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From:   bugzilla-daemon@bugzilla.kernel.org
To:     linux-usb@vger.kernel.org
Subject: [Bug 208353] New: Distorted Audio Output Through USB C Docking
 Station
Date:   Sun, 28 Jun 2020 15:19:06 +0000
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X-Bugzilla-Component: USB
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https://bugzilla.kernel.org/show_bug.cgi?id=208353

            Bug ID: 208353
           Summary: Distorted Audio Output Through USB C Docking Station
           Product: Drivers
           Version: 2.5
    Kernel Version: 5.4.49
          Hardware: All
                OS: Linux
              Tree: Mainline
            Status: NEW
          Severity: normal
          Priority: P1
         Component: USB
          Assignee: drivers_usb@kernel-bugs.kernel.org
          Reporter: pbui@kernel.bx612.space
        Regression: No

Created attachment 289909
  --> https://bugzilla.kernel.org/attachment.cgi?id=289909&action=edit
Output of alsa-info.sh

With kernel 5.4.49 the audio output through my Dell WD19 Docking station is now
laggy and distorted (sounds like only bass frequencies are emitted). 
Previously, audio output through the dock worked just fine with all versions of
4.19.x and 5.4.x.

After looking through the changelog for 5.4.49, I was able to locate the
offending patch:

https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/patch/?id=aba41867dd66939d336fdf604e4d73b805d8039f

Reverting this patch allows audio to play normally through my docking station.

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