https://bugzilla.kernel.org/show_bug.cgi?id=199393
--- Comment #1 from Tristian Celestin (tristian.celes...@outlook.com) --- I narrowed down what I believe to be the cause of the difference, but I don't know how to proceed. The acpi driver file in platform/acpi/sleep.c has a method, lps0_device_attach(...) that determines whether a device should be set to s2idle by default. The relevant block is: if (out_obj && out_obj->type == ACPI_TYPE_BUFFER) { char bitmask = *(char *)out_obj->buffer.pointer; if ((bitmask & ACPI_LPS0_PLATFORM_MASK) == ACPI_LPS0_PLATFORM_MASK || (bitmask & ACPI_LPS0_SCREEN_MASK) == ACPI_LPS0_SCREEN_MASK) { lps0_dsm_func_mask = bitmask; lps0_device_handle = adev->handle; /* * Use suspend-to-idle by default if the default * suspend mode was not set from the command line. */ if (mem_sleep_default > PM_SUSPEND_MEM) mem_sleep_current = PM_SUSPEND_TO_IDLE; } I placed a bunch of acpi_handle_debug statements prior to the bitmask check: acpi_handle_debug(adev->handle, "bitmask is 0x%x\n", bitmask); acpi_handle_debug(adev->handle, "ACPI_LPS0_PLATFORM_MASK is 0x%x\n", ACPI_LPS0_PLATFORM_MASK); acpi_handle_debug(adev->handle, "bitmask & ACPI_LPS0_PLATFORM_MASK is 0x%x\n", bitmask & ACPI_LPS0_P LATFORM_MASK); acpi_handle_debug(adev->handle, "ACPI_LPS0_SCREEN_MASK is %x\n", ACPI_LPS0_SCREEN_MASK); acpi_handle_debug(adev->handle, "bitmask & ACPI_LPS0_SCREEN_MASK is 0x%x\n", bitmask & ACPI_LPS0_SCR EEN_MASK); if ((bitmask & ACPI_LPS0_PLATFORM_MASK) == ACPI_LPS0_PLATFORM_MASK ... and received the following output: [ 0.000000] ACPI: LAPIC_NMI (acpi_id[0x01] low level lint[0x24]) [ 0.000000] ACPI: LAPIC_NMI (acpi_id[0x02] dfl res lint[0x1]) [ 0.000000] ACPI: LAPIC_NMI (acpi_id[0x03] dfl edge lint[0xc6]) [ 0.000000] ACPI: LAPIC_NMI (acpi_id[0x04] dfl dfl lint[0x44]) [ 0.060484] acpiphp: ACPI Hot Plug PCI Controller Driver version: 0.5 [ 0.116014] acpi PNP0A08:00: _OSC: OS supports [ExtendedConfig ASPM ClockPM Segments MSI] [ 0.116014] acpi PNP0A08:00: _OSC failed (AE_ERROR); disabling ASPM [ 0.139573] acpi:920: ACPI: \_SB_.PEPD: bitmask is 0x7 [ 0.139575] acpi:921: ACPI: \_SB_.PEPD: ACPI_LPS0_PLATFORM_MASK is 0x60 [ 0.139577] acpi:922: ACPI: \_SB_.PEPD: bitmask & ACPI_LPS0_PLATFORM_MASK is 0x0 [ 0.139579] acpi:923: ACPI: \_SB_.PEPD: ACPI_LPS0_SCREEN_MASK is 18 [ 0.139580] acpi:924: ACPI: \_SB_.PEPD: bitmask & ACPI_LPS0_SCREEN_MASK is 0x0 [ 0.139582] acpi:939: ACPI: \_SB_.PEPD: _DSM function mask: 0x7 [ 0.139584] acpi:754: ACPI: \: _DSM function 1 eval failed [ 0.139585] acpi:757: ACPI: \: out_obj is NULL [ 0.203942] clocksource: acpi_pm: mask: 0xffffff max_cycles: 0xffffff, max_idle_ns: 2085701024 ns -- You are receiving this mail because: You are watching the assignee of the bug. ------------------------------------------------------------------------------ Check out the vibrant tech community on one of the world's most engaging tech sites, Slashdot.org! http://sdm.link/slashdot _______________________________________________ acpi-bugzilla mailing list acpi-bugzilla@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/acpi-bugzilla