# dmesg -s40000 | grep -i acpi
 BIOS-e820: 000000001ff70000 - 000000001ff7b000 (ACPI data)
 BIOS-e820: 000000001ff7b000 - 000000001ff80000 (ACPI NVS)
ACPI: RSDP (v000 ACER                                      ) @ 0x000f60c0
ACPI: RSDT (v001 ACER   Cardinal 0x20020919  LTP 0x00000000) @ 0x1ff74c20
ACPI: FADT (v001 ACER   Cardinal 0x20020919 PTL  0x0000001e) @ 0x1ff7af64
ACPI: BOOT (v001 ACER   Cardinal 0x20020919  LTP 0x00000001) @ 0x1ff7afd8
ACPI: DSDT (v001 ACER   Cardinal 0x20020919 MSFT 0x0100000d) @ 0x00000000
ACPI: Subsystem revision 20031002
ACPI: IRQ 9 was Edge Triggered, setting to Level Triggerd
ACPI: Interpreter enabled
ACPI: Using PIC for interrupt routing
ACPI: PCI Root Bridge [PCI0] (00:00)
ACPI: PCI Interrupt Routing Table [\_SB_.PCI0._PRT]
ACPI: PCI Interrupt Routing Table [\_SB_.PCI0.AGP_._PRT]
ACPI: PCI Interrupt Link [LNKA] (IRQs *10)
ACPI: PCI Interrupt Link [LNKB] (IRQs *10)
ACPI: PCI Interrupt Link [LNKC] (IRQs *10)
ACPI: PCI Interrupt Link [LNKD] (IRQs *5)
ACPI: PCI Interrupt Link [LNKE] (IRQs 3 4 5 7 9 11 12)
ACPI: PCI Interrupt Link [LNKF] (IRQs 3 4 5 7 9 11 12)
ACPI: PCI Interrupt Link [LNKG] (IRQs 10)
ACPI: PCI Interrupt Link [LNKH] (IRQs *10)
ACPI: Embedded Controller [EC0] (gpe 29)
ACPI: PCI Interrupt Routing Table [\_SB_.PCI0.HUB_._PRT]
ACPI: Power Resource [PFN0] (off)
ACPI: Power Resource [PFN1] (off)
ACPI: PCI Interrupt Link [LNKA] enabled at IRQ 10
ACPI: PCI Interrupt Link [LNKD] enabled at IRQ 5
ACPI: PCI Interrupt Link [LNKC] enabled at IRQ 10
ACPI: PCI Interrupt Link [LNKH] enabled at IRQ 10
ACPI: PCI Interrupt Link [LNKB] enabled at IRQ 10
ACPI: PCI Interrupt Link [LNKE] enabled at IRQ 10
PCI: Using ACPI for IRQ routing
PCI: if you experience problems, try using option 'pci=noacpi' or even 'acpi=off'
ACPI: AC Adapter [ACAD] (on-line)
ACPI: Battery Slot [BAT1] (battery absent)
ACPI: Battery Slot [BAT2] (battery absent)
ACPI: Power Button (FF) [PWRF]
ACPI: Lid Switch [LID]
ACPI: Sleep Button (CM) [SLPB]
ACPI: Fan [FAN0] (off)
ACPI: Fan [FAN1] (off)
ACPI: Processor [CPU0] (supports C1 C2 C3)
ACPI: Thermal Zone [THRM] (49 C)
cpufreq: No CPUs supporting ACPI performance management found.
ACPI: (supports S0 S3 S4 S5)