Ubuntu
linux-aws package

  1. Noble (24.04)
  2. Bug #2060992
  3. Comment #0

Comment 0 for bug 2060992

Revision history for this message
Philip Cox (philcox) wrote : aws: Guest kernel support for clean boot on demand

SRU Justification:

[Impact]
The FACS field in the ACPI table is optional, but can be used communicate the hardware_signature field. If this field changes on resuming from a hibernation a clean reboot should happen rather than the resume from hibernation.

On hardware reduced platforms[0] this field may exist but it is not exposed currently.

[Fix]
Expose this field even on hardware reduced platforms.

https://<email address hidden>

[Test Plan]
AWS test.

[Where problems could occur]
If on hardware reduced platforms that incorrectly support/advertise the FACS field, hibernation may break if it returns a hardware signature that changes.

[0]: See Section 4.1 of the ACPI spec for info on hardware-reduced platforms.
https://uefi.org/htmlspecs/ACPI_Spec_6_4_html/04_ACPI_Hardware_Specification/ACPI_Hardware_Specification.html