** Changed in: linux (Ubuntu Lunar)
Status: Confirmed => Fix Committed
** Changed in: linux (Ubuntu Mantic)
Status: Confirmed => Fix Committed
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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 Committed
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 Committed
Status in linux-oem-6.5 source package in Jammy:
Fix Committed
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 Committed
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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