Public bug reported: [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/[email protected]/ 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. ** Affects: hwe-next Importance: Undecided Status: New ** Affects: linux (Ubuntu) Importance: Undecided Assignee: AceLan Kao (acelankao) Status: In Progress ** Affects: linux-oem-6.11 (Ubuntu) Importance: Undecided Status: Invalid ** Affects: linux (Ubuntu Noble) Importance: Undecided Assignee: AceLan Kao (acelankao) Status: In Progress ** Affects: linux-oem-6.11 (Ubuntu Noble) Importance: Undecided Assignee: AceLan Kao (acelankao) Status: In Progress ** Affects: linux (Ubuntu Oracular) Importance: Undecided Assignee: AceLan Kao (acelankao) Status: In Progress ** Affects: linux-oem-6.11 (Ubuntu Oracular) Importance: Undecided Status: Invalid ** Affects: linux (Ubuntu Plucky) Importance: Undecided Assignee: AceLan Kao (acelankao) Status: In Progress ** Affects: linux-oem-6.11 (Ubuntu Plucky) Importance: Undecided Status: Invalid ** Tags: dwtn jira-dwtn-5 oem-priority ** Also affects: linux-oem-6.11 (Ubuntu Noble) Importance: Undecided Status: New ** Also affects: linux-oem-6.11 (Ubuntu Oracular) Importance: Undecided Status: New ** Also affects: linux-oem-6.11 (Ubuntu Plucky) Importance: Undecided Status: New ** Description changed: [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/[email protected]/ + 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. ** Tags added: dwtn jira-dwtn-5 oem-priority ** Also affects: linux (Ubuntu) Importance: Undecided Status: New ** Changed in: linux-oem-6.11 (Ubuntu Oracular) Status: New => Invalid ** Changed in: linux-oem-6.11 (Ubuntu Plucky) Status: New => Invalid ** Changed in: linux-oem-6.11 (Ubuntu Noble) Status: New => In Progress ** Changed in: linux (Ubuntu Noble) Status: New => In Progress ** Changed in: linux (Ubuntu Oracular) Status: New => In Progress ** Changed in: linux (Ubuntu Plucky) Status: New => In Progress ** Changed in: linux (Ubuntu Noble) Assignee: (unassigned) => AceLan Kao (acelankao) ** Changed in: linux (Ubuntu Oracular) Assignee: (unassigned) => AceLan Kao (acelankao) ** Changed in: linux (Ubuntu Plucky) Assignee: (unassigned) => AceLan Kao (acelankao) ** Changed in: linux-oem-6.11 (Ubuntu Noble) Assignee: (unassigned) => AceLan Kao (acelankao) -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/2101931 Title: Dell machine cannot wake up from suspend via KB To manage notifications about this bug go to: https://bugs.launchpad.net/hwe-next/+bug/2101931/+subscriptions -- ubuntu-bugs mailing list [email protected] https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
