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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 - [HSW] HDMI/DP audio doesn't work with DP MST"
href="https://bugs.freedesktop.org/show_bug.cgi?id=89895">89895</a>
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<th>Summary</th>
<td>[HSW] HDMI/DP audio doesn't work with DP MST
</td>
</tr>
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<th>Product</th>
<td>DRI
</td>
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<th>Version</th>
<td>unspecified
</td>
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<th>Hardware</th>
<td>x86-64 (AMD64)
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<th>OS</th>
<td>Linux (All)
</td>
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<th>Status</th>
<td>NEW
</td>
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<th>Severity</th>
<td>normal
</td>
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<th>Priority</th>
<td>medium
</td>
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<th>Component</th>
<td>DRM/Intel
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<th>Assignee</th>
<td>intel-gfx-bugs@lists.freedesktop.org
</td>
</tr>
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<th>Reporter</th>
<td>freedesktop@h.totakura.in
</td>
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<th>QA Contact</th>
<td>intel-gfx-bugs@lists.freedesktop.org
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<th>CC</th>
<td>intel-gfx-bugs@lists.freedesktop.org
</td>
</tr></table>
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<pre>Hi,
I hope this is the right section to report this bug; if not, please redirect me
to the appropriate one.
I am having trouble getting audio via HDMI/DP working. My setup has a Thinkpad
Ultra dock which has a Synaptics DP MST hub connected to a Dell U2415 monitor
via DP.
`aplay -l' reports:
**** List of PLAYBACK Hardware Devices ****
card 0: HDMI [HDA Intel HDMI], device 3: HDMI 0 [HDMI 0]
Subdevices: 0/1
Subdevice #0: subdevice #0
card 0: HDMI [HDA Intel HDMI], device 7: HDMI 1 [HDMI 1]
Subdevices: 1/1
Subdevice #0: subdevice #0
card 0: HDMI [HDA Intel HDMI], device 8: HDMI 2 [HDMI 2]
Subdevices: 1/1
Subdevice #0: subdevice #0
card 1: PCH [HDA Intel PCH], device 0: ALC3232 Analog [ALC3232 Analog]
Subdevices: 0/1
Subdevice #0: subdevice #0
So, the cards are being detected correctly. However, I do not see that the
monitor is being detected as connected as per ELD, even though I could use the
monitor for video.
$ ls -1 /proc/asound/card0
codec#0
eld#0.0
eld#0.1
eld#0.2
id
pcm3p
pcm7p
pcm8p
$ cat /proc/asound/card0/eld*
monitor_present 0
eld_valid 0
monitor_present 0
eld_valid 0
monitor_present 0
eld_valid 0
Could it be that the DP MST Hub in the dock is misbehaving or not transmitting
ELD? If so, how can I verify that?</pre>
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