This bug is awaiting verification that the linux-oem-6.11/6.11.0-1018.18
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-noble-linux-oem-6.11' to 'verification-done-
noble-linux-oem-6.11'. If the problem still exists, change the tag
'verification-needed-noble-linux-oem-6.11' to 'verification-failed-
noble-linux-oem-6.11'.


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-noble-linux-oem-6.11-v2 
verification-needed-noble-linux-oem-6.11

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https://bugs.launchpad.net/bugs/2101931

Title:
  Dell machine cannot wake up from suspend via KB

Status in HWE Next:
  New
Status in linux package in Ubuntu:
  In Progress
Status in linux-oem-6.11 package in Ubuntu:
  Invalid
Status in linux source package in Noble:
  In Progress
Status in linux-oem-6.11 source package in Noble:
  Fix Committed
Status in linux source package in Oracular:
  In Progress
Status in linux-oem-6.11 source package in Oracular:
  Invalid
Status in linux source package in Plucky:
  In Progress
Status in linux-oem-6.11 source package in Plucky:
  Invalid

Bug description:
  [Impact]
  On some systems when the system is put to sleep pressing the ACPI power
  button will cause the EC SCI to try to wake the system by a Notify(DEV, 0x2)
  with an intention to wake the system up from suspend.

  This behavior matches the ACPI specification in ACPI 6.4 section
  4.8.3.1.1.2 which describes that the AML handler would generate a Notify()
  with a code of 0x2 to indicate it was responsible for waking the system.

  This currently doesn't work because acpi_button_add() only configured
  `ACPI_DEVICE_NOTIFY` which means that device handler notifications
  0x80 through 0xFF are handled.

  [Fix]
  To fix the wakeups on such systems, adjust the ACPI button handler to
  use `ACPI_ALL_NOTIFY` which will handle all events 0x00 through 0x7F.
  
https://patchwork.kernel.org/project/linux-acpi/patch/20250303212719.4153485-1-supe...@kernel.org/

  Included in linux-next
  39bc24ceb09d ACPI: button: Install notifier for system events as well

  [Test]
  The issue could be found on Dell Pro 14 notebook.
  Verify the system could be waken up by the power button.

  [Where problems could occur]
  ACPI button driver submit more events to wake up the system, it could lead to 
unexpected wake up if the BIOS sends unexpected events during suspend.

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