/0x120
[drm]
[ 3.758032] [<ffffffffa005e7d8>] restore_fbdev_mode+0xc8/0xf0
[drm_kms_helper]
[ 3.758041] [<ffffffffa0060849>]
drm_fb_helper_restore_fbdev_mode_unlocked+0x29/0x80 [drm_kms_helper]
[ 3.758048] [<ffffffffa00608c2>] drm_fb_helper_set_par+0x22/0x50
[drm_kms_helper]
[ 3.758079] [<ffffffffa016c25a>] intel_fbdev_set_par+0x1a/0x60 [i915]
[ 3.758085] [<ffffffff8149e518>] fbcon_init+0x588/0x610
[ 3.758090] [<ffffffff8153965c>] visual_init+0xbc/0x120
[ 3.758094] [<ffffffff8153c03e>] do_bind_con_driver+0x17e/0x3c0
[ 3.758098] [<ffffffff8153c7e4>] do_take_over_console+0xb4/0x1b0
[ 3.758103] [<ffffffff81499313>] do_fbcon_takeover+0x63/0xd0
[ 3.758106] [<ffffffff8149f06d>] fbcon_event_notify+0x6dd/0x7e0
[ 3.758111] [<ffffffff810d50f2>] notifier_call_chain+0x62/0x100
[ 3.758116] [<ffffffff810d53a1>] __blocking_notifier_call_chain+0x51/0x70
[ 3.758120] [<ffffffff810d53d6>] blocking_notifier_call_chain+0x16/0x20
[ 3.758124] [<ffffffff814a510b>] fb_notifier_call_chain+0x1b/0x20
[ 3.758127] [<ffffffff814a75c2>] register_framebuffer+0x222/0x370
[ 3.758136] [<ffffffffa0060b54>] drm_fb_helper_initial_config+0x264/0x3c0
[drm_kms_helper]
[ 3.758167] [<ffffffffa016d58b>] intel_fbdev_initial_config+0x1b/0x20
[i915]
[ 3.758171] [<ffffffff810d79da>] async_run_entry_fn+0x4a/0x150
[ 3.758175] [<ffffffff810ccc25>] process_one_work+0x215/0x860
[ 3.758178] [<ffffffff810ccb8e>] ? process_one_work+0x17e/0x860
[ 3.758182] [<ffffffff810cd36b>] ? worker_thread+0xfb/0x490
[ 3.758186] [<ffffffff810cd2db>] worker_thread+0x6b/0x490
[ 3.758190] [<ffffffff810cd270>] ? process_one_work+0x860/0x860
[ 3.758193] [<ffffffff810d378f>] kthread+0x11f/0x140
[ 3.758198] [<ffffffff810e9a05>] ? local_clock+0x25/0x30
[ 3.758203] [<ffffffff810d3670>] ? kthread_create_on_node+0x250/0x250
[ 3.758207] [<ffffffff8188077c>] ret_from_fork+0x7c/0xb0
[ 3.758211] [<ffffffff810d3670>] ? kthread_create_on_node+0x250/0x250
[ 3.758214] ---[ end trace 52d7387bdd97e9bd ]---
[ 3.806995] Console: switching to colour frame buffer device 128x48
[ 3.811526] i915 0000:00:02.0: fb0: inteldrmfb frame buffer device
[ 3.811529] i915 0000:00:02.0: registered panic notifier</pre>
</div>
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