This bug is missing log files that will aid in diagnosing the problem.
While running an Ubuntu kernel (not a mainline or third-party kernel)
please enter the following command in a terminal window:

apport-collect 1971417

and then change the status of the bug to 'Confirmed'.

If, due to the nature of the issue you have encountered, you are unable
to run this command, please add a comment stating that fact and change
the bug status to 'Confirmed'.

This change has been made by an automated script, maintained by the
Ubuntu Kernel Team.

** Changed in: linux (Ubuntu)
       Status: New => Incomplete

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https://bugs.launchpad.net/bugs/1971417

Title:
  Fix REG_WAIT timeout for Yellow Carb

Status in HWE Next:
  New
Status in linux package in Ubuntu:
  Incomplete

Bug description:
  [Impact]
  During hotplug built-in hdmi, the error message show up.
  #REG_WAIT timeout for yellow Carb

  [Fix]
  This tends to take miliseconds in certain scenarios and we'd rather not
  wait that long. Due to how this interacts with det size update and
  locking waiting should not be necessary as compbuf updates before
  unlock.
      
  Add a watch for config error instead as that is something we actually do
  care about.

  [Test Case]
  1. Plug and unplug hdmi 
  2. cant get the error message in dmesg.

  [Where problems could occur]
  Low

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