Public bug reported:
[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.
** Affects: linux (Ubuntu)
Importance: Low
Status: Confirmed
** Affects: linux-oem-6.1 (Ubuntu)
Importance: Undecided
Status: Invalid
** Affects: linux-oem-6.5 (Ubuntu)
Importance: Undecided
Status: Invalid
** Affects: linux (Ubuntu Jammy)
Importance: Undecided
Status: New
** Affects: linux-oem-6.1 (Ubuntu Jammy)
Importance: Low
Status: Confirmed
** Affects: linux-oem-6.5 (Ubuntu Jammy)
Importance: Low
Status: Confirmed
** Affects: linux (Ubuntu Lunar)
Importance: Low
Status: Confirmed
** Affects: linux-oem-6.1 (Ubuntu Lunar)
Importance: Undecided
Status: Invalid
** Affects: linux-oem-6.5 (Ubuntu Lunar)
Importance: Undecided
Status: Invalid
** Affects: linux (Ubuntu Mantic)
Importance: Low
Status: Confirmed
** Affects: linux-oem-6.1 (Ubuntu Mantic)
Importance: Undecided
Status: Invalid
** Affects: linux-oem-6.5 (Ubuntu Mantic)
Importance: Undecided
Status: Invalid
** Also affects: linux (Ubuntu Mantic)
Importance: Undecided
Status: New
** Also affects: linux (Ubuntu Lunar)
Importance: Undecided
Status: New
** Changed in: linux (Ubuntu Lunar)
Status: New => Confirmed
** Changed in: linux (Ubuntu Mantic)
Status: New => Confirmed
** Changed in: linux (Ubuntu Lunar)
Importance: Undecided => Low
** Changed in: linux (Ubuntu Mantic)
Importance: Undecided => Low
** Also affects: linux-oem-6.1 (Ubuntu)
Importance: Undecided
Status: New
** Also affects: linux (Ubuntu Jammy)
Importance: Undecided
Status: New
** Also affects: linux-oem-6.1 (Ubuntu Jammy)
Importance: Undecided
Status: New
** Changed in: linux-oem-6.1 (Ubuntu Jammy)
Status: New => Confirmed
** Changed in: linux-oem-6.1 (Ubuntu Lunar)
Status: New => Invalid
** Changed in: linux-oem-6.1 (Ubuntu Mantic)
Status: New => Invalid
** Changed in: linux-oem-6.1 (Ubuntu Jammy)
Importance: Undecided => Low
** Also affects: linux-oem-6.5 (Ubuntu)
Importance: Undecided
Status: New
** Changed in: linux-oem-6.5 (Ubuntu Jammy)
Importance: Undecided => Low
** Changed in: linux-oem-6.5 (Ubuntu Jammy)
Status: New => Confirmed
** Changed in: linux-oem-6.5 (Ubuntu Lunar)
Status: New => Invalid
** Changed in: linux-oem-6.5 (Ubuntu Mantic)
Status: New => Invalid
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You received this bug notification because you are a member of Kernel
Packages, which is subscribed to linux in Ubuntu.
https://bugs.launchpad.net/bugs/2034504
Title:
Enable ASPM for NVMe behind VMD
Status in linux package in Ubuntu:
Confirmed
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:
Confirmed
Status in linux-oem-6.5 source package in Jammy:
Confirmed
Status in linux source package in Lunar:
Confirmed
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:
Confirmed
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.
To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/2034504/+subscriptions
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