https://bugzilla.kernel.org/show_bug.cgi?id=207015
Zhang Rui (rui.zh...@intel.com) changed: What |Removed |Added ---------------------------------------------------------------------------- Status|NEW |NEEDINFO CC| |rui.zh...@intel.com --- Comment #1 from Zhang Rui (rui.zh...@intel.com) --- I think kernel does not enumerate the Fixed power button device when PWR_BUTTON is set to 1, so we're okay in this case. But according to the ACPI spec about "PWR_BUTTON", "A zero indicates the power button is handled as a fixed feature programming model; a one indicates the power button is handled as a control method device. If the system does not have a power button, this value would be “1” and no power button device would be present. Independent of the value of this field, the presence of a power button device in the namespace indicates to OSPM that the power button is handled as a control method device." So when PWR_BUTTON is 0, and there is control method power button device in ACPI namespace, we should enumerate and probe both, right? I have the impression that in some cases, control method power button is needed, because the power button event is SCI -> EC GPE -> ACPI Notify(PWRB), but I'm not sure if FADT PWR_BUTTON flag is set to 1 or not in this case. -- You are receiving this mail because: You are watching the assignee of the bug. _______________________________________________ acpi-bugzilla mailing list acpi-bugzilla@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/acpi-bugzilla