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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 - WARNING: CPU: 2 PID: 150 at drivers/gpu/drm/i915/intel_dp.c:1062 intel_dp_aux_transfer"
href="https://bugs.freedesktop.org/show_bug.cgi?id=99098">99098</a>
</td>
</tr>
<tr>
<th>Summary</th>
<td>WARNING: CPU: 2 PID: 150 at drivers/gpu/drm/i915/intel_dp.c:1062 intel_dp_aux_transfer
</td>
</tr>
<tr>
<th>Product</th>
<td>DRI
</td>
</tr>
<tr>
<th>Version</th>
<td>XOrg git
</td>
</tr>
<tr>
<th>Hardware</th>
<td>x86-64 (AMD64)
</td>
</tr>
<tr>
<th>OS</th>
<td>Linux (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>rrs@researchut.com
</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>Created <span class=""><a href="attachment.cgi?id=128486" name="attach_128486" title="dmesg">attachment 128486</a> <a href="attachment.cgi?id=128486&action=edit" title="dmesg">[details]</a></span>
dmesg
* Steps to reproduce the issue.
Boot the kernel and the oops are seen in dmesg
* How often does the steps listed above trigger the issue?
Persistently, on every boot.
-- system architecture: ("uname -m")
-- kernel version: ("uname -r").
rrs@learner:~$ uname -a
Linux learner 4.9.0+ #42 SMP Tue Dec 13 17:30:09 IST 2016 x86_64 GNU/Linux
2016-12-15 / 20:22:52 ♒♒♒ ☺
-- Linux distribution:
Debian Unstable.
-- Machine or mother board model:
Intel Haswell.
rrs@learner:~$ lspci
00:02.0 VGA compatible controller: Intel Corporation Haswell-ULT Integrated
Graphics Controller (rev 0b)
00:03.0 Audio device: Intel Corporation Haswell-ULT HD Audio Controller (rev
0b)
00:14.0 USB controller: Intel Corporation 8 Series USB xHCI HC (rev 04)
00:16.0 Communication controller: Intel Corporation 8 Series HECI #0 (rev 04)
00:1b.0 Audio device: Intel Corporation 8 Series HD Audio Controller (rev 04)
00:1c.0 PCI bridge: Intel Corporation 8 Series PCI Express Root Port 4 (rev e4)
00:1d.0 USB controller: Intel Corporation 8 Series USB EHCI #1 (rev 04)
00:1f.0 ISA bridge: Intel Corporation 8 Series LPC Controller (rev 04)
00:1f.2 SATA controller: Intel Corporation 8 Series SATA Controller 1 [AHCI
mode] (rev 04)
00:1f.3 SMBus: Intel Corporation 8 Series SMBus Controller (rev 04)
01:00.0 Network controller: Realtek Semiconductor Co., Ltd. RTL8723BE PCIe
Wireless Network Adapter
2016-12-15 / 20:23:49 ♒♒♒ ☺
-- Display connector: (such as HDMI, DP, eDP, ...)
No external display connected.
rrs@learner:~$ sudo cat /sys/class/drm/card*/error
no error state collected
2016-12-15 / 20:20:07 ♒♒♒ ☺
Kernel Oops.
[ 1.999428] ------------[ cut here ]------------
[ 1.999451] WARNING: CPU: 2 PID: 150 at drivers/gpu/drm/i915/intel_dp.c:1062
intel_dp_aux_transfer+0x1ec/0x230 [i915]
[ 1.999451] WARN_ON(!msg->buffer != !msg->size)
[ 1.999452] Modules linked in:
[ 1.999453] crct10dif_pclmul crc32_pclmul crc32c_intel ghash_clmulni_intel
ahci libahci aesni_intel aes_x86_64 libata lrw gf128mul glue_helper ablk_helper
cryptd i915 i2c_algo_bit xhci_pci psmouse drm_kms_helper xhci_hcd syscopyarea
ehci_pci sysfillrect sysimgblt ehci_hcd fb_sys_fops scsi_mod usbcore drm fan
thermal i2c_hid hid i2c_core video sdhci_acpi sdhci mmc_core gpio_lynxpoint
fjes button
[ 1.999470] CPU: 2 PID: 150 Comm: kworker/u16:4 Tainted: G U W
4.9.0+ #42
[ 1.999471] Hardware name: LENOVO 20344/INVALID, BIOS 96CN31WW(V1.17)
07/21/2015
[ 1.999472] Workqueue: events_unbound async_run_entry_fn
[ 1.999473] 0000000000000000 ffffffffa772feb5 ffffc0260195fb30
0000000000000000
[ 1.999476] ffffffffa747505e ffffc0260195fc00 ffffc0260195fb88
0000000000000003
[ 1.999478] 00000000fffffffb 00000000ffffffb9 00000000fffffffb
ffffffffa74750df
[ 1.999480] Call Trace:
[ 1.999482] [<ffffffffa772feb5>] ? dump_stack+0x7d/0xb8
[ 1.999485] [<ffffffffa747505e>] ? __warn+0xbe/0xe0
[ 1.999487] [<ffffffffa74750df>] ? warn_slowpath_fmt+0x5f/0x80
[ 1.999489] [<ffffffffa74e1930>] ? __hrtimer_init+0x70/0x70
[ 1.999510] [<ffffffffc04a102c>] ? intel_dp_aux_transfer+0x1ec/0x230 [i915]
[ 1.999515] [<ffffffffc03a2c3a>] ? drm_dp_dpcd_access+0x7a/0x120
[drm_kms_helper]
[ 1.999520] [<ffffffffc03a2cf7>] ? drm_dp_dpcd_write+0x17/0x20
[drm_kms_helper]
[ 1.999540] [<ffffffffc049bf5b>] ? intel_dp_start_link_train+0x2cb/0x4c0
[i915]
[ 1.999559] [<ffffffffc049d3e8>] ? intel_dp_check_link_status+0xd8/0x110
[i915]
[ 1.999579] [<ffffffffc04a1d69>] ? intel_dp_detect+0x789/0xb80 [i915]
[ 1.999584] [<ffffffffc03a40e6>] ?
drm_helper_probe_single_connector_modes+0x3f6/0x4e0 [drm_kms_helper]
[ 1.999587] [<ffffffffa79da385>] ? _raw_spin_unlock_irqrestore+0x35/0x40
[ 1.999592] [<ffffffffc03b1fdc>] ? drm_fb_helper_initial_config+0xac/0x450
[drm_kms_helper]
[ 1.999614] [<ffffffffc0493b04>] ? intel_fbdev_initial_config+0x14/0x30
[i915]
[ 1.999616] [<ffffffffa7497dd2>] ? async_run_entry_fn+0x32/0x140
[ 1.999617] [<ffffffffa748ea4b>] ? process_one_work+0x1fb/0x490
[ 1.999618] [<ffffffffa748ed2a>] ? worker_thread+0x4a/0x500
[ 1.999620] [<ffffffffa748ece0>] ? process_one_work+0x490/0x490
[ 1.999622] [<ffffffffa7494e4e>] ? kthread+0xce/0xf0
[ 1.999623] [<ffffffffa7425701>] ? __switch_to+0x2c1/0x6c0
[ 1.999625] [<ffffffffa7494d80>] ? kthread_park+0x60/0x60
[ 1.999626] [<ffffffffa79daa1a>] ? ret_from_fork+0x2a/0x40
[ 1.999627] ---[ end trace ab3e43b405e66648 ]---</pre>
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