[lkml]   [2003]   [Aug]   [13]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
Messages in this thread
    SubjectRe: 2.4.22 APM problems with IBM Thinkpad's
    Ruben Puettmann writes:
    > hy,
    > cause many problems with acpi I try to get apm running on my ibm
    > thinkpad R40 ( 2722). But with 2.4.22-pre10 and 2.4.22-pre10-ac1.
    > Problems which happend:
    > apm -s don't work with radeonfb usb and so on see my mails on lkm the
    > last days
    > If CONFIG_APM_DISPLAY_BLANK is Y the thinkpad freezed on blanking the
    > display

    This sounds like a well-known APM/local-APIC clash.

    Never ever use DISPLAY_BLANK if you also have SMP or UP_APIC.

    With APIC support enabled (SMP or UP_APIC), APM must be constrained:
    CPU_IDLE off
    built-in driver, not module

    This is because the apm driver does BIOS calls, and many BIOSen
    (including the code in graphics cards, e.g. all Radeons it seems)
    like to hang if a local APIC timer interrupt arrives.
    To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
    the body of a message to
    More majordomo info at
    Please read the FAQ at

     \ /
      Last update: 2005-03-22 13:47    [W:0.028 / U:39.852 seconds]
    ©2003-2017 Jasper Spaans. hosted at Digital OceanAdvertise on this site