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/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. ** 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/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. ** 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 Kernel Packages, which is subscribed to linux-oem-6.11 in Ubuntu. 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: In Progress 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. To manage notifications about this bug go to: https://bugs.launchpad.net/hwe-next/+bug/2101931/+subscriptions -- Mailing list: https://launchpad.net/~kernel-packages Post to : kernel-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~kernel-packages More help : https://help.launchpad.net/ListHelp
