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    SubjectRe: seqlock/unlock(&xtime_lock) problems cause keyboard, time skew problems
    Date
    Jerry Cooperstein wrote:

    >> Does this notebook vary the clock rate? If so then using TSC for
    >> time of day clock is probably a problem. Try booting with notsc.
    >
    > I tried booting with notsc, the results were:
    >
    > for kernels through 2.5.63: kernel panic on boot, message saying pentium+
    > requires tsc
    >
    > for 2.5.64, 2.5.65: no failure, but no help.

    Check the boot msgs. You're kernel is compiled w/ CONFIG_X86_TSC, so it
    should print a warning as such stating it is ignoring the notsc option.

    Try compiling the kernel for i386 and the kernel then boot w/ notsc. Do be
    warned, if you're running w/ an i686 compiled glibc your box will hang
    after the "Freeing unused kernel memory: " msg.

    Another thing to check is if the lost-tick compensation code is biting you.
    Try commenting out the "detect_lost_tick()" call from timer_interrupt() in
    arch/i386/kernel/time.c

    Let me know if that changes anything.

    thanks
    -john


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