silly noise with module acpi/processor

From: Christian Hesse (mail_at_earthworm.de)
Date: 01/31/04

  • Next message: Arnd Bergmann: "Re: [klibc] Re: long long on 32-bit machines" 
    Date:	Sat, 31 Jan 2004 12:46:39 +0100 (CET)
To: "Kernel Mailing List" <linux-kernel@vger.kernel.org>

    Hello!

    I'm using Linux (kernel 2.6.2-rc3) on my Samsung X10 (Pentium M 1.4 GHz,
    Centrino) notebook. If I boot the system without ac-adapter connected and
    then modprobe the module processor the notebook makes a really silly
    noise. The noise disappears with load (i.e.starting a program) but
    reappears as soon as the processor ist idle again. Plugging in the
    ac-adapter fixes the problem. Disconnecting the adapter is no problem.
    Scaling down cpu-frequency makes the noise quiete, but it still resists.

    rmmod processor brings an oops:
    Oops: 0000 [#1]
    CPU: 0
    EIP: 0060:[<e1cdf28f>] Tainted: P
    EFLAGS: 00010296
    EIP is at 0xe1cdf28f
    eax: 00000000 ebx: 001bdf10 ecx: 00000008 edx: 00000000
    esi: d36f92f8 edi: 001bd989 ebp: d36f9200 esp: c04c5fc0
    ds: 007b es: 007b ss: 0068
    Process swapper (pid: 0, threadinfo=c04c4000 task=c043a6e0)
    Stack: 00099800 00000000 c04c4000 00099800 c0105000 0008e000 c0108a04
    00000816
    c04c6745 c043a6e0 00000000 c04e77e8 0000001b c04c6470 c04ef020 c010017e
    Call Trace:
    [<c0105000>] _stext+0x0/0x60
    [<c0108a04>] cpu_idle+0x34/0x40
    [<c04c6745>] start_kernel+0x185/0x1c0
    [<c04c6470>] unknown_bootoption+0x0/0x120

    Code: Bad EIP value.
    <0>Kernel panic: Attempted to kill the idle task!
    In idle task - not syncing

    Same behavior with 2.6.2-rc2 before the acpi update.

    With 2.6.2-rc2-mm1 the noise still resists if I plug in the ac-adapter.

    Let me know if you need additional information. Please cc me as I'm not
    subscribed to the list. 

    -- 
Christian Hesse
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