ACPI is shutting down my laptop spontaneously

From: Aaron Lehmann (aaronl_at_vitelus.com)
Date: 08/08/03

  • Next message: Matt Tolentino: "[patch] modify data types in efi.h" 
    Date:	Thu, 7 Aug 2003 15:17:11 -0700
To: linux-kernel@vger.kernel.org

    I upgraded my laptop to 2.6 yesterday from a late 2.4 kernel. I had
    always used APM, and thought this would be a good time to try ACPI. It
    seems to do basically what APM did (show me the battery level,
    basically) with a lot more complexity. The only problem that I've had
    is that ACPI shuts the machine off when it's under heavy load.

    I've run distributed computing clients when connected to AC power
    ever since I got the laptop. It used to always run at full speed.
    Since the beginning of the summer, computations would really slow down
    once the machine heated up. A loop which took 50ms per iteration would
    slow down to 110-120ms after ten minutes. I'm not sure whether it was
    the summer heat or just poor design of the laptop. Since Dell stuck a
    desktop P4 in it, I wouldn't be surprised at the latter. Anyway,
    unless I mount the laptop specially and point a huge fan at it, it
    will slow down significantly when I load it heavily.

    ...Until I upgraded to 2.6.0-test2 and enabled ACPI. At the point
    where the CPU speed would have been scaled down before, the laptop
    simply halts, giving no warning except announcing it to every
    terminal. I don't like the way my laptop throttles the CPU speed to
    prevent overheating, but it's better than shutting down to prevent it.
    Is there any way to make ACPI throttle the clockspeed, which was
    presumably being done by the BIOS when I had APM enabled? For now I've
    switched back to APM and it's working fine. I have CPUFreq support
    enabled in the kernel.

    Here is the ACPI information from the log:

    ACPI: RSDP (v000 Acer) @ 0x000fe030
    ACPI: RSDT (v001 Acer TMH2
    ACPI: FADT (v001 Acer TMH2 00000.00001) @ 0x0ffe0054
    ACPI: BOOT (v001 Acer TMH2 00000.00001) @ 0x0ffe002c
    ACPI: DSDT (v001 H2 H2 00000.04096) @ 0x00000000
    ACPI: BIOS passes blacklist
    ...
    ACPI: Subsystem revision 20030714
    ACPI: Interpreter enabled
    ACPI: Using PIC for interrupt routing
    ACPI: PCI Root Bridge [PCI0] (00:00)
    PCI: Probing PCI hardware (bus 00)
    Transparent bridge - Intel Corp. 82801BA/CA/DB PCI Br
    ACPI: PCI Interrupt Routing Table [\_SB_.PCI0._PRT]
    ACPI: PCI Interrupt Routing Table [\_SB_.PCI0.AGP0._PRT]
    ACPI: PCI Interrupt Routing Table [\_SB_.PCI0.PCI1._PRT]
    ACPI: PCI Interrupt Link [PILA] (IRQs 3 4 5 6 7 10 *11 12 14 15)
    ACPI: PCI Interrupt Link [PILB] (IRQs 3 4 5 6 7 *10 11 12 14 15)
    ACPI: PCI Interrupt Link [PILC] (IRQs 3 4 5 6 7 10 *11 12 14 15)
    ACPI: PCI Interrupt Link [PILD] (IRQs 3 4 5 6 7 10 *11 12 14 15)
    ACPI: PCI Interrupt Link [PILE] (IRQs 3 4 5 6 7 10 *11 12 14 15)
    ACPI: PCI Interrupt Link [PILF] (IRQs 3 4 5 6 7 10 *11 12 14 15)
    ACPI: PCI Interrupt Link [PILG] (IRQs 3 4 5 6 7 10 *11 12 14 15)
    ACPI: PCI Interrupt Link [PILH] (IRQs 3 4 5 6 7 10 *11 12 14 15)
    ACPI: Embedded Controller [EC0] (gpe 29)
    Linux Kernel Card Services 3.1.22
    options: [pci] [cardbus] [pm]
    drivers/usb/core/usb.c: registered new driver usbfs
    drivers/usb/core/usb.c: registered new driver hub
    PCI: Using ACPI for IRQ routing
    PCI: if you experience problems, try
    using option 'pci=noacpi' or even 'acpi=off'
    ...
    ACPI: AC Adapter [AC] (on-line)
    ACPI: Battery Slot [BAT0] (battery present)
    ACPI: Power Button (FF) [PWRF]
    ACPI: Sleep Button (CM) [SLPB]
    ACPI: Lid Switch [LID]
    ACPI: Processor [CPU0] (supports C1)
    ACPI: Thermal Zone [THR1] (51 C)
    ACPI: Thermal Zone [THR2] (51 C)
    -
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