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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW - Got call trace message "eDP powered off while attempting aux channel communication" while boot up"
href="https://bugs.freedesktop.org/show_bug.cgi?id=112051">112051</a>
</td>
</tr>
<tr>
<th>Summary</th>
<td>Got call trace message "eDP powered off while attempting aux channel communication" while boot up
</td>
</tr>
<tr>
<th>Product</th>
<td>DRI
</td>
</tr>
<tr>
<th>Version</th>
<td>unspecified
</td>
</tr>
<tr>
<th>Hardware</th>
<td>x86-64 (AMD64)
</td>
</tr>
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<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>not set
</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>cyrus.lien@canonical.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>
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<pre>Created <span class=""><a href="attachment.cgi?id=145771" name="attach_145771" title="dmesg">attachment 145771</a> <a href="attachment.cgi?id=145771&action=edit" title="dmesg">[details]</a></span>
dmesg
Bug description:
Got the call trace message during system boot up.
[ 2.999233] ------------[ cut here ]------------
[ 2.999238] eDP powered off while attempting aux channel communication.
[ 2.999338] WARNING: CPU: 2 PID: 296 at
drivers/gpu/drm/i915/display/intel_dp.c:1148 intel_dp_aux_xfer+0x767/0x900
[i915]
[ 2.999341] Modules linked in: i915(+) i2c_algo_bit drm_kms_helper
syscopyarea sysfillrect sysimgblt fb_sys_fops drm r8169 ahci realtek libahci
wmi video
[ 2.999350] CPU: 2 PID: 296 Comm: systemd-udevd Not tainted
5.3.0-997-generic #201910072204
[ 2.999352] Hardware name: Dell Inc. OptiPlex 3280 AIO/, BIOS 99.00.08
10/01/2019
[ 2.999391] RIP: 0010:intel_dp_aux_xfer+0x767/0x900 [i915]
[ 2.999394] Code: e8 ee b5 ff ff 84 c0 0f 85 ec f9 ff ff 48 8b 7d 80 e8 5d
b6 ff ff 84 c0 0f 85 db f9 ff ff 48 c7 c7 50 22 5d c0 e8 84 ea b5 d1 <0f> 0b 48
8b 7d 80 48 8d 75 90 4c 8d ab a8 07 00 00 e8 63 b4 ff ff
[ 2.999398] RSP: 0018:ffffb7000040b5b8 EFLAGS: 00010286
[ 2.999400] RAX: 0000000000000000 RBX: ffff9bfa9dc20000 RCX:
0000000000000396
[ 2.999402] RDX: 0000000000000001 RSI: 0000000000000082 RDI:
0000000000000246
[ 2.999404] RBP: ffffb7000040b698 R08: 0000000000000396 R09:
0000000000000019
[ 2.999406] R10: 000000000000072e R11: ffffb7000040b420 R12:
0000000000000004
[ 2.999408] R13: ffff9bfa9fbca120 R14: ffff9bfa9dc20000 R15:
ffff9bfa9dc207a8
[ 2.999410] FS: 00007f0d8613a680(0000) GS:ffff9bfaaec80000(0000)
knlGS:0000000000000000
[ 2.999412] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 2.999414] CR2: 00007ffca955ae58 CR3: 000000041e67e002 CR4:
00000000003606e0
[ 2.999416] DR0: 0000000000000000 DR1: 0000000000000000 DR2:
0000000000000000
[ 2.999418] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7:
0000000000000400
[ 2.999420] Call Trace:
[ 2.999425] ? vprintk_default+0x29/0x50
[ 2.999464] intel_dp_aux_transfer+0x15e/0x220 [i915]
[ 2.999472] drm_dp_dpcd_access+0x72/0x110 [drm_kms_helper]
[ 2.999478] drm_dp_dpcd_read+0x33/0xc0 [drm_kms_helper]
[ 2.999515] intel_dp_read_dpcd+0x41/0x130 [i915]
[ 2.999551] intel_edp_init_connector+0x136/0x540 [i915]
[ 2.999587] intel_dp_init_connector+0x47f/0x870 [i915]
[ 2.999623] intel_ddi_init+0x425/0x590 [i915]
[ 2.999660] intel_setup_outputs+0x8e4/0xc60 [i915]
System environment:
-- chipset: CML-S
-- system architecture: 64-bit
-- xf86-video-intel: xserver-xorg-video-intel-hwe-18.04
2:2.99.917+git20171229-1ubuntu1~18.04.1
-- xserver: xserver-xorg-core-hwe-18.04 2:1.20.4-1ubuntu3~18.04.2
-- mesa: 19.0.8-0ubuntu0~18.04.3
-- libdrm: 2.4.99-1
-- kernel: 5.2.9-arch1-1-ARCH
-- Linux distribution: Ubuntu
-- Machine or mobo model: Dell Inc. OptiPlex 3280 AIO
-- Display connector: eDP-1</pre>
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