This bug is awaiting verification that the linux/6.2.0-36.37 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-lunar-linux' to 'verification-done-lunar-linux'. If
the problem still exists, change the tag 'verification-needed-lunar-
linux' to 'verification-failed-lunar-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-lunar-linux-v2 verification-needed-lunar-linux

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You received this bug notification because you are a member of Kernel
Packages, which is subscribed to linux-oem-6.1 in Ubuntu.
https://bugs.launchpad.net/bugs/2034504

Title:
  Enable ASPM for NVMe behind VMD

Status in OEM Priority Project:
  New
Status in linux package in Ubuntu:
  Fix Released
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:
  New
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 Lunar:
  Fix Committed
Status in linux-oem-6.1 source package in Lunar:
  Invalid
Status in linux-oem-6.5 source package in Lunar:
  Invalid
Status in linux source package in Mantic:
  Fix Released
Status in linux-oem-6.1 source package in Mantic:
  Invalid
Status in linux-oem-6.5 source package in Mantic:
  Invalid

Bug description:
  [Impact]
  ASPM of NVMe behind VMD is not enabled when BIOS FADT doesn't allow ASPM to 
be modified.
  That causes higher overall power consumption.

  [Fix]
  Allow ASPM to be enabled.
  While at this, remove old cruft that can interfere upstream VMD driver.

  [Test]
  Check the value of `/sys/kernel/debug/pmc_core/slp_s0_residency_usec`. Now 
system can reach deepest power saving state during sleep.

  [Where problems could occur]
  Some NVMe may have I/O issue when ASPM is enabled. But for this scenario the 
issue will also appear when VMD is disabled.

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