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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 - [BAT SKL] WARN Unclaimed register detected (0x65f10) / gem_exec_suspend@basic-s4"
href="https://bugs.freedesktop.org/show_bug.cgi?id=96214">96214</a>
</td>
</tr>
<tr>
<th>Summary</th>
<td>[BAT SKL] WARN Unclaimed register detected (0x65f10) / gem_exec_suspend@basic-s4
</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>tiwai@suse.de
</td>
</tr>
<tr>
<th>Reporter</th>
<td>marius.c.vlad@intel.com
</td>
</tr>
<tr>
<th>QA Contact</th>
<td>intel-gfx-bugs@lists.freedesktop.org
</td>
</tr>
<tr>
<th>CC</th>
<td>chris@chris-wilson.co.uk, imre.deak@intel.com, intel-gfx-bugs@lists.freedesktop.org, ville.syrjala@linux.intel.com
</td>
</tr>
<tr>
<th>i915 platform</th>
<td>SKL
</td>
</tr>
<tr>
<th>i915 features</th>
<td>display/audio
</td>
</tr></table>
<p>
<div>
<pre>[ 467.894482] [drm] GuC firmware load skipped
[ 467.895388] ------------[ cut here ]------------
[ 467.895417] WARNING: CPU: 0 PID: 7882 at
drivers/gpu/drm/i915/intel_uncore.c:803 __unclaimed_reg_debug+0x63/0x70 [i915]
[ 467.895418] Unclaimed register detected after reading register 0x65f10
[ 467.895430] Modules linked in: snd_hda_intel i915 drm_kms_helper drm
snd_hda_codec_hdmi snd_hda_codec_conexant snd_hda_codec_generic snd_hda_codec
intel_rapl snd_hda_core xhci_pci xhci_hcd tpm_crb x86_pkg_temp_thermal
intel_powerclamp i2c_hid tpm_tis tpm rtsx_pci usbcore coretemp hid snd_hwdep
ghash_clmulni_intel mfd_core evdev joydev mei_me serio_raw mei snd_pcm
snd_timer processor video usb_common i2c_algo_bit battery button acpi_pad ac
wmi netconsole psmouse r8169 mii [last unloaded: drm]
[ 467.895432] CPU: 0 PID: 7882 Comm: kworker/u16:29 Tainted: G U
4.6.0+ #3
[ 467.895432] Hardware name: TOSHIBA SATELLITE P50-C/06F4
, BIOS 1.20 10/08/2015
[ 467.895435] Workqueue: events_unbound async_run_entry_fn
[ 467.895437] 0000000000000086 0000000076c67ed2 ffffffff814c4ec5
ffff880233b9fc50
[ 467.895438] 0000000000000000 ffffffff810f8f0e 0000000000065f10
ffff880233b9fca8
[ 467.895439] 0000000000000001 0000000000000001 0000000000000000
ffff880067610000
[ 467.895439] Call Trace:
[ 467.895443] [<ffffffff814c4ec5>] ? dump_stack+0x5c/0x77
[ 467.895444] [<ffffffff810f8f0e>] ? __warn+0xbe/0xe0
[ 467.895445] [<ffffffff810f8f8f>] ? warn_slowpath_fmt+0x5f/0x80
[ 467.895459] [<ffffffffa035f4f3>] ? __unclaimed_reg_debug+0x63/0x70 [i915]
[ 467.895472] [<ffffffffa0365266>] ? gen9_read32+0x346/0x380 [i915]
[ 467.895474] [<ffffffff8150ef30>] ? pci_pm_suspend_noirq+0x170/0x170
[ 467.895487] [<ffffffffa036b8a3>] ?
i915_audio_component_codec_wake_override+0x33/0xa0 [i915]
[ 467.895493] [<ffffffffa01e28d9>] ? snd_hdac_set_codec_wakeup+0x39/0x90
[snd_hda_core]
[ 467.895495] [<ffffffffa015f82a>] ? hda_intel_init_chip+0x12a/0x180
[snd_hda_intel]
[ 467.895497] [<ffffffffa01600f4>] ? azx_resume+0x94/0x160 [snd_hda_intel]
[ 467.895499] [<ffffffff815f5138>] ? dpm_run_callback+0x48/0x120
[ 467.895500] [<ffffffff815f5572>] ? device_resume+0x82/0x190
[ 467.895501] [<ffffffff815f5699>] ? async_resume+0x19/0x40
[ 467.895502] [<ffffffff81119ea5>] ? async_run_entry_fn+0x45/0x130
[ 467.895503] [<ffffffff811117ed>] ? process_one_work+0x15d/0x410
[ 467.895504] [<ffffffff81111aed>] ? worker_thread+0x4d/0x480
[ 467.895505] [<ffffffff81111aa0>] ? process_one_work+0x410/0x410
[ 467.895507] [<ffffffff8111792d>] ? kthread+0xcd/0xf0
[ 467.895509] [<ffffffff8179bf62>] ? ret_from_fork+0x22/0x40
[ 467.895510] [<ffffffff81117860>] ? kthread_create_on_node+0x190/0x190
[ 467.895511] ---[ end trace 9fd67d7ca6273eba ]---
Can be reproduced each time, by running:
$ tests/gem_exec_suspend --run-subtest basic-S4
Happens after the machine returns from suspend. Assigned to Takashi as it seems
to originate in snd.</pre>
</div>
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