https://lists.ubuntu.com/archives/kernel-team/2025-May/159993.html

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https://bugs.launchpad.net/bugs/2106783

Title:
  System hang while connecting dock during s2idle on AMD system

Status in HWE Next:
  New
Status in linux package in Ubuntu:
  Invalid
Status in linux-oem-6.11 package in Ubuntu:
  Invalid
Status in linux source package in Noble:
  Invalid
Status in linux-oem-6.11 source package in Noble:
  Fix Released
Status in linux source package in Plucky:
  In Progress
Status in linux-oem-6.11 source package in Plucky:
  Invalid

Bug description:
  [Impact]
  Some platforms are reported to have a failure that can occur when the
  EC SCI is asserted but the system doesn't wake up (such as no Notify()
  after processing EC events).  What happens is the APU rapidly enters
  and exits s0i3 multiple times.  On affected systems this triggers the
  over voltage protection (OVP) mechanism of the voltage regulator module
  (VRM). The system will be forced off, and to be reset the battery will
  need to be disconnected and reconnected.

  [Fix]
  AMD will submit the patches to the upstream soon.
  
https://lore.kernel.org/platform-driver-x86/70dfa642-4c97-4aaf-aa79-70127974f...@amd.com/T/#m174cfe2f4ec5893e39cff6994a93ebd499ec29e7

  Included in v6.15-rc5
  9f5595d5f03fd platform/x86/amd: pmc: Require at least 2.5 seconds between HW 
sleep cycles

  [Test]
  From the listed AMD machines, boot up and makes it enter suspended, and
  then plug the dock. The system should work normally without hang.
  DELL PRO 13 PLUS PB13255, DELL PRO 13 PLUS PB13255 360,
  DELL PRO 14 PLUS PB14255, DELL PRO 16 PLUS PB16255,
  DELL PRO 14 PC14255, DELL PRO 16 PC16255

  [Where problems could occur]
  Add sleep() in some cases should be safe and not possible to introduce 
regressions.

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