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the problem. Please test the kernel and update this bug with the
results. If the problem is solved, change the tag 'verification-needed-
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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.

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** Tags added: verification-needed-focal

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https://bugs.launchpad.net/bugs/1912676

Title:
   Fix regression introduced by codec PM change

Status in HWE Next:
  New
Status in OEM Priority Project:
  New
Status in linux package in Ubuntu:
  Incomplete
Status in linux-oem-5.10 package in Ubuntu:
  Invalid
Status in linux source package in Focal:
  Invalid
Status in linux-oem-5.10 source package in Focal:
  Fix Committed
Status in linux source package in Groovy:
  Confirmed
Status in linux-oem-5.10 source package in Groovy:
  Invalid

Bug description:
  [Impact]
  After the codec PM optimization, laptops with SOF may take very long to
  suspend. In addition to that, HDA may not be able to be runtim suspended
  again after resume from hibernation.

  [Fix]
  Prevent the SOF driver touches codec during system suspend, and properly
  refcount the PM usage counter.

  [Test]
  On an affected SOF system, it takes 5 mins to suspend.
  On another affected HDA system, S4 resume causes high power consumption
  becuase HDA controller can't be runtime suspended.

  Both issues are gone by applying these patches.

  [Where problems could occur]
  If somehow any laptop depends on the old behavior to work properly, this
  can break them. It's highly unlikely though.

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