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    SubjectRe: Real-Time Preemption, -RT-2.6.12-final-V0.7.50-24
    On Mon, 27 Jun 2005, Chuck Harding wrote:

    > What can be causing the following message to appear in dmesg and
    > how can I fix it?
    >
    > BUG: scheduling with irqs disabled: kapmd/0x00000000/46
    > caller is schedule_timeout+0x51/0x9e
    > [<c02b3bc9>] schedule+0x96/0xf6 (8)
    > [<c02b43f7>] schedule_timeout+0x51/0x9e (28)
    > [<c01222ed>] process_timeout+0x0/0x5 (32)
    > [<c0112063>] apm_mainloop+0x7a/0x96 (24)
    > [<c0115e45>] default_wake_function+0x0/0x16 (12)
    > [<c0115e45>] default_wake_function+0x0/0x16 (32)
    > [<c0111485>] apm_driver_version+0x1c/0x38 (16)
    > [<c01126f7>] apm+0x0/0x289 (8)
    > [<c01127a6>] apm+0xaf/0x289 (8)
    > [<c010133c>] kernel_thread_helper+0x0/0xb (20)
    > [<c0101341>] kernel_thread_helper+0x5/0xb (4)
    >
    > This was also present in earlier final-V0.7.50 version I've tried
    > (since -00) I don't get hangs but that doesn't look like it should
    > be happening. Thanks.
    >
    another symptom (don't know if it's actually related) is that if I
    try to switch to a virtual consol (ctl-alt-chift-F[1..6] the screen
    won't change out of graphics mode - it goes black like it's trying
    to switch but comes back with the graphical screen which isn't responsive
    and hitting alt-F7 restores it to operation. I just rebooted to a kernel
    that doesn't have the RT-preempt patch but uses the same .config and
    everything for switching between X and virtual terminals works just fine.

    --
    Charles D. (Chuck) Harding <charding@llnl.gov> Voice: 925-423-8879
    Senior Computer Associate ICCD Fax: 925-423-6961
    Lawrence Livermore National Laboratory Computation Directorate
    Livermore, CA USA http://www.llnl.gov GPG Public Key ID: B9EB6601
    ------------------ http://tinyurl.com/5w5ey -----------------------
    -- I'm not fat, just horizontally disproportionate. --
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