This bug is awaiting verification that the kernel in -proposed solves
the problem. Please test the kernel and update this bug with the
results. If the problem is solved, change the tag 'verification-needed-
focal' to 'verification-done-focal'. If the problem still exists, change
the tag 'verification-needed-focal' to 'verification-failed-focal'.

If verification is not done by 5 working days from today, this fix will
be dropped from the source code, and this bug will be closed.

See https://wiki.ubuntu.com/Testing/EnableProposed for documentation how
to enable and use -proposed. Thank you!


** Tags added: verification-needed-focal

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You received this bug notification because you are a member of Kernel
Packages, which is subscribed to linux-oem-5.6 in Ubuntu.
https://bugs.launchpad.net/bugs/1904430

Title:
  Fix AMD GFX where no HDMI audio when hotplugging different monitors

Status in HWE Next:
  New
Status in linux-oem-5.6 package in Ubuntu:
  Invalid
Status in linux-oem-5.6 source package in Focal:
  Fix Committed

Bug description:
  [Impact]
  Hotplugging different monitors on different ports makes HDMI audio
  disappears.

  [Fix] 
  Make sure new EDID is added.

  [Test case]
  Boot up with a HDMI monitor with audio output, unplug the monitor and
  plug another monitor without speaker and without audio jack.
  Then plug back the original monitor.

  With the patch applied, there's still HDMI audio output from the
  original monitor.

  [Where problems could occur]
  If the EDID is valid, the driver does the correct thing.
  If the EDID is invalid, then the driver spends a bit more time setting
  up EDID, without doing any harm.

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