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    <head>
      <base href="https://bugs.freedesktop.org/">
    </head>
    <body><table border="1" cellspacing="0" cellpadding="8">
        <tr>
          <th>Bug ID</th>
          <td><a class="bz_bug_link 
          bz_status_NEW "
   title="NEW - DP audio not work on KBL(regression issue)"
   href="https://bugs.freedesktop.org/show_bug.cgi?id=104093">104093</a>
          </td>
        </tr>

        <tr>
          <th>Summary</th>
          <td>DP audio not work on KBL(regression issue)
          </td>
        </tr>

        <tr>
          <th>Product</th>
          <td>DRI
          </td>
        </tr>

        <tr>
          <th>Version</th>
          <td>DRI git
          </td>
        </tr>

        <tr>
          <th>Hardware</th>
          <td>x86 (IA32)
          </td>
        </tr>

        <tr>
          <th>OS</th>
          <td>Linux (All)
          </td>
        </tr>

        <tr>
          <th>Status</th>
          <td>NEW
          </td>
        </tr>

        <tr>
          <th>Severity</th>
          <td>major
          </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>quanxian.wang@intel.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>kernel 4.9 works.
But from 4.10-rc1 failed
upstream 4.13 failed.

Including KBL-S/U/H/Y

HDA audio works
Legacy audio works
DP audio failed.

you can get the Ubuntu 17.10 release. It has the 4.13 kernel.
<a href="http://cdimage.ubuntu.com/ubuntu/daily-live/current/">http://cdimage.ubuntu.com/ubuntu/daily-live/current/</a>

It is easy to reproduce.

Reproduce Steps:
1)connector DP monitor with KBL
2) and run the command
speaker-test -t wav -c 2 -Dplughw:0,8
for HDA with plughw:0.7 (works)
for legacy with plughw:0.0 (works)
=== Machine Information including BIOS ==
Platform info:
OS: Ubuntu 17.04
Kernel: 4.10.0-9-generic
KBL-S
Processor: Kabylake DT Intel(R) Core(TM) i5-7600 CPU @ 3.50GHz, B0/S0/M0
Stepping, GT2(0x5912)
Bios: KBLSE2R1.R00.X063.P00.1610281021
KBL-H
Processor: Kabylake Halo, i5-7300HQ 2.5GHz, B0/S0/M0 Stepping, GT2(0x591B)
Bios: KBLSE2R1.R00.X063.P00.1610281021
KBL-U
Processor: KabyLake ULT, i7-7600U, 2.80GHz, H0/J0 Stepping, GT2 
Bios: KBLSE2R1.R00.X063.P00.1610281021
Details:
1. The host connect the DP port to display, and connect the headset to the DP
displayer.
2. Use the command "alsamixer " to adjust the audio to the best.
3. Use the command "aplay -l" to get the List of PLAYBACK Hardware Devices.
4. Use the command "speaker-test -c2 -t wav -Dhw:0,*" to check the audio, bus
the headset cannot hear any sound.
5. Use "cat /proc/asound/card0/eld#2.*" to get the displayer info, but cannot
get any info.

Currently seems APL-I not works too.</pre>
        </div>
      </p>


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