Public bug reported: 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://lore.kernel.org/lkml/[email protected] [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 ** Affects: linux-aws (Ubuntu) Importance: Undecided Assignee: Philip Cox (philcox) Status: New -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/2060992 Title: aws: Guest kernel support for clean boot on demand To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux-aws/+bug/2060992/+subscriptions -- ubuntu-bugs mailing list [email protected] https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
