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/1896716

Title:
  [SRU][OEM-5.6]Fix AMD system hang after re-plugin USBC-DP dongle

Status in HWE Next:
  In Progress
Status in linux-oem-5.6 package in Ubuntu:
  In Progress
Status in linux-oem-5.6 source package in Focal:
  In Progress

Bug description:
  [Impact]
  After much times of re-plug USBC-DP dongle with external monitor,
  AMD laptop will hang.

  [Fix]
  AMD GPU driver set the wrong link setting to DP port.
  After initialize the DP setting, DP works fine.

  [Test Case]
  Verified on the target platform. no hang again.

  [Regression Potential]
  Low,
  Upstream fix in 5.7 kernel, Verified with positive results.
  Groovy already got this fix.

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