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Issue 729221 link

Starred by 1 user
Status: Untriaged
Owner: ----
Cc:
ka...@chromium.org
sontis@chromium.org
█ helenzhang@chromium.org
█ rjahagir@chromium.org
█ itspeter@chromium.org
cychiang@chromium.org
chromeos-audio-bugs@google.com
Components:
EstimatedDays: ----
NextAction: ----
OS: Chrome
Pri: 2
Type: Bug



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[Hana] Background audio noise from USB headphones when connected to HooToo shuttle (type C connector)

Project Member Reported by pgangishetty@chromium.org, Jun 2 2017 
Chrome Version: 60.0.3112.10
Platform: 9592.5.0 (Official Build) dev-channel hana

What steps will reproduce the problem?
(1)Sign in to Device
(2)Play some audio (YouTube audio was playing)
(3)Connect USB headphones,2 other USB peripherals(my case - keyboard and mouse connected) and HDMI to HooToo Shuttle (type c multi port connector) 
(4)Plug in the HooToo shuttle to the device


What is the expected result?
Audio plays from USB headphones without any background noise

What happens instead?
1. Background noise is heard from the headphones.  
2. Unplug USB's other than headphones from the HooToo shuttle, no background noise is heard and audio plays fine
3. Now plug all the peripherals back to HooToo shuttle and plug the multi-port connector to the device, background noise is heard again.  

Please use labels and text to provide additional information.

Logs and screenshot attached.


For graphics-related bugs, please copy/paste the contents of the about:gpu
page at the end of this report.

Comment 2 by ka...@chromium.org, Jun 2 2017 

 pgangishetty@, can you try few other typeC adapters/docks we have in inventory?

Comment 3 by pgangishetty@chromium.org, Jun 2 2017 

Tried with few combinations and observations are below:

1. Reproducible with 3 of the HooToo shuttles on 2 Hana boards and with different USB headphones
2. Not reproducible with other multi USB type C hub
3. Not reproducible with HooToo shuttle on Pyro board

Comment 4 by pgangishetty@chromium.org, Jun 2 2017

Labels: -Pri-3 Pri-2
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