This bug is awaiting verification that the linux/6.5.0-16.16 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-mantic-linux' to 'verification-done-mantic-linux'.
If the problem still exists, change the tag 'verification-needed-mantic-
linux' to 'verification-failed-mantic-linux'.


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: kernel-spammed-mantic-linux-v2 verification-needed-mantic-linux

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You received this bug notification because you are a member of Kernel
Packages, which is subscribed to linux-oem-6.5 in Ubuntu.
https://bugs.launchpad.net/bugs/2042912

Title:
  System hang after unplug/plug DP monitor with AMD W7500 card

Status in HWE Next:
  New
Status in linux package in Ubuntu:
  In Progress
Status in linux-oem-6.1 package in Ubuntu:
  Invalid
Status in linux-oem-6.5 package in Ubuntu:
  Invalid
Status in linux source package in Jammy:
  Invalid
Status in linux-oem-6.1 source package in Jammy:
  Fix Released
Status in linux-oem-6.5 source package in Jammy:
  Fix Released
Status in linux source package in Mantic:
  Fix Committed
Status in linux-oem-6.1 source package in Mantic:
  Invalid
Status in linux-oem-6.5 source package in Mantic:
  Invalid
Status in linux source package in Noble:
  In Progress
Status in linux-oem-6.1 source package in Noble:
  Invalid
Status in linux-oem-6.5 source package in Noble:
  Invalid

Bug description:
  [Impact]
  System hangs and no external output after unplug/plug DP monitor. (AMD Radeon 
Pro W7500)
  Observed a bunch of [Hardware Error] messages and finally amdgpu crashed.

  [Fix]
  AMD provides a patch to fix the issue
  https://www.spinics.net/lists/amd-gfx/msg99737.html

  which is included in v6.7-rc1
  7f3e6b840fa8 drm/amd/pm: Fix error of MACO flag setting code

  [Testcase]
  1. Connect the DUT to an external DP monitor via one of the ports on the AMD 
graphics card
  2. Boot into Ubuntu
  3. Unplug the DP cable from the DUT
  4. Wait for 30 seconds
  5. Replug in the DP cable
  6. Make sure the system doesn't hang and the external DP monitor works

  [Where probles could occur]
  The patch make sure MACO is supported only if BACO is supported. It creates a 
stricter rule for MACO to avoid MACO is enabled with BACO supports. It should 
be safe to apply stricter rules to enable features.

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