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    SubjectRe: 2.6.10-rc1-mm5
    On Sun, 14 Nov 2004, Stas Sergeev wrote:

    > Andrew Morton wrote:
    > > ftp://ftp.kernel.org/pub/linux/kernel/people/akpm/patches/2.6/2.6.10-rc1/2.6.10-rc1-mm5/
    > Here are the few new problems that
    > I've got:
    >
    > 1. Local APIC stopped working. I know
    > I have to add "lapic" to the command-line,
    > but now this doesn't help (in -mm4 either
    > I think). dmesg says:
    > ---
    > Kernel command line: ro root=/dev/hdc2 apm=power-off lapic nmi_watchdog=1
    > ...
    > Local APIC not detected. Using dummy APIC emulation.
    > ---
    > Is this known? Any other command-line option
    > to enable it again?

    Could you please apply the following patch and supply full dmesg?

    Thanks.

    Index: linux-2.6.10-rc1-mm5/arch/i386/kernel/apic.c
    ===================================================================
    RCS file: /home/cvsroot/linux-2.6.10-rc1-mm5/arch/i386/kernel/apic.c,v
    retrieving revision 1.1.1.1
    diff -u -p -B -r1.1.1.1 apic.c
    --- linux-2.6.10-rc1-mm5/arch/i386/kernel/apic.c 11 Nov 2004 17:24:27 -0000 1.1.1.1
    +++ linux-2.6.10-rc1-mm5/arch/i386/kernel/apic.c 13 Nov 2004 22:12:39 -0000
    @@ -733,8 +733,10 @@ static int __init detect_init_APIC (void
    extern void get_cpu_vendor(struct cpuinfo_x86*);

    /* Disabled by kernel option? */
    - if (enable_local_apic < 0)
    + if (enable_local_apic < 0) {
    + printk("%s:%d\n", __FILE__, __LINE__);
    return -1;
    + }

    /* Workaround for us being called before identify_cpu(). */
    get_cpu_vendor(&boot_cpu_data);
    @@ -760,6 +762,7 @@ static int __init detect_init_APIC (void
    * APIC only if "lapic" specified.
    */
    if (enable_local_apic <= 0) {
    + printk("%s:%d\n", __FILE__, __LINE__);
    apic_printk(APIC_VERBOSE,
    "Local APIC disabled by BIOS -- "
    "you can enable it with \"lapic\"\n");
    -
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